The radii of a wheel are 25cm and 5cm respectively.It is found that an effort of 40N is required to raise slowly a load of 160N.Find mechanical advantage
Answer:
4Explanation:
Mechanical advantage is defined as the ratio of the load to the effort applied to raise the load. If minimal effort is used to overcome a much larger load, that is when we have what is called mechanical advantage i.e a machine has been used to our advantage.
Mathematically, MA = Load/Effort
Given parameters
Load = 160N
Effort = 40N
Required
Mechanical Advantage
Using the formula above
MA = 160N/40N
MA = 4
advantage
what is the result of raising the temperature of the room in which a low-pressure chiller is located
Answer:
the result of raising the temperature of the room in which a low-pressure chiller is located is a
Faster Refrigerant Recovery
On increasing the temperature, the pressure of chiller will increase, causing the blow of hot air in the condenser, which is quite harmful for mechanism of machine.
The given problem is based on the effect of raising temperature on low-pressure chiller.
When temperature of room is raised, then the thermal energy waves last more longer and can cause various organic changes due to variation of chemical reactions.Since, the pressure is directly proportional to temperature. On increasing the temperature, one must increase the pressure of chiller and If the pressures get too high due to lack of air flow, or too hot of air being pulled in through the condenser of chiller, the pressure is going to rise in the machine, the switch will get damaged.Thus, we can conclude that on increasing the temperature, the pressure of chiller will increase, causing the blow of hot air in the condenser, which is quite harmful for mechanism of machine.
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In an effort to decrease the mAs of an exposure, the 15% rule of kVp change may be considered. Changing the original kVp of 84 using the 15% rule will have what impact
Answer:
Will result in :Greater Compton scatter interaction
Explanation
This is because The 15% rule states that changing the kVp by 15% has the same effect as doubling the mAs, or reducing the mAs by 50%; that is A 15% increase in kVp has the same effect as doubling the mAs and vice versa but in this case reducing mas causes more Compton scatter because Compton scattering occurs at a lower kvp
An element that is unable to create a ion and therefore always has a charge of 0 is most likely a member of a family called
Explanation:
'noble gases' which are also known as group VIII
The half-life of a radioisotope is 6.0 hours. Approximately how long will it take for the activity of a sample to be reduced by 98%?
Answer:
1 hours will be the best answer
The time taken for a sample to reduce by 98% is 33.86 hrs.
What is half life?Half life is the time taken by a radioactive material for the radioactivity of to reduce by half its original value.
The half life equation is:
A = A₀ (½)^(t / T)
where A is the final amount, A₀ is the initial amount, t is the amount of time, and T is the half life.
Given is the half-life of a radioisotope is 6.0 hours and activity of a sample to be reduced by 98%.
Final amount will be 1 - 0.98 = 0.02
Substituting the values, we get
0.02 = 1 (½)^(t / 6)
t = 6 {log(1/0.02)/log2}
t = 33.86 hrs
Thus, time taken is 33.86 hrs.
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What would an automobile engineer MOST LIKELY suggest to improve the efficiency of a car's engine? A) Remove the engine's cooling system. Eliminate B) Increase the air drag on the windshield. C) Utilize cheaper, low-grade gasoline for the engine. D) Reduce the internal friction of the engine's parts.
Answer:
D) Reduce the internal friction of the engine's parts.
Explanation:
To increase the efficiency of the car's engine, an engineer most like has to reduce the friction within the internal engine parts. Reducing these friction reduces the useful energy lost as heat in these internal parts of the engine, when the engine parts do work against friction to move. In most everyday activities, engines and machines, energy is usually lost as heat due to frictional forces arising from two or more surfaces in contact.
Answer:
D
Explanation:
Samantha walked 3.9x102 m and then 5.7x102 m. How many total meters did she walk?
Explanation:
397.8m+581.4 = 979.2m
What single property was the most important in Jesseca’s material?
Answer:
Jesseca wanted to create a material that reflected most of the light that fell on it.
Explanation:
Plato Answer
Answer:
Jesseca wanted to create a material that reflected most of the light that fell on it.
The cartesian coordinates of a point in the xy plane are x = −6.46 m, y = −3.78 m. Find the distance r from the point to the origin. Answer in units of m.
Explanation:
Use Pythagorean theorem:
r² = x² + y²
r² = (-6.46 m)² + (-3.78 m)²
r = 7.48 m
Wo siblings are arguing over what way to pull a 10 kg wagon. Boris wants to pull it to the right. Boris puts 220 N of force on the wagon. Natasha wants to pull it to the left. Natasha puts 250 N of force on the wagon. A) What is the net force on the wagon?B) What is the acceleration of the wagon?(Both parts require you to include the direction with your numerical answer.)
Answer:
a) Then net force acting on the wagon 30 [N] in a negative direction to the left
b)Acceleration of the wagon 3 m/s² in a negative direction to the left
Explanation:
The coordinates x and y show the positive direction in x-axis ( to the right) and negative direction to the left. In north-south direction positive y values are to the north and negative values to the south
The free-body diagram shows 4 forces acting
In y-axis:
The weight ( P = m*g = 10 [kg]*9,8 [m/s²] = 98 [N] negative
Normal reaction force Fn = P = 98 [N] positive ( surface is frictionless)
∑Fy = 0 P - Fn = 0 P = Fn = 98 [N]
In x-axis:
Boris pulling force to the right (positive ) 220 [N]
Natasha pulling force to the left ( negative) 250 [N]
∑Fx = m*a
220 [N] - 250 [N] = 10 Kg * a [N] = Kg * m /s²
-30 [kg*m/s²] = 10 * Kg * a
-30/10 = - 3 m/s² = a
Sign (-) means the direction of acceleration vector is to the left (the same direction of the movement )
Then net force acting on the wagon 30 [N] in negative direction to the left
Acceleration of the wagon 3 m/s² in negative direction to the left
A certain mass of oxygen has a volume of 5m^3 at 27°C.If the pressures remain constant,What will be its volume at 77°C?
I need the full answer with working
Answer:
With a pressure, for instance, of 4 atmospheres, and a volume of 5 liters yields 4 x 5 = 20. Divide the result by the number of moles of gas. If, for instance, the gas contains 2 moles of molecules: 20 / 2 = 10. Divide the result by the gas constant, which is 0.08206 L atm/mol K: 10 / 0.08206 = 121.86.
At 84.4 kg skier is on a 32.4 ° hill. Using X-Y axes tilted down the plane, what is the x-component of the weight?
The answer I got is 444.
At 84.4 kg skier is on a 32.4 ° hill. Using X-Y axes tilted down the plane. The x-component of the weight is 443.2 N.
What is newton's law?While Newton's second law of motion predicts that the ensuing acceleration is inversely proportional to the item's mass, his theory of gravity predicts that the gravitational force exerted on any object is proportionate to its mass.
According to Newton's Second Law of Motion, when a force applies on a mass, the mass accelerates (gains speed) (object).
X is the component of the weight
Wx = mg sinФ
Wx = 84.4 kg x 9.8 m/s² x Sin 32.4°
Wx = 443.2 N
Y- Component of weight
Wy = mg cosФ
Wy = 84.4 k ку x 9.8 m/s² x COS 32.4
Wy = 698.4N
Therefore, the x-component of the weight is 443.2 N.
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SOMEONE PLEASE HURRY!!! Identify when work is done and calculate work (in physics)
If a body with a mass of 4 kg is moved by a force of 20 N, what is the rate of its acceleration?
Explanation:
F = ma
20 N = (4 kg) a
a = 5 m/s²
What derived unit is used to measure the slope of the line in this graph?
A. g/cm^3
B. g
C. g/cm
D. cm^3
Answer:
g/cm³
Explanation:
From the question given above,
The y-axis is representing mass (g)
The x-axis is representing volume (cm³)
Unit of slope =?
Slope of a graph is simply defined as the change in y-axis divided by the change in x-axis. Mathematically it is expressed as:
Slope = change in y-axis (Δy)/change in x-axis (Δx)
Slope = Δy/Δx
Thus, with the above formula, we can obtain the unit used for measuring the slope as follow:
y-axis = mass (g)
x-axis = volume (cm³)
Slope =.?
Slope = Δy/Δx
Slope = mass (g) /volume (cm³)
Slope = g/cm³
Therefore, the derive unit used for measuring the slope is g/cm³
Is it possible to obtain absolute weighless on thr earth surface?
Answer:
Rmmbr... Absolute gravity means zero gravity..
No, and we don't have a zero gravity environment in space, either.
On the ISS, gravity is very much working. Here on the surface, we experience an acceleration of gravity of about 9.81 m/s^2. On the space station they experience a slightly reduced acceleration (about 9.2 m/s^2) because of their increased distance from the center of the Earth (gravity is a 1/r^2 law).
What we are actually experiencing on the ISS is a state of free-fall. Gravity is pulling the astronauts down, just as if they had stepped out of an airplane, but it is also pulling the ISS down. We feel weight on the ground because gravity pulls us down and the ground, not wanting to move, pushes back up at us.
We call the environment on the ISS weightlessness. An astronaut could stand on a scale and appear to have no weight because the scale is falling, too, and therefore can't push back up at us.
The two ways that we best simulate this environment on the Earth is by using airplanes that fly in (approximately) parabolic paths to put the inhabitants and vehicle into free-fall and by working in swimming pools where the neutral buoyancy feels similar to being in free-fall.
the satellites stay in their orbits around the earth without the need of any amount of fuel
Explain this statement
Answer:
Satellites are able to orbit around the planet because they are locked into speeds that are fast enough to defeat the downward pull of gravity. ... Satellites do carry their own fuel supply, but unlike how a car uses gas, it is not needed to maintain speed for orbit.
Answer:
The satellites move around the earth because of gravity which builds centripetal force allowing the satellite to stay in the orbit
Which of the following items is most sensitive to increased acidity in the environment?
concrete buildings
glass windows
railroad tracks
paved roads
Answer:
Concentrate buildings
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Tysm!
The distance record for someone riding a motorcycle on its rear wheel without stopping is more than 320000 m. Suppose the rider in this unusual situation travels with an initial speed of 8.00 m/s before speeding up. The rider then travels 40.0 m at a constant acceleration of 2.00 m/s2. What is the rider’s speed after the acceleration?
Answer:
v = 15.0 m/s
Explanation:
This is an exercise in kinematics in one dimension
v² = v₀² + 2 a x
in the exercise indicate that the initial velocity v₀ = 8.00 m / s
the distance traveled during acceleration is x = 40.0 m
let's calculate
v² = 8² + 2 2 40
v = √ 224
v = 14.97 m / s
v = 15.0 m/s
what is the use of inclined plane?
Answer:
A ramp
Explanation:
An inclined plane, also known as a ramp, is a flat supporting surface tilted at an angle, with one end higher than the other, used as an aid for raising or lowering a load. The inclined plane is one of the six classical simple machines defined by Renaissance scientists.
A solenoid with 35 turns per centimeter carries a current I. An electron moves within the solenoid in a circle that has a radius of 3.0 cm and is perpendicular to the axis of the solenoid. If the speed of the electron is 3.0 ✕ 105 m/s, what is I (in A)?
Answer:
The current of the solenoid is 0.0129 A.
Explanation:
The movement of the electron within the solenoid in a circle is produced by equaling the magnetic force and the centripetal force, as follows:
[tex] F_{B} = F_{c} [/tex]
[tex] e*v \mu_{0}*n*I = \frac{m*v^{2}}{r} [/tex]
[tex] I = \frac{m*v}{e* \mu_{0}*n*r} [/tex]
Where:
I: is the current
m: is the electron's mass = 9.1x10⁺³¹ kg
v: is the electron's speed = 3.0x10⁵ m/s
μ₀: is the permeability magnetic = 4πx10⁻⁷ T.m/A
n: is the number of turns per unit length = 35/cm
r: is the radius of the circle = 3.0 cm
e: is the electron's charge = 1.6x10⁻¹⁹ C
[tex]I = \frac{m*v}{e*\mu_{0}*n*r} = \frac{9.1 \cdot 10^{-31} kg*3.0 \cdot 10^{5} m/s}{1.6 \cdot 10^{-19} C*4\pi \cdot 10^{-7} T.m/A*3500/m*0.03 m} = 0.0129 A[/tex]
Therefore, the current of the solenoid is 0.0129 A.
I hope it helps you!
how does the half life of an isotope relate to the stability of its nucleus?
Answer:
The longer the half-life, the more stable the nucleus is.
Explanation:
Well, you know that nuclear half-life represents the time needed for an initial sample of a radioactive substance to be halved. If this is the case, a long half-life would imply that it takes a very long time for the nuclide to decay to half of its initial mass. This of cource means that it is very stable.
hope this helped c; if it did give me the brainlist please c;
Answer:
If the half-life is shorter the nucles is more unstable and vice versa
in most cases, letters of reconmendation are required for addmission to?
Answer:
Get your recommenders to mention diverse achievements. ...
Help your recommenders with relevant info. ...
The letter should always include examples of things you did. ...
The letter should show how you improved over time. ...
The tone of the letter should not be too dry.
what is the formula to calculate acceleration
Explanation:
your formula is here
hope it's helps u
Answer:
Im going to link a picture should help you better then me explaining
Explanation:
The following image represents the movement of a tsunami a giant wave produced by an earthquake at sea. Which type of model is represented in this image?
Large undersea earthquakes at tectonic plate borders frequently produce these amazing waves.
What is tsunami?When the ocean floor at a plate boundary suddenly rises or falls, the water above it is displaced, which causes the rolling waves that will constitute a tsunami to be launched.
In the "Ring of Fire" of the Pacific Ocean, a geologically active region where tectonic movements frequently cause earthquakes and volcanoes, the majority of tsunamis, or roughly 80% of them, occur.
Tsunamis move through the ocean at speeds of up to 500 miles per hour (805 kilometers per hour), which is comparable to a jet plane.
Therefore, Large undersea earthquakes at tectonic plate borders frequently produce these amazing waves.
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1. What is the mechanical energy (sum of PE +KE) throughout her trip? 2. Where is potential energy the highest? 3. Where is kinetic energy the highest? 4. Relationship statement: Height above ground to potential energy. As 5. Relationship statement: Speed (velocity) to kinetic energy. As
Answer:
1)50000J
2) At the start of the trip
3) At the end of the trip
4) The higher the height above the ground, the higher the potential energy
5) As speed increases, Kinetic Energy increase
Bears eat fruits such as berries and animals such as fish. They hibernate in the winter. They give birth to live young . Which of these terms apply to bears?
Answer:
Bears are consumers
Explanation:
The above statement shows that bears are consumers. A consumer is an individual or a party who plans to order or use acquired goods,
What is a consumer?A consumer is a person or a group who plans to order or utilize acquired goods, products, or services for personal, social, family, domestic, or similar purposes.
Any individual or group who is the final user of a product or service is referred to as a consumer.
A business that purchases a printer for internal usage. The firm that bought the printer is the client, and the employees that use it are the customers. The printer will not be resold by the firm.
Hence the statement shows that bears are consumers.
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How would you explain the fields of anatomy and physiology to one of your friends
Answer:
this may not help but :)))
Explanation:
Anatomy deals with the body's structure, different parts like cells, tissues, organs and organ system, etc. Physiology deals with the working of the body's part and their specific roles. ... The understanding of the physiology of a living organism is essential to know the function of every organ of the body.
A 90.0 kg person is sitting 1.00 m away from a 60.0 kg person at a football game. What is the gravitational force between them
Answer:
The force is [tex]36*10^-^9 N[/tex]Explanation:
According to newtons law on gravitation formula, which we are going to apply,
[tex]F= \frac{Gm1m2}{d^2}[/tex]
Where G represents universal gravitation constant, [tex]6.67*10^-^1^1 N.m^2/kg^2[/tex]
Given data
m1= 90 kg
m2= 60 kg
d= 1 m
Substituting our given data into the formula we have
[tex]F= \frac{6.67*10^-^1^1*90*60}{1^2}[/tex]
[tex]F= \frac{6.67*10^-^1^1*5.4*10^3}{1^2}\\\\F= 36*10^-^9 N[/tex]
The gravitational force between the two people in the football game is 3.6 * 10⁻⁷ N
Newton's law of gravitation states that the force between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
F = Gm₁m₂/r²
G is the gravitational constant = 6.67 * 10⁻¹¹ N.m²/kg, m₁ = first mass = 90 kg, m₂ = second mass = 60 kg, r = distance = 1 m
F = Gm₁m₂/r²
F = 6.67 * 10⁻¹¹ N.m²/kg * 90 kg * 60 kg / 1² = 3.6 * 10⁻⁷ N
The gravitational force between the two people in the football game is 3.6 * 10⁻⁷ N
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Perform the calculation and report your answer using sig figs. 657.70 - 26.543
Answer:
The answer is 631.157
Explanation:
The question requested that the answer to the subtraction of 26.543 from 657.70 must be written using significant figures.
Here are a few tips about how to Identify significant figures.
1) It should be noted that the number "0" is what is usually (but not always) affected while trying to identify significant figures. Hence, all other numbers/digits are always significant. For example, 26.543 has five significant figures.
2) The zeros found between these "other numbers/digits" are also significant. For example, 2202 has four significant figures.
3) In the case of a decimal, the tailing zeros or the final zero is also significant. 657.70 and 657.07 have five significant figures.
Now, back to the question
657.70 - 26.543 = 631.157.
Our final answer does not have a zero, hence all the digits (six) are significant.