The percentage that is the true weight of the goods being marked up by the shopkeeper is 3.22%
What is mass?In physics, mass is a numerical value of inertia, a basic property of all matter. It generally refers to an object of matter in the universe opposition to change its speed or motion in answer to the force applied to it. Some examples of objects with mass include a table, a sofa, your bed, a baseball, a glass, and even air. The weight of an item defines that it is heavy or light.
Percentage change:
Wd=W′d ′
W( 61.8-1.01 )=W'( 61.8+1.01 )
W60.79=W'62.81
W'=W60.79/62.81
W'=0.9678W.
Now let find the percentage change as:
W-W'÷W 100%
=W-0.9678W÷W 100%
Percentage change=100%-96.78%
Percentage change=3.22%
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germanium is a matalloid. this means it has the same properties as a_ and a_
Germanium is a metalloid. this means it has the same properties as a metal and a nonmetal.
What is metalloid?In chemistry, a chemical element that forms a simple substance with properties in-between those of a conventional metal and a typical nonmetal is referred to as a metalloid.
The name is typically used to describe a collection of six to nine elements (boron, silicon, germanium, arsenic, antimony, tellurium, and maybe bismuth, polonium, and astatine) that can be found close to the main block of the periodic table, also known as the P-block.
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in a single-family dwelling, how is overcurrent protection for branch circuits required to be provided? see nec 210.20.
Having the circuit breakers or the fuses, also having the ampacity as well that shouldn't be less than overcurrent device to be rated.
A circuit breaker is an electrical safety device designed to protect an electrical circuit from damage caused by overcurrent. Its basic function is to interrupt current flow to protect equipment and to prevent the risk of fire. Unlike a fuse, which operates once and then must be replaced, a circuit breaker can be reset to resume normal operation.
Circuit breakers are made in varying sizes, from small devices that protect low-current circuits or individual household appliances, to large switchgear designed to protect high voltage circuits feeding an entire city.
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A beam of green light is made to pass through two slits that are 5. 0 x 10−3 meters apart. On a screen 4. 0 meters away from the slits, an interference pattern appears with bands of light separated by 4. 2 x 10−4 meters. What is the wavelength of the light?
3. 6 x 10−8 m
5. 9 x 10−7 m
5. 3 x 10−7 m
3. 9 x 10−6 m
The wavelength of the light is 5.3 x 10^-7 meters. So option C is correct.
It can be determined by the distance between the interference bands on the screen.
The formula for this relationship is: d = a * λ / L, where d is the distance between the bands, a is the distance between the slits, λ is the wavelength of the light, and L is the distance from the slits to the screen.
By plugging in the given values,
d = 4.2 x 10^-4 m, a = 5.0 x 10^-3 m, and L = 4.0 m, we can calculate λ. Solving for λ, we get λ = [tex]5.3 * 10^{-7[/tex] m.
Hence, the wavelength of the green light is [tex]5.3 * 10^{-7[/tex] meters.
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the reaction to the force in part b is a force of magnitude _____, exerted on the _____ by the _____. its direction is _____.
A. A downward force of magnitude 5 N is exerted on the book by the force of gravity.
B. An upward force of magnitude 5 N is exerted on the book by the table.
C. The reaction to the force in Part B is a force of magnitude 5 N, exerted on the table by the book. Its direction is downward.
According to Newton's third law of motion, the book exerts a force of 5 N on the table in a downward direction, and the table exerts an equal and opposite force of 5 N on the book in an upward direction. The upward force exerted by the table on the book is also 5 N, since the two forces are equal in magnitude and opposite in direction.
The reaction to the upward force exerted by the table on the book is a force of 5 N exerted by the book on the table in a downward direction, again in accordance with Newton's third law. The direction of this force is opposite to that of the upward force exerted by the table on the book.
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--The complete question is, A book weighing 5 N rests on top of a table.
A. A downward force of magnitude 5 N is exerted on the book by the force of
B. An upward force of magnitude _____ is exerted on the _____ by the table.
C. The reaction to the force in Part A is a force of magnitude _____, exerted on the _____ by the _____. Its direction is _____.--
there is an electric space heater that operates at 120v. two heating elements are used with resistances r1 and r2. they can be operated in parallel, series, or separately. the highest power setting is 1440w and the lowest is 320w. what are the values of r1 and r2? what are the intermediate power settings?
The values of R1 = 11.27 ohms and R2 = 60 ohms. P = 201.6W In this way, by adjusting the configuration of the heating elements and the resistance values, a range of power settings can be achieved.
A) To determine the values for R1 and R2, we need to first find the maximum and minimum current values for the heating elements. We can use Ohm's law to calculate the current, I, in the circuit:
I = V / R, where V is the voltage and R is the resistance.
For the maximum power setting of 1280W, we have:
I_max = P_max / V = 1280W / 120V = 10.67A
For the minimum power setting of 240W, we have:
I_min = P_min / V = 240W / 120V = 2A
To calculate the resistance of each heating element, we can use Ohm's law again:
R = V / I
For R1, using the maximum current value:
R1 = V / I_max = 120V / 10.67A = 11.27 ohms
For R2, using the minimum current value:
R2 = V / I_min = 120V / 2A = 60 ohms
B) The intermediate power settings can be achieved by varying the resistance of the heating elements. By connecting the heating elements in series or parallel, the total resistance of the circuit can be adjusted, which will change the current in the circuit and thus the power.
For example, to achieve a power setting of 720W, we can connect the heating elements in series, which will give us a total resistance of 11.27 + 60 = 71.27 ohms. Using Ohm's law, we can then calculate the current:
I = V / (R1 + R2) = 120V / 71.27 ohms = 1.68A
And the power:
P = I × V = 1.68A × 120V = 201.6W
In this way, by adjusting the configuration of the heating elements and the resistance values, a range of power settings can be achieved.
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We are designing an electric space heater to operate from 120VDC. Two heating elements with resistance R1 and R2 are to beused that can be operated in parallel, seperately, or inseries. The highest power is to be 1280W, and the lowestpower is to be 240W. Draw a cicuit diagram.
A) What are the values needed for R1 and R2?
B) What intermediate power settings are available?
a block weighing 55 lb is being pushed by a 13 lb force on a smooth surface. determine the acceleration of the block rounded to three significant figures.
On a flat surface, a 55 kg block is being dragged by something like a 13 lb force. The block accelerates at a rate of 7.64 feet per second.
What are example and force?As a response, the body's motion, shape, height, etc., could also alter. An alternative would be to firmly push or shove a door. Force is a vector quantity, hence it has a magnitude and direction. According to Newton's second law, pressure is the "service offering of a body's normal and acceleration."
What characteristics does force have?Therefore, the characteristics of columns of force are just that they begin at a positively charged ions and end at a negative charge, never cross, are proportionate to charge, and cannot pass through a conductor.
W = 55lb
m = w/g
g = 32.18 ft/s2
= 55/ 32.18
= 1.70 lbm
F = 13 lb
F = ma
13 = 1.70 * a
a = 7.64 ft/s2
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a student has built a 10-cm-long pinhole camera for a science-fair project. she wants to photograph her friend, who is 180 cm tall, and have the image on the film be 5 cm high. how far should the front of the camera be from her friend
The distance between both the student's friend and camera is d = 360 cm or 3.6 m.
What is the structure of light?Light not only moves in waves; it also moves with a flow of small particles. Scientists call these tiny particles of light as photons. The packets contain the energy which makes up the energy of the light. The scientists measure something called the relative energy for different types of light.
The light traveling in any one direction in a straight line is called a ray of light. Meanwhile, a group of light rays given out from a source is called a beam of light.
In this case, camera’s height was 10 cm.
The height of student's friend was 180 cm.
That picture on camera has a length of 5 cm.
Now, let d represent the space among both the friend and device's face. Its identical triangles as in figure attached show how the lengths were connected.
So, to find out the distance, we can use the following equation:
5 cm / 10 cm = 180 cm / d
d = 10 cm * 180 cm / 5 cm
d = 360 cm
d = 3.6 m
Hence, the distance among both the friend and device's face is 360 cm or 3.6 m.
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can the internal forces within a soccer ball produce an impulse on the soccer ball to change its momentum why or why not
The internal forces within a soccer ball can produce an impulse on the soccer ball to change its momentum. When the ball is struck by a player's foot, the internal forces within the ball cause it to compress and rebound.
What is the compress ?Compression is the process of reducing the size of a file or data set by encoding information using fewer bits. It is used to reduce the amount of data sent over a network or stored on a hard drive. Compression is generally done by compressing data into smaller data sets, which are then decompressed when needed. Compression can also be used to reduce the size of images, allowing them to be stored or transmitted more quickly. Compression algorithms such as lossless and loss can also be used to reduce the amount of data loss when transmitting or storing data.
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A system releases 300 J of heat and has 650 J of work done it by the surroundings. What is the change in the internal energy of the system
Change in internal energy of the system, that releases 300 J of heat and has 650 J of work done it by the surroundings is 350J
Internal energy U of a system or a body with well defined boundaries is the total of the kinetic energy due to the motion of molecules and the potential energy associated with the vibrational motion and electric energy of atoms within molecules. Internal energy also includes the energy in all the chemical bonds.
ΔU = change in internal energy
W = 650J (On System)
q = -300J
ΔU = q+W
ΔU = -300J+650J
= 350 J
Thus, the change in internal energy is 350J.
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the equation of a transverse wave on a string is the tension in the string is 29n. what is the wave speed? findthe linear density fo this string
Wave speed of transverse wave is a)30m/sec and the linear density of the string is 0.0322kg/m.
In physical science, a transverse wave is a wave whose motions are opposite to the heading of the wave's development. This is rather than a longitudinal wave which goes toward its motions. Water waves are an illustration of cross over wave.
A straightforward model is given by the waves that can be made on an even length of string by securing one end and moving the opposite end all over. One more model is the waves that are made on the layer of a drum. The waves engender in headings that are lined up with the layer plane, however each point in the actual film gets dislodged all over, opposite to that plane. Light is one more illustration of a cross over wave, where the motions are the electric and attractive fields, which point at right points to the ideal light beams that depict the bearing of engendering.
We know that wave speed is the ratio of angular frequency and string stiffness constant.
Here,we can see that angular freqnecy(ω)=600/sec and stiffness constant(k)-20m/sec.
So,wave speed=600/20=30m/sec.
Now,with this wave speed,we can find the linear density of string which is
linear density(μ)=T/v²=29/30²=29/900=0.032Kg/m.
Hence,wave speed and linear density are 30m/sec and 0.032kg/m respectively.
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(Complete question) is:
The equation of a transverse wave on a string is
y=(2.0 mm)sin[(20m⁻¹ )x−(600/sec )t]
The tension is the string is 29 N. (a) What is the wave speed? (b) Find the linear density of this string in grams per meter.
If temperature is a measure of kinetic energy of the molecules in a substance, why isn’t the temperature of two liters of boiling water twice as high as it of one liter?
Answer:
Temperature is not a measure of the total kinetic energy of all the molecules in a substance. Two liters of boiling water have twice as much kinetic energy as one liter. The temperatures are the same because the average kinetic energy of molecules in each is the same.
in which result do you have more confidence? that is, which velocity do you think is closer to the actual velocity? explain your reasoning.
Since the frequency from Part 1 is estimated from a heat energy that experiences some energy loss, it is predicted that it will be faster than the measured velocity.
Is the term "velocity" a vector term?
In essence, velocity is a vector quantity. It is the speed at which distance changes. It is the displacement change rate. A moving item can never move at a negative speed. A moving item can have zero velocity. Speed is a key indicator of an object's speed.
What are the values of time and velocity?
The speed and duration are 1.5 m/s and 100 seconds, respectively. Determine the displacement value. Remember that velocity equals displacement times time
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for a one-dimensional collision (vertical separation of centers is 0), how does increasing the mass of the red stone impact the final velocity of the red stone? the final velocity of the yellow stone?
When the mass of the red stone is increased in a one-dimensional collision (vertical separation of centers is 0), the final velocity of the red stone will decrease and the final velocity of the yellow stone will increase.
This is due to the conservation of momentum, which states that the total momentum of a system remains constant in the absence of external forces. In a one-dimensional collision, the total momentum before the collision is equal to the total momentum after the collision, meaning that if the mass of one object increases, then the velocity of the other object must decrease to ensure that the momentum of the system remains constant.
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a pitcher throws a 0.90 kg ball of clay at a 2.0 kg block of wood. the clay sticks to the wood on impact, and their joint velocity afterward is 1.4 m/s. what was the original speed of the clay (in m/s)?
The original speed of the clay was 6.06 m/s.
How to calculate the original speed ?We can use the conservation of momentum to solve this problem. The total momentum of the system before the collision is equal to the total momentum of the system after the collision:
m1v1 + m2v2 = (m1 + m2)v
where m1 and v1 are the mass and velocity of the clay, m2 and v2 are the mass and velocity of the wood block, and v is their joint velocity after the collision.
Substituting the given values, we get:
(0.90 kg) v1 + (2.0 kg) * 0 = (0.90 kg + 2.0 kg) * 1.4 m/s
Simplifying and solving for v1, we get:
v1 = (3.9 kg) * 1.4 m/s / 0.90 kg = 6.06 m/s (rounded to two decimal places)
Therefore, the original speed of the clay was 6.06 m/s.
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Mosa and Billy are picked up by a red blood cell, who takes them on their journey. What is the job of the red blood cell? What system is it a part of
To provide the cells with new oxygen and remove carbon dioxide. the circulatory system's component.
What connections exist between the circulatory and digestive systems?Before being circulated to other parts of your body for storage or use, the majority of the nutrients in your meal are absorbed in your small intestine. Nutrients are helped to cross the stomach lining and enter the bloodstream by a certain type of cell.
When Billy first enters the bed and breakfast, what does he see?Billy notices that he wants a BED and BREAKFAST first. He enters and notices a blazing FIRE, a baby grand piano, a large sofa, and cozy ARMCHAIRS. The dog and parrot, in his opinion, are symbols of friendliness and welcome.
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based on your observations from the simulation, how would you characterized the relationship of the gravitational force between a planet and its moon?
The relationship between the gravitational force between a planet and its moon can be characterized as a mutual attraction between two massive objects.
The force of gravity between the planet and its moon is proportional to the product of their masses and inversely proportional to the square of the distance between their centers. This means that the stronger the mass of the planet and its moon, the stronger their gravitational pull will be towards each other, and the farther apart they are, the weaker the force of gravity between them. The gravitational force between a planet and its moon creates the centripetal force that keeps the moon in its orbit around the planet. In this sense, the gravitational force between a planet and its moon can be seen as the underlying force that shapes the architecture of the solar system.
In addition to the gravitational force, other factors such as the planet's rotation and the presence of other bodies in the solar system can also influence the relationship between a planet and its moon. For example, the gravitational pull of other planets in the solar system can cause the moon's orbit to become unstable over time, potentially leading to significant changes in its orbit or even the formation of new moons.
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given to one significant figure, the current is 2 a. does this value fall within the 2% tolerance range?
yes, this value fall within the 2% tolerance range.
What does electrical tolerance mean?
The tolerance of a resistor's resistance measures how much off from its stated resistance you can anticipate the actual measured resistance to be. The tolerance for a gold tolerance band is 5%, for a silver tolerance band it is 10%, and for no band at all it is 20%.
The term "tolerance range" refers to the numerical range that is added to the "threshold value" to indicate the range where observed concentrations beyond the "threshold value" are acceptable due to known analytical error and do not undermine the compliance assumption. The range for the 2% tolerance is 2.20144927 A to 2.29130435 A. The current, which is given to one significant figure, is 2 A.
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what would liekly happen if a hot saturated solution of a solid were filtered either by vacuum or gravity filtration
If a hot saturated solution of a solid were filtered either by vacuum or gravity filtration, the solute begins to precipitate.
In the case of vacuum filtering with a Buchner funnel, a hot saturated solution would cool as it made contact with the funnel. The solution becomes less soluble at decreasing temperatures. Solute starts to precipitate as a result. The cooling process moves quite quickly.
The overall yield of the targeted product will suffer as a result. It is recommended against suction filtration of hot solutions that contain solvents with lower boiling points than water.
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which of the following statements about earth is correct? question 4 options: it is elongated. earth is the second largest planet in the solar system. the equatorial diameter is 42 km (26 mi.) greater than the polar diameter. earth is perfectly spherical.
The equatorial diameter exceeds the polar diameter by 42 km (26 mi).
Does the equatorial diameter exceed the polar diameter by 42 km?There is a 42 km disparity between the Earth's equator diameter of 12,756 km and its pole-to-pole diameter of 12,714 km.
Is the equatorial diameter of Earth greater than the polar diameter?Although it is more akin to an oblate spheroid, we frequently refer to it as a sphere.In other words, compared to a perfect sphere, Earth is flatter in the poles and wider in the middle.The distance between the poles is 12,713.6 kilometers.The diameter of the Earth at its equator is approximately 7926 miles (12,756 km), whereas its polar size is 7900 mile (12,714 km).
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how many peaks appear in the proton-decoupled 13c nmr spectrum of 2-methyl-2-butene?
The number of peaks in the proton-decoupled 13C NMR spectrum of 2-methyl-2-butene is three, and this reflects the three distinct carbon environments present in the molecule.
In nuclear magnetic resonance (NMR) spectroscopy, the number of peaks observed in a spectrum is related to the number of distinct chemical environments that the nuclei experience. The 13C NMR spectrum of 2-methyl-2-butene, a molecule with the chemical formula C6H12, can provide valuable information about the structure and bonding of the molecule. In this context, the question is asking how many peaks will be observed in the proton-decoupled 13C NMR spectrum of 2-methyl-2-butene.
Answer:
To determine the number of peaks in the proton-decoupled 13C NMR spectrum of 2-methyl-2-butene, we need to consider the different carbon atoms present in the molecule and the chemical environments they experience.
2-methyl-2-butene has six carbon atoms, labeled as C1 to C6 in the following diagram:
markdown
Copy code
H
|
H-C=C-C-H
| | | |
H H H H
| | | |
C2 C1-C3-C4-C5-C6
| | | | |
H H H H H
Carbon atoms C1, C3, and C4 are part of the main chain of the molecule and are all bonded to two other carbon atoms and one hydrogen atom. As a result, these carbon atoms experience similar chemical environments and will produce a single peak in the 13C NMR spectrum.
Carbon atoms C2, C5, and C6, on the other hand, are part of the methyl groups attached to the main chain. These carbon atoms are each bonded to three hydrogen atoms and experience a slightly different chemical environment compared to the carbon atoms in the main chain. As a result, these carbon atoms will each produce a separate peak in the 13C NMR spectrum.
Therefore, the proton-decoupled 13C NMR spectrum of 2-methyl-2-butene will show three peaks, corresponding to the three distinct carbon environments in the molecule.
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in parallel association, should the equivalent resistance be smaller or bigger than any individual resistor in the circuit? justify your answer.
The equivalent resistance is always less than the smallest resistor in the parallel network.
Then the inverse of the equivalent resistance of two or more resistors connected in parallel is the algebraic sum of the inverses of the individual resistances.
If the two resistances or impedances in parallel are equal and of the same value, then the total or equivalent resistance, [tex]R_t[/tex] is equal to half the value of one resistor. That is equal to R/2 and for three equal resistors in parallel, R/3, etc.
Note that the equivalent resistance is always less than the smallest resistor in the parallel network so the total resistance, [tex]R_t[/tex] will always decrease as additional parallel resistors are added.
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a 66-kg skier starts from rest at the top of a 1200-m -long trail which drops a total of 240 m from top to bottom. at the bottom, the skier is moving 11 m/s . part a how much energy was dissipated by friction?
The energy dissipated by friction is approximately 15,840 J.
The energy dissipated by friction can be calculated as the difference between the initial potential energy and the final kinetic energy.
The initial potential energy can be calculated using the formula:
PE_initial = mgh
where m is the mass of the skier, g is the acceleration due to gravity, and h is the height difference from the top to the bottom of the trail.
The final kinetic energy can be calculated using the formula:
KE_final = 0.5m[tex]v^{2}[/tex]
where v is the final velocity of the skier at the bottom of the trail.
Subtracting the final kinetic energy from the initial potential energy gives the energy dissipated by friction:
E_dissipated = PE_initial - KE_final
Using the given values, the energy dissipated by friction can be calculated as approximately:
E_dissipated = (66 kg)×(9.8 m/[tex]s^{2}[/tex])×(240 m) - 0.5×(66 kg)×[tex](11 m/s)^{2}[/tex] = 15,840 J.
Therefore, the energy dissipated by friction is approximately 15,840 J.
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a bicycle with 19-in.-diameter wheels has its gears set so that the chain has a 6-in. radius on the front sprocket and 4-in. radius on the rear sprocket. the cyclist pedals at 190 rpm. find the linear speed of the bicycle in in/min (correct to at least two decimal places)
The linear speed of the bicycle is approximately 14145.1 in./min if a bicycle with 19-in.-diameter wheels has its gears set so that the chain has a 6-in. radius on the front sprocket and 4-in. radius on the rear sprocket.
We can use the principle of similar triangles to find the linear speed of the bicycle.
Let's consider a single revolution of the front sprocket. During this revolution, the chain moves through an arc of 6 inches on the front sprocket and 4 inches on the rear sprocket. These two arcs form similar right triangles with the radius of the sprocket as the hypotenuse and half of the circumference of the sprocket as the other two sides.
So, the ratio of the length of the arcs is equal to the ratio of the radii of the sprockets:
Arc length on front sprocket / Arc length on rear sprocket = 6 in. / 4 in. = 3/2
Next, we can find the linear speed of the bicycle. We can start by finding the circumference of each wheel and then the linear speed of one revolution of the front sprocket.
Circumference of the front wheel = pi * 19 in. = 59.08 in.
Circumference of the rear wheel = pi * 19 in. = 59.08 in.
Linear speed of one revolution of the front sprocket = Circumference of the front wheel * Arc length on front sprocket / (2 * pi) = 59.08 in. * 6 in. / (2 * pi) = 74.49 in.
Finally, we can find the linear speed of the bicycle by multiplying the linear speed of one revolution of the front sprocket by the number of revolutions per minute made by the cyclist.
Linear speed of the bicycle = Linear speed of one revolution of the front sprocket * Cyclist's pedal rate (RPM) = 74.49 in. * 190 RPM = 14145.1 in./min
So, the linear speed of the bicycle is approximately 14145.1 in./min.
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If a nearsighted person has a far point df that is 3. 50m from the eye, what is the focal length f1 of the contact lenses that the person would need to see an object at infinity clearly? Express your answer in meters. If a farsighted person has a near point that is 0. 600m from the eye, what is the focal length f2 of the contact lenses that the person would need to be able to read a book held at 0. 350m from the person's eyes? Express your answer in meters
(-3.5 m) (-0.22man) The focal length f1 of the lenses contacts infinity clearly if a nearsighted person has a distant point df that is 3. 50 m from the eye.
What is focal distance vs focal length?The focal length of a lens, when focussed at infinity, is the distance between its rear nodal point and the focusing plane (where the camera's sensor is located). This is a characteristic of the lens that controls both the angle of vision and the perspective.
The focal length is the distance from the principal focus to the concave lens' optical centre.
The magnification at which a lens pictures far-off objects depends on its focal length. It is equivalent to the separation between the image plane and a pinhole that can capture distant objects that are the same size as the target lens.
Therefore, The sign convention dictates that the focal length of a concave lens always is negative.
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the velocity of a car traveling in the positive direction decreases from 40 m/s to 32 m/s in 5 seconds. what is the average acceleration of the car in this process?
The average acceleration of the car in the whole process is [tex]-1.92 m/s^2[/tex].
Acceleration is defined as the rate of change of velocity with respect to time. In this case, the velocity of the car decreases from 40 m/s to 32 m/s over a period of 5 seconds. To calculate the average acceleration, we can use the formula:
acceleration = (final velocity - initial velocity) / time elapsed.
Plugging in the given values, we get:
acceleration = (32 m/s - 40 m/s) / 5 s = [tex]-1.92 m/s^2[/tex].
This means that the average acceleration of the car is -1.92 m/s^2, indicating that it is slowing down. The negative sign indicates that the acceleration is in the opposite direction to the velocity of the car, which is traveling in the positive direction.
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How much work is done on a 45.6 kg rock that you lift 0.85 m?
Answer:
Therefore, the work done on the 45.6 kg rock that you lift 0.85 m is approximately 380.75 Joules.
Explanation:
The work done on an object is given by the formula:
work = force x distance x cos(theta)
where force is the applied force on the object, distance is the distance the object is moved, and theta is the angle between the force and the direction of motion. In this case, we can assume that the angle between the force and the direction of motion is zero degrees, since you are lifting the rock straight up.
The force required to lift the rock is equal to its weight, which is given by:
force = mass x gravity
where mass is the mass of the rock and gravity is the acceleration due to gravity, which is approximately 9.81 m/s^2 on the surface of the Earth.
Substituting the given values, we get:
force = 45.6 kg x 9.81 m/s^2 = 447.936 N
Now we can calculate the work done:
work = force x distance x cos(theta) = 447.936 N x 0.85 m x cos(0) = 380.7464 J
Therefore, the work done on the 45.6 kg rock that you lift 0.85 m is approximately 380.75 Joules.
according to newton's law of universal gravitation, if the moon were four times further from earth, the force by earth on the moon would:
According to Newton's Law of Universal Gravitation, if the Moon were four times further from Earth, the force by Earth on the Moon would be one-sixteenth (1/16) of the current gravitational force between the two bodies.
This is because the gravitational force between two objects is inversely proportional to the square of the distance between them. Therefore, as the distance between the Earth and the Moon increases, the gravitational force between them decreases.
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a 1500kg ferry boat has a momentum of 25000 kg-m/a. What is the speed of the ferry boat
The speed of the ferry boat is 16.67 meters per second.
The Pythagorean theorem is what?At a velocity of 10.0 m/s, the boat crossed the calm sea. Un = 2.00 m/s, river water speed Let v represent the ferry's effective river crossing speed, allowing it to travel directly to the location on the opposite side. We can then express their velocities as shown below.
What made Pythagoras well-known?Greek philosopher Pythagoras made significant contributions to mathematics, astronomy, and music theory. Although the Babylonians were aware of the theorem 1000 years before Pythagoras, he may be the first to use it.
We can use the formula for momentum:
p = mv
where p is momentum, m is mass, and v is velocity or speed.
Rearranging this formula to solve for velocity, we get:
v = p/m
Substituting the given values, we get:
v = 25000 kg-m/s / 1500 kg
v = 16.67 m/s
Therefore, the speed of the ferry boat is 16.67 meters per second.
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as the sun angle , the amount of energy reaching the surface . question 16 options: increases; decreases increases or decreases; remains constant increases; increases decreases; increases
As the sun angle decreases, the amount of energy reaching the surface decreases.
The sun angle refers to the angle between the sun and the horizontal surface. The higher the sun angle, the more direct the sun's rays are reaching the surface, which results in a higher amount of energy.
On the other hand, when the sun angle is lower, the sun's rays are more spread out and less direct, leading to a decrease in the amount of energy reaching the surface.
Additionally, the sun angle changes throughout the day as the earth rotates and also changes seasonally as the earth orbits the sun. Understanding the relationship between the sun angle and the amount of energy reaching the surface is important for various applications, including solar energy generation and building design to optimize energy use.
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Your question seems incomplete, but I suppose the question was:
"as the sun angle _______, the amount of energy reaching the surface ______.
question options: increases; decreases increases or decreases; remains constant increases; increases decreases; increases."
The asteroid or comet that killed the dinosaurs was probably about how large in diameter?
Thought to have been between 10 and 15 kilometers broad, the asteroid's speed during the encounter created the second-largest crater on the planet, which is now 150 kilometers in diameter.
Large, stony rocks called asteroids orbit the Sun. Their diameter ranges from a few to several hundred meters. A meteorite is any piece of an asteroid that survives impact with our planet. The most widely recognized idea for the catastrophic extinction at the end of the Mesozoic Era is the Alvarez hypothesis, which at first caused controversy.
Paul asserts, "Since we've located the crater, we have pretty strong evidence supporting an asteroid impact. It is currently mostly submerged on the ocean floor off the coast of Mexico.
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