Answers
Using the total moment of inertia iy of the system found in part e, find the total kinetic energy k of the system. e is 11.5 kg•m₂/s₂.
What is kinetic energy?Kinetic energy is the energy of motion. It is present in any object that is in motion, including objects that are vibrating, spinning, or traveling in a straight line. Kinetic energy is equal to one half of the mass of the object multiplied by the square of its velocity. It is measured in joules (J) or kilojoules (kJ). Kinetic energy can be converted into other forms of energy, such as thermal energy (heat) or sound energy. It is also converted into mechanical energy during collisions, when objects interact with each other. Kinetic energy is an important concept in physics, as it is essential for understanding many natural phenomena, from the motion of planets to the propagation of waves.
K = (1/2)×Iy×ω2
K = (1/2)×7.25 kg•m₂×(2π/2)2
K = 11.5 kg•m₂/s₂
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Find the system's total kinetic energy k using the system's total moment of inertia, which can be determined in part e. e is 11.5 kg•m₂/s₂.
What is kinetic energy?Motion is created by kinetic energy. It can be found in any item that is moving, whether it is spinning, vibrating, or moving straight ahead.
Kinetic energy is determined by multiplying the object's mass by the cube of its velocity. J or kilojoules are used as units of (kJ). Kinetic energy can be transformed into different types of energy, such as sound or thermal energy (heat). During collisions, when things come into contact with one another, it is also transformed into mechanical energy.
The idea of kinetic energy is significant in physics because it is crucial to comprehending a variety of natural phenomena, such as the motion of planets and the propagation of waves.
K = (1/2)×Iy×ω2
K = (1/2)×7.25 kg•m₂×(2π/2)2
K = 11.5 kg•m₂/s₂
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Rest of the question is,
Express your answer in terms of m, ?, and r.
Part [tex]E: Iy=11m(r)^2[/tex]
Related Questions
A mass of 22 kg is suspended from a spring with a spring constant of 11
N/m and then released, creating periodic motion. At what distance below the
natural length of the spring will the mass finally come to rest? (Recall that g =
9.8 m/s²)
Answers
The mass will come to rest at its natural length, which is also its equilibrium position.
What is spring constant?
Spring constant (k) is a measure of the stiffness of a spring or other elastic object. It is defined as the force required to stretch or compress the spring by a unit distance, usually expressed in newtons per meter (N/m) or pounds per inch (lb/in).
The distance below the natural length of the spring at which the mass will come to rest can be calculated using the energy conservation principle, which states that the initial potential energy stored in the spring will be converted into the kinetic energy of the mass as it oscillates, and then back into potential energy when the mass reaches its maximum displacement.
The potential energy stored in a spring is given by:
U = (1/2)kx²
where U is the potential energy, k is the spring constant, and x is the displacement from the natural length of the spring.
At the maximum displacement, all the potential energy is converted into kinetic energy, given by:
K = (1/2)mv²
where K is the kinetic energy and m is the mass of the object.
Using the conservation of energy, we can equate the potential energy at the maximum displacement to the kinetic energy at the resting position:
(1/2)kx² = (1/2)mv²
Rearranging, we get:
x = sqrt[(mv²)/k]
To find the velocity of the mass at the resting position, we can use the conservation of energy again to equate the potential energy at the resting position to the kinetic energy at the maximum displacement:
(1/2)kx₀² = (1/2)mv_max²
where x₀ is the displacement from the natural length of the spring at the resting position, and v_max is the maximum velocity of the mass.
Rearranging, we get:
v_max = sqrt[(k/m)x₀²]
At the resting position, the velocity of the mass is zero, so we can use the equation of motion for simple harmonic motion to find the maximum displacement:
x_max = (v_max / w)
where w is the angular frequency of the oscillation, given by:
w = sqrt(k/m)
Substituting the expressions for v_max and w, we get:
x_max = sqrt[(k/m)x₀²] / sqrt(k/m)
Simplifying, we get:
x_max = x₀
Therefore, the maximum displacement of the mass from the natural length of the spring at the resting position is equal to the displacement from the natural length at the maximum displacement. Substituting the given values into the equation for x, we get:
x = sqrt[(22 kg x (0 m/s)²) / 11 N/m] = 0 m
Therefore, The mass will come to rest at its natural length, which is also its equilibrium position.
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The food pyramid shows the proportions of foods that should be eaten for good health. The foods at the base of the pyramid should be eaten more, and those at the peak of the pyramid should be eaten less. Write down everything you eat in one day. Then compare the foods you ate to the foods shown in the pyramid. How was your diet different? How was it similar? Did you eat many foods not shown? Once you have completed your log and answered the questions, turn it in to your teacher here. To see how your assignment will be graded, Information is very organized with well‐constructed paragraphs and subheadings. Amount of Information (3) All topics are addressed and all questions answered with at least 2 sentences about each. Quality of Information (3) Information clearly relates to the main topic. It includes several supporting details and/or examples.
Answers
Comparing my diet to the food pyramid, I can see that my diet is similar in some ways and different in others.
How to explain the informationFor breakfast, I had a bowl of oatmeal with almonds, blueberries, and a drizzle of honey. For lunch, I had a turkey sandwich with lettuce, tomato, and avocado on whole wheat bread. I also had a side of carrot sticks and hummus. For dinner, I had grilled salmon with roasted sweet potatoes and broccoli. For snacks throughout the day, I had an apple, a handful of grapes, and a small serving of dark chocolate.
Comparing my diet to the food pyramid, I can see that my diet is similar in some ways and different in others. For example, my breakfast of oatmeal with blueberries is a good source of whole grains and fruits, which are both recommended in the food pyramid. Similarly, my lunch of turkey sandwich on whole wheat bread with vegetables provides a good balance of protein, whole grains, and vegetables. My snack of fruit, such as apples and grapes, is also recommended in the food pyramid as a healthy option for snacking.
However, there are also some differences in my diet compared to the food pyramid. For instance, my diet did not include any dairy products or legumes, which are both recommended in the food pyramid. Additionally, my dinner did not include any grains, which are also recommended in the food pyramid. Instead, I had sweet potatoes, which are a good source of complex carbohydrates.
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problem 1
A train starts at rest, accelerates with constant acceleration a for 5minutes,then travels at constant speed for another 5minutes,and the decelerates with a.suppose it travels a distance of 10km in all find a
problem 2
A ball is dropped from a height of 10m.At the same time, another ball is thrown vertically upwards at an initial speed of 10m/sec.How high above the ground will the two balls collide
problem 3
find the resultant of the two velocity vectors and also, find the angle that the resultant makes with the vector
Answers
The constant acceleration of the train is 50/9 m/s².
The two balls will collide at a height of approximately 10.204 meters above the ground.
How to calculate the valueUsing the kinematic equations of motion, we have:
distance = initial velocity * time + 1/2 * acceleration * time^2
For the first phase of acceleration, the initial velocity is zero, the time is 5 minutes = 300 seconds, and the distance traveled is unknown. So we have:
d1 = 0 + 1/2 * a * (300)^2
For the second phase of constant speed, the initial velocity is v, the time is 5 minutes = 300 seconds, and the distance traveled is also unknown. So we have:
d2 = v * 300
For the third phase of deceleration, the initial velocity is v, the time is also 5 minutes = 300 seconds, and the distance traveled is again unknown. So we have:
d3 = v * 300 + 1/2 * (-a) * (300)^2
The total distance traveled is the sum of these three distances:
distance = d1 + d2 + d3 = 1/2 * a * (300)^2 + v * 600 - 1/2 * a * (300)^2 = v * 600
Since the total distance traveled is given as 10 km = 10000 m, we have:
v * 600 = 10000
Solving for v, we get:
v = 10000/600 = 50/3 m/s
Now we can use the second equation above to find a:
d2 = v * 300 = (50/3) * 300 = 5000 m
Therefore, the constant acceleration of the train is:
a = 2 * (5000 - 1/2 * a * (300)^2) / (300)^2 = 50/9 m/s^2
The constant acceleration of the train is 50/9 m/s^2.
Problem 2: The height of the first ball dropped is given as 10m. Let's assume the height of the collision point is h meters above the ground.
Using the kinematic equation for free fall, we have:
h = 10 + 1/2 * g * t^2
where g is the acceleration due to gravity, which is approximately 9.81 m/s^2, and t is the time it takes for the second ball to reach the collision point after being thrown upwards.
The initial upward velocity of the second ball is 10 m/s, and we know that at the collision point, its velocity will be zero, since it will have reached its maximum height and will be momentarily at rest before falling back down.
Using the kinematic equation for motion with constant acceleration, we have:
0 = 10 + (-g) * t
Solving for t, we get:
t = 10/g = 10/9.81 seconds
Substituting this value of t into the first equation, we get:
h = 10 + 1/2 * 9.81 * (10/9.81)^2
Simplifying, we get:
h = 10.204 m
The two balls will collide at a height of approximately 10.204 meters above the ground.
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What is the
equivalent
capacitance of this
combination?
(Remember, μ means 10-6.)
HHH
25 μF 15 μF
[?] × 10²¹ F
X
Answers
The equivalent capacitance of this combination is 9.375 μF, or 9.375 × 10⁻⁶ F in scientific notation.
What is capacitor ?
A capacitor is an electronic component that stores electrical energy in an electric field. It consists of two conductive plates separated by a non-conductive material, called a dielectric. When a voltage is applied to the capacitor, electric charge builds up on the plates, creating an electric field between them. The amount of charge that can be stored on the plates depends on the capacitance of the capacitor, which is determined by the size and spacing of the plates, as well as the properties of the dielectric material.
When capacitors are in series, their effective capacitance is given by:
1/C_series = 1/C_1 + 1/C_2 + ...
In this case, we have two capacitors in series, with capacitances of 25 μF and 15 μF:
1/C_series = 1/25μF + 1/15μF
1/C_series = (15 + 25)/(1525μF²)
1/C_series = 40/(375*μF²)
C_series = 375*μF²/40
C_series = 9.375 μF
Therefore, the equivalent capacitance of this combination is 9.375 μF, or 9.375 × 10⁻⁶ F in scientific notation.
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The beat frequency produced when a 240 hertz tuning fork and a 246 hertz tuning fork are sounded together is
a) 245 hertz
b) 240 hertz
c) 12 hertz
d) 6 hertz
e) none of the above
Answers
The beat frequency produced when a 240-hertz tuning fork and a 246-hertz tuning fork are sounded together would be 6 hertz. Option D.
Frequency combinationThe beat frequency produced when two tuning forks are sounded together is equal to the absolute value of the difference between their frequencies.
In this case, the beat frequency is:
|240 Hz - 246 Hz| = |-6 Hz| = 6 Hz
Therefore, the answer is (d) 6 hertz.
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What items are not part of the integral part of the forklift equipment but is used to hold a load or loads?
Answers
Forklift attachments are not integral parts of the forklift equipment but are used to hold a load or loads. Examples of forklift attachments include fork extensions, side shifters, clamps, rotators, and pallet handlers.
A forklift is a piece of heavy equipment that is primarily used to lift and move materials over short distances. It typically consists of a power-operated platform, called a pallet, that can be raised and lowered using hydraulic cylinders. The pallet is attached to a set of forks that can slide under a load, allowing it to be lifted and moved.
Forklifts are commonly used in warehouses, manufacturing facilities, and construction sites, where they can quickly and efficiently move heavy materials from one location to another. They are also used to load and unload trucks and shipping containers. Forklifts come in a variety of sizes and configurations, ranging from small, electric-powered models for indoor use, to large, diesel-powered models for outdoor applications.
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Help please! View attachment below
Answers
Answer:
it is A
Explanation:
Henry knocked a book off a bookshelf. The book fell to the ground. So did the gravitational energy for that increase, decrease, or stay the same?
Answers
Answer:
Explanation:
As the book fell to the ground, its potential energy decreased, and its kinetic energy increased. The total energy (potential energy + kinetic energy) of the book remained constant as per the Law of Conservation of Energy. Therefore, the gravitational potential energy of the book decreased, and the kinetic energy increased, resulting in a transfer of energy from potential to kinetic energy. Therefore, the gravitational energy decreased.
) We put on a bigger engine (1111N) but the cart still moves forward 22m How much work is done no
Why would you put on a bigger engine if you are still moving 22m?
Answers
The work done when a force of 111 N is applied to move a cart a distance of 22 m is 2,442 J (joules).
What is the work done on the cart?To determine the work done when a force is applied to move an object, we use the formula:
work = F x d
where:
F is the applied force in Newtons (N)d is the displacement of the object in meters (m)Therefore, we can calculate the work done as:
work = force x distance
work = 111 N x 22 m x 1 = 2,442 J
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Which of the following items IS NOT regarded as a source of entropy generation in Engineering Thermodynamics?
Answers
Entropy is a measure of disorder in a system and is generated by a variety of sources in Engineering Thermodynamics. The item that is NOT regarded as a source of entropy generation is heat capacity (C). Entropy is instead generated by heat transfer (Q), changes in pressure (P), and changes in temperature (T).
The correct option is (d) periodic maintenance of machines.Entropy is a measure of disorder in a system that is used in thermodynamics. It is related to the amount of energy that is unavailable to do work. The increase in entropy is a natural consequence of energy transformations that occur in all real processes.
The second law of thermodynamics is the basis of the concept of entropy, which states that the total entropy of a closed system always increases over time, and it never decreases. Therefore, all real processes tend towards equilibrium, which is characterized by maximum entropy.Answer:(d) periodic maintenance of machines.
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A bug slides back and forth in a bowl 12 cm deep, starting from rest at the top, as shown in Fig. 7.20. The bowl is frictionless except for a 1.8-cm-wide sticky patch on its flat bottom, where the coefficient of friction is 0.83. How many times does the bug cross the sticky region?
Answers
The bug will cross the sticky region once in each cycle of its motion, where a cycle is defined as one complete round trip from the top of the bowl to the bottom and back to the top.
To find the number of cycles the bug goes through, we can use conservation of mechanical energy. At the top of the bowl, the bug has only potential energy, which is converted to kinetic energy as it slides down the bowl. At the bottom of the bowl, all of the potential energy has been converted to kinetic energy, and as the bug slides up the other side of the bowl, the kinetic energy is converted back into potential energy. At the top of the bowl again, the bug has only potential energy, and the cycle repeats.
Because there is no friction (except for the sticky patch), the total mechanical energy of the system is conserved. Therefore, the potential energy at the top of the bowl is equal to the potential energy at the bottom of the bowl, and the kinetic energy at the bottom of the bowl is equal to the kinetic energy at the top of the bowl.
We can set the potential energy at the top of the bowl to zero, and use the conservation of energy to find the potential energy at the bottom of the bowl:
mgh = (1/2)mv^2
where m is the mass of the bug, g is the acceleration due to gravity, h is the depth of the bowl, and v is the speed of the bug at the bottom of the bowl.
Solving for v, we get:
v = sqrt(2gh)
Plugging in the numbers, we get:
v = sqrt(29.810.12) = 0.775 m/s
The time it takes for the bug to slide from the top of the bowl to the bottom and back up to the top is twice the time it takes to slide from the top to the bottom:
t = 2sqrt(2h/g) = 2sqrt(2*0.12/9.81) = 0.774 s
Therefore, the frequency of the bug's motion is:
f = 1/t = 1/0.774 = 1.29 Hz
Since the bug completes one cycle in each oscillation, the bug will cross the sticky region 1.29 times per second, or approximately once every 0.78 seconds.
Help please (View attachment below)
Answers
Answer:
To calculate the amount of heat absorbed by the ice, we need to use the equation:
Q = m * ΔHf
where Q is the heat absorbed by the ice, m is the mass of the ice, and ΔHf is the heat of fusion of the ice, which is 334 J/g.
First, we need to calculate the amount of heat lost by the water:
Q = m * c * ΔT
where Q is the heat lost by the water, m is the mass of the water, c is the specific heat capacity of water, and ΔT is the temperature change of the water.
We know that the mass of the water is 100 g, c is 4.18 J/g-°C, and ΔT is 5°C, so:
Q = 100 g * 4.18 J/g-°C * 5°C
Q = 2090 J
This means that the water lost 2090 J of heat, which was absorbed by the ice. Now we can calculate the amount of heat absorbed by the ice:
Q = m * ΔHf
We know that the mass of the ice is 10 g and the heat of fusion of the ice is 334 J/g, so:
Q = 10 g * 334 J/g
Q = 3340 J
Therefore, the amount of heat absorbed by the ice is 3340 J, which is equivalent to 3.34 kJ (kilojoules). The closest answer choice is 2.09 kJ, but that is not the correct answer.
FILL IN THE BLANK the inevitable process causing increase in choose____ in the universe and loss in useful energy is called entropy.
Answers
the inevitable process causing increase in disorder in the universe and loss in useful energy is called entropy.
Determine the value of Kc for the following reaction if the equilibrium concentrations are as follows: [HCl]eq = 0.13 M, [HI]eq = 5.6 × 10-16 M, [Cl2]eq = 0.0019 M. 2HI(g)+Cl2(g) ⇌ 2HCl(g)+I2(s)
A) 8.2 × 10-18
B) 2.8 × 1031
C) 1.4 × 10-19
D) 3.5 × 10-32 E) 1.2 × 1017
Answers
The value of [tex]K_c[/tex] for the given reaction is 1.2 × [tex]10^{17}[/tex].
Hence, the correct option is E.
The given reaction is,
2HI(g) + [tex]Cl_2[/tex](g) ⇌ 2HCl(g) + [tex]I_2[/tex](s)
As per the given data:
[tex][HCl]_{eq}[/tex] = 0.13 M,
[tex][HI]_{eq}[/tex] = 5.6 × 10-16 M,
[[tex]Cl_2[/tex][tex]]_{eq}[/tex] = 0.0019 M
The expression for the equilibrium constant, [tex]K_c[/tex] is given as:
[tex][HCl]^2[I_2]\:/\:[HI]^2[ Cl_2][/tex]
A chemical reaction enters a state of equilibrium or equilibrium concentration when the rate of forward reaction equals the rate of backward reaction.
Substitute the given equilibrium concentrations to obtain the equilibrium constant, [tex]K_c[/tex];
[tex]K_c[/tex] = [tex][0.13]^2[5.6 \times 10^{-16}]\: /\:[0.0019]^2[/tex]
[tex]K_c[/tex] = 1.2 × [tex]10^{17}[/tex]
The value of [tex]K_c[/tex] for
2HI(g) + [tex]Cl_2[/tex](g) ⇌ 2HCl(g) + [tex]I_2[/tex](s) is 1.2 × [tex]10^{17}[/tex]
So option E right choice.
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fill in the blank. consider as a parametrized surface in the natural way. write the equation of the tangent plane to the surface at the point given that___and ___
Answers
The equation of the tangent plane to the surface at the point [tex]{eq}(2, 3, 9){/eq} is {eq}x + 4y + 12z = 142{/eq}.[/tex]
When writing the equation of the tangent plane to the surface at the given point, you must provide the values of two derivatives.
The full statement of the question is:
Consider[tex]{eq}S: \vec{r}(u,v) = (u, u^2 + v, u^3 + v^2) {/eq}[/tex] as a parametrized surface in the natural way.
Write the equation of the tangent plane to the surface at the point given that[tex]{eq}u=2 {/eq} and {eq}v=1 {/eq}.[/tex]
The equation of the tangent plane to the surface at the point [tex]{eq}(2, 3, 9){/eq}[/tex]is given by:
[tex]{eq}\vec{r_u}(u,v) \cdot (x-2) + \vec{r_v}(u,v) \cdot (y-3) + \vec{r}(u,v) \cdot (z-9) = 0 {/eq}[/tex]
where[tex]{eq}\vec{r_u}{/eq} and {eq}\vec{r_v}{/eq}[/tex]are the derivatives of the parametric equation with respect to [tex]{eq}u{/eq} and {eq}v{/eq},[/tex] respectively.
These are given by:
[tex]{eq}\vec{r_u}(u,v) = (1, 2u, 3u^2) {/eq}{eq}\vec{r_v}(u,v) = (0, 1, 2v) {/eq}[/tex]
To evaluate these at the point [tex]{eq}(2, 1){/eq},[/tex]
substitute these values into the expressions above:
[tex]{eq}\vec{r_u}(2,1) = (1, 4, 12) {/eq}{eq}\vec{r_v}(2,1) = (0, 1, 2) {/eq}[/tex]
Then, substitute these and the point into the equation of the plane:
[tex]{eq}\vec{r_u}(2,1) \cdot (x-2) + \vec{r_v}(2,1) \cdot (y-3) + \vec{r}(2,1) \cdot (z-9) = 0 {/eq}[/tex]
Simplifying, we obtain:
[tex]{eq}(x-2) + 4(y-3) + 12(z-9) = 0 {/eq}[/tex]
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FILL IN THE BLANK _____ is a type of measurement error that results in systematically over- or under-measuring the value of a concept.
Answers
Systematic error is a type of measurement error that results in systematically over- or under-measuring the value of a concept.
A systematic error is a type of measurement error that results in systematic over- or under-measuring the value of a concept.
A systematic error is one that happens consistently and is caused by a flaw in the measurement system or equipment. It is often caused by calibration problems, instrument drift, or a problem with the environment in which the measurement is taken.
This error can be rectified by improving the measurement system or equipment.Therefore, the correct option is the one which states that the systematic error is a type of measurement error that results in systematically over- or under-measuring the value of a concept.
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the frequency of two alleles in a gene pool is 0.19 (a) and 0.81(a). assume that the population isin hardy-weinberg equilibrium.
Answers
Based on the information given, we can assume that there are two alleles for a particular gene in a population: allele "A" with frequency of 0.19 and allele "a" with frequency of 0.81.
What is the frequency?
If the population is in Hardy-Weinberg equilibrium, then the allele frequencies will remain constant from generation to generation.
According to the Hardy-Weinberg equation, the expected genotype frequencies can be calculated as follows:
AA genotype frequency = p^2 = (0.19)^2 = 0.0361Aa genotype frequency = 2pq = 2(0.19)(0.81) = 0.3082aa genotype frequency = q^2 = (0.81)^2 = 0.6561
What is genotype?
These genotype frequencies should remain constant in future generations as long as the assumptions of the Hardy-Weinberg equilibrium are met, such as random mating, no migration, no mutation, no natural selection, and large population size.
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Help please, view attachment below
Answers
Answer: you are right, its entodermic
Explanation:
The enthalpy of the products in an entodermic reaction is greater than the enthalpy in the reactants.
TRUE OR FALSE when a laser beam goes from glass out into air it will deviate such that it is further away from the surface normal.
Answers
Correct, this is due to the fact that glass has a higher refractive index than air.
What happens when a laser enters a glass surface?We are aware that laser light travels in a straight line, but it bends when it passes through a glass slab. Refraction of light describes the way a laser beam bends as it passes through transparent media.
What transpires to the light beam when it travels from the air to the glass?Light slows down when it enters a material with a higher refractive index, such as glass from air. When facing the straight line, the light sways. When light penetrates a material with a lower refractive index, it moves more quickly.
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How much heat transfer is required to completely boil 1500 g of water (already at its boiling point of 100 C ) into a gas ?
Answers
Answer:
Explanation:
The heat required to completely boil a certain amount of water is given by the formula:
Q = mL
where Q is the heat required, m is the mass of the water, and L is the specific heat of vaporization of water, which is 2260 J/g.
Using the given values:
m = 1500 g
L = 2260 J/g
Substituting these values into the formula, we get:
Q = 1500 g × 2260 J/g
Q = 3,390,000 J
Therefore, 3,390,000 joules of heat transfer is required to completely boil 1500 g of water into a gas.
A person with a mass of 55.0 kg jumps straight upwards, gaining 820.0 J of gravitational potential energy. How high did the person jump?
Answers
m=55.0 D=820 so were are looking for the velocity ? v= m\d V = 55.0*820 =45100 ...
A rock is launched at a 50-degree angle above the horizontal with
an initial velocity of +16 m/s.
a. Calculate the rock's maximum height.
Answers
Explanation:
Vertical component of velocity
= 16 sin 50 = 12.3 m/s
Vertical height will be given by
h = vo t + 1/2 a t^2
h = 1/2 ( -9.81) t^2 + 12.3 t
h = - 4.905 t^2 + 12.3 t
will have max at t = - b/2a = -12.3/(2*(-4.905) ) = 1.25 sec
use this value of 't' in the equation to find the max height:
h = - 4.905 ( 1.25^2) + 12.3 ( 1.25) = 7.7 meters max height
Please read the attached image.
At the time
t1 = 0,
an object with a mass
m = 8.51 kg
passes through the origin with a velocity
v1 = (5.21î − 2.81ĵ) m/s.
At a time
t2 = 2.00 s,
the object is at the position
r = (8.00î + 4.00ĵ) m.
Assume that the force acting on the object during the time interval
Δt = t2 − t1
is constant and determine the following.
(a) the kinetic energy of the object at the time
t1
149.12
Correct: Your answer is correct.
J
(b) the force acting on the object during the time interval
Δt = t2 − t1
(Express your answer in vector form.)
F =
Incorrect: Your answer is incorrect.
See if you can use the kinematic equations to determine the acceleration of the object and then the force acting on the object during the time interval
Δt = t2 − t1.
N
(c) the work done on the object by the force during the time interval
Δt = t2 − t1
-188.8
Incorrect: Your answer is incorrect.
See if you can write an expression for the work done on the object in terms of the force acting on the object and the subsequent displacement of the object. J
(d) the kinetic energy of the object at the time
t2
J
(e) the speed of the object at the time
t2
m/s
Answers
Answer:
Explanation:
(a) The kinetic energy of the object at time t1 is given by:
K1 = (1/2)mv1^2
where m = 8.51 kg and v1 = (5.21î − 2.81ĵ) m/s. Substituting these values, we get:
K1 = (1/2)(8.51 kg)(5.21î − 2.81ĵ)^2 = 149.12 J
Therefore, the kinetic energy of the object at time t1 is 149.12 J.
(b) The displacement of the object during the time interval Δt = t2 − t1 is given by:
Δr = r2 − r1 = (8.00î + 4.00ĵ) m - 0î - 0ĵ = 8.00î + 4.00ĵ
The average velocity of the object during this time interval is:
vavg = Δr/Δt = (8.00î + 4.00ĵ)/(2.00 s - 0 s) = 4.00î + 2.00ĵ m/s
Using the kinematic equation:
Δv = aΔt
where Δv = v2 - v1 is the change in velocity during the time interval, we can solve for the acceleration:
a = Δv/Δt = (v2 - v1)/Δt = [(8.00î + 4.00ĵ) m/s - (5.21î − 2.81ĵ) m/s]/(2.00 s - 0 s) = 1.395î + 3.415ĵ m/s^2
The force acting on the object during the time interval Δt = t2 − t1 is given by Newton's second law:
F = ma = (8.51 kg)(1.395î + 3.415ĵ) m/s^2 = 11.83î + 29.05ĵ N
Therefore, the force acting on the object during the time interval Δt is F = 11.83î + 29.05ĵ N.
(c) The work done on the object by the force during the time interval Δt = t2 − t1 is given by:
W = F · Δr
where · denotes the dot product. Substituting the values of F and Δr, we get:
W = (11.83î + 29.05ĵ) N · (8.00î + 4.00ĵ) m = 95.52 J
Therefore, the work done on the object by the force during the time interval Δt is -95.52 J.
Note: The negative sign indicates that the work done by the force is negative, i.e., the force acts in the opposite direction to the displacement of the object.
(d) The kinetic energy of the object at time t2 is given by:
K2 = (1/2)mv2^2
where m = 8.51 kg and v2 is the velocity of the object at time t2. To find v2, we can use the kinematic equation:
v2 = v1 + aΔt
where a is the acceleration of the object during the time interval and Δt = t2 − t1. Substituting the values, we get:
v2 = (5.21î − 2.81ĵ) m/s + (1.395î + 3.415ĵ) m/s^2(2.00 s)
A circuit is constructed with four resistors, one capacitor, one battery and a switch as shown. The values for the resistors are: R1 = R2 = 36 ?, R3 = 77 ? and R4 = 120 ?. The capacitance is C = 67 ?F and the battery voltage is V = 12 V. The positive terminal of the battery is indicated with a + sign.
A circuit is constructed with four resistors, one
1)The switch has been open for a long time when at time t = 0, the switch is closed. What is I4(0), the magnitude of the current through the resistor R4 just after the switch is closed?
I found the answer for number 1. It's 0.06647
2)What is Q(?), the charge on the capacitor after the switch has been closed for a very long time?
3)After the switch has been closed for a very long time, it is then opened. What is Q(topen), the charge on the capacitor at a time topen = 555 ?s after the switch was opened?
4)What is IC,max(closed), the current that flows through the capacitor whose magnitude is maximum during the time when the switch is closed? A positive value for the current is defined to be in the direction of the arrow shown.
5)What is IC,max(open), the current that flows through the capacitor whose magnitude is maximum during the time when the switch is open? A positive value for the current is defined to be in the direction of the arrow shown.
Answers
The magnitude of the current through the resistor R4 just after the switch is closed so the total current 0.06647 A.
(1)
The capacitor acts as short circuit just after the switch is closed.
The equivalent resistance is,
[tex]R_{eq}=R_1+R_2 || R_3+R_4\\=R_1+\frac{R_2R_3}{R_2+R_3}+R_4\\=(36)+\frac{(36)(77)}{(36)+(77)}+(120)\\[/tex]
= 180.53 Ω
Use Ohm's law to solve for total current.
V = IR
I= V/ R
[tex]=\frac{12 V} {180.53}[/tex]
= 0.06647 A
(2)
The capacitor is a break in the circuit after long time has passed since the switch was closed. The potential across capacitor is same as potential across R..
The equivalent resistance of the circuit is,
[tex]R_{eq}=R_1+ R_3+R_4[/tex]
=36Ω+77Ω+120Ω
= 233 Ω
Use Ohm's law to calculate I.
V = IR
I= V / R_eq
[tex]=\frac{12 V} {233}[/tex]
= 0.0515 A
Use Ohm's law to solve for Voltage [tex]V_3[/tex].
[tex]V_3=IR_3[/tex]
=(0.0515 A) (772)
= 3.97 V
The charge on the capacitor is,
C= Q/V
Q(∞)=CV
[tex]=(67\mu F (10^{-6} F/1 \mu F) (3.97 V)\\[/tex]
= 2.657× [tex]10^{-4} C[/tex]
(3)
The expression of charge of the capacitor while discharging is,
[tex]Q(t)=Qe^ {\frac{1}{RC}}[/tex]
The total resistance is,
[tex]R_{eq}=R_2+ R_3[/tex]
= 36 Ω + 77 Ω
= 113 Ω
The charge after 555 us is,
Q(555 us)=(2.657×10^-4 C)exp[tex](\frac{(-555 us } {(113)(67 \mu F)})[/tex]
=2.47×10 C
(4)
Use Ohm's law to solve for potential difference on the combination of R2 and R.
[tex]V_{23} = IR_{23[/tex]
[tex]=(0.06647A)\frac{(36)(77)}{(36)+(77)}\\=1.63 V[/tex]
= 1.63 V
The current [tex]I_C_{max[/tex] is,
V = IR
[tex]I_C_{max}=\frac{V_{23}} {R_{2}}[/tex]
= 1.63 V/ 36Ω
= 4.53×10^-2 A
(5)
The maximum potential by capacitor is, V = 3.97 V
Use Ohm's law to solve for current.
[tex]I_C_{max[/tex]=V/R
=3.97 V/113 Ω
=3.51×10^-2 A
Current refers to the flow of electric charge through a conductor. It is measured in units of amperes (A), which represent the rate at which electric charge flows through a circuit. The flow of current is driven by a difference in electric potential, or voltage, between two points in the circuit. There are two types of current: direct current (DC) and alternating current (AC). Most electronic devices and appliances use DC, while AC is typically used to transmit electricity over long distances.
Understanding current is crucial to many fields, including electrical engineering, physics, and electronics. It is also important for everyday life, as we rely on electricity to power our homes, cars, and devices. Properly managing current is critical for ensuring safety and avoiding electrical hazards.
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When a water heater is rated to operate at 240 volts but is operated at 208 volts, the water heater will take___ time to heat the water.Select one:a. moreb. the samec. less
Answers
a. more When a water heater is rated to operate at 240 volts but is operated at 208 volts, the lower voltage means that the heating element in the water heater will not receive as much power as it is designed.
What is a power ?Power is the rate at which work is done or energy is transferred, typically measured in watts or horsepower. It represents the amount of energy used or transferred per unit time.
Mathematically, power is defined as the product of force and velocity, or the product of current and voltage. The unit of power is the watt (W), which is equal to one joule of energy per second.Power is an important concept in physics, engineering, and technology. It is used to describe the output of engines, motors, generators, and other devices that convert energy from one form to another. In everyday life, power is used to measure the rate at which electricity is consumed by appliances and electronics, and to compare the performance of different machines and tools.
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125cm³ of a gas was collected at 15 °C and 755 mm of mercury pressure. Calculate the volume of the gas that will be collected at standard temperature and pressure
Answers
Answer:
119,2 см³
Explanation:
по формуле Клопейрона (P1×V1):T1=(P2×V2):T2
если из этой формулы найти V2, ответ будет равен примерно на 119,2 см³
Clinical psychologists are concerned with everyday problems of adjustment. True Or False
Answers
Answer:
True.
Explanation:
Clinical psychologists are mental health professionals who work with individuals, couples, families, and groups to address psychological and emotional problems that affect their daily lives. They are concerned with a wide range of issues, including but not limited to problems of adjustment, such as anxiety, depression, stress, relationship difficulties, and other emotional and behavioral issues. Clinical psychologists help their clients identify and understand their problems, and work with them to develop coping strategies and make positive changes in their lives.
Answer:
TRUE
Explanation:
Clinical psychologists are mental health professionals who work with individuals, couples, families, and groups to address psychological and emotional problems that affect their daily lives. They are concerned with a wide range of issues, including but not limited to problems of adjustment, such as anxiety, depression, stress, relationship difficulties, and other emotional and behavioral issues. Clinical psychologists help their clients identify and understand their problems, and work with them to develop coping strategies and make positive changes in their lives.
FILL IN THE BLANK. When it is time to end a reflux, first ____ in the flask and then turn off the heat. ______ until the system has cooled.
Answers
When it is time to end a reflux, first remove the heat source in the flask and then turn off the heat. Wait until the system has cooled.
A reflux is a technique in chemistry in which a reaction is performed with the aim of distilling volatile liquids with boiling points under the range of 150 to 200 °C. Refluxing is accomplished by heating the mixture to be heated to the boiling point, then allowing the vapors produced to travel through a condenser before returning to the boiling flask. The setup of reflux equipment can be seen below: For a successful refluxing, it is important to end the process by following the correct steps, which are given below
Remove the heat source in the flask Turn off the heat Wait until the system has cooled. Remove the heat source in the flask: This is to avoid the heat from causing a spark that might ignite the gas or the vapor in the flask. Turning off the heat source is also important in order to avoid overheating and thermal decomposition of the reactants. Wait until the system has cooled: This is to avoid breaking the apparatus, as it can happen if the apparatus is cooled too quickly, causing the glass to shatter.
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What accounts for the disparity between women's rights in the urban capital versus the more rural areas of Eritrea?
The practice of female genital mutilation is considered abhorrent in much of the world, and is in fact illegal even in Eritrea. Why would Laila be so conflicted about the procedure for her own daughter?
What are the implications for women's rights in Eritrea beyond this particular practice? What might bring about change?
Answers
Explanation:
The disparity between women's rights in urban and rural areas in Eritrea can be attributed to various factors such as cultural beliefs, traditional values, lack of education, and access to resources. Urban areas generally have more access to education, healthcare, and job opportunities, which can empower women and increase their participation in society. However, rural areas are often more traditional and conservative, and women may face more barriers to accessing education, healthcare, and employment opportunities.
Laila's conflict about the practice of female genital mutilation for her daughter is likely due to her cultural and social upbringing. While she may recognize the physical and psychological harm that the practice can cause, she may also feel pressure to conform to traditional values and beliefs. Additionally, there may be social consequences for not following the practice, such as being ostracized from the community.
Beyond female genital mutilation, women in Eritrea face various challenges to their rights and equality, including limited access to education, gender-based violence, and discrimination in employment and political representation. Bringing about change would require a multi-faceted approach, including education and awareness-raising campaigns, legal and policy reforms, and empowerment programs for women. It would also require addressing the underlying societal and cultural norms that perpetuate gender inequality.
a person (mass mp) and their dog (mass m) are sitting together at the left end of a boat that has a length of l
Answers
The centre of mass is located at the left end of the boat, where the person and their dog are sitting.
A person (mass mp) and their dog (mass md) are sitting together at the left end of a boat that has a length of l.
The boat will have a centre of mass that is determined by the following equation:
[tex]xcm = (m_p x p + m_d x d) / (m_p + m_d)[/tex]
Where:
xcm = the x-coordinate of the centre of mass
mp = the mass of the person
xp = the x-coordinate of the person
md = the mass of the dog
xd = the x-coordinate of the dog
Since the person and their dog are sitting together at the left end of the boat, we can assume that xp = xd = 0. Therefore, the x-coordinate of the centre of mass can be calculated as:
[tex]xcm = (m_p x 0 + m_d x 0) / (m_p + m_d)
xcm = 0[/tex]
This means that the centre of mass is located at the left end of the boat, where the person and their dog are sitting.
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