List the following items in order of decreasing speed, from greatest to least: (i) A wind-up toy car that moves 0.15 m in 2.5 s. (ii) A soccer ball that rolls 2.3 m in 0.55 s. (iii) A bicycle that travels 0.60 m in 0.075 s. (iv) A cat that runs 8.0 m in 2.0 s. Knight, Randall D., (Professor Emeritus). College Physics (p. 28). Pearson Education. Kindle Edition.

Answers

Answer 1

Answer:

Answer:

(iii) > (ii) > (iv) > (i)

Explanation:

Part (i):

$\textrm{Speed of the wind-up toy} = \frac{\textrm{distance traveled}}{\textrm{Time taken}}\n\Rightarrow v_1=(0.15\ m)/(2.5\ s)\n\Rightarrow v_1 = 0.06\ m/s$

Part (ii):

$\textrm{Speed of the soccer ball} = \frac{\textrm{distance traveled}}{\textrm{Time taken}}\n\Rightarrow v_2=(2.3\ m)/(0.55\ s)\n\Rightarrow v_2 = 4.18\ m/s$

Part (iii):

$\textrm{Speed of the bicycle} = \frac{\textrm{distance traveled}}{\textrm{Time taken}}\n\Rightarrow v_3=(0.66\ m)/(0.075\ s)\n\Rightarrow v_3 = 8.8\ m/s$

Part (iv):

$\textrm{Speed of the cat} = \frac{\textrm{distance traveled}}{\textrm{Time taken}}\n\Rightarrow v_4=(8.0\ m)/(2.0\ s)\n\Rightarrow v_4 = 4.0\ m/s$

From the above calculations, we have

$v_3>v_2>v_4>v_1$

So, the speed in the parts mentioned arranged in decreasing order as follow:

(iii) > (ii) > (iv) > (i)

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Through which substance will sound travel fastest?
the ground
the ocean
the air

Answers

Sound waves travel fastest through the ground.

What is meant by a longitudinal wave ?

A longitudinal wave is a form of wave in which the medium vibrates parallel to the direction of the wave.

Here,

The displacement of the medium moves with the wave motion in the same direction.

Sound waves are longitudinal waves because, the direction of the energy transport is parallel to the oscillations of the sound waves.

Since, it is created by compressions and rarefactions in the air, sound waves are known as longitudinal waves. The air particles vibrate in a direction that is parallel to the direction of propagation.

The sound waves require a medium to propagate.

Solids and liquids have the quickest sound wave propagation rates, whereas gases have the slowest. Gases are very loosely packed while liquids are not as securely packed as solids. Sound moves through solids much more quickly than it does through gases due to the distance between the molecules.

Hence,

Sound waves travel fastest through the ground.

To learn more about longitudinal wave, click:

brainly.com/question/31377484

#SPJ2

Answer: The correct option is the ground.

Explanation:

Sound is a longitudinal wave. In longitudinal wave, the particles vibrate parallel to the direction of the propagation of the wave.

It needs medium to travel. It can travel in solid, liquid and gas.

Sound wave travels faster in solid in comparison to liquid.

It travels slowest in air.

Ground is a denser medium. Here, the sound wave travels faster in comparison to the ocean and the air.

Therefore, the correct answer is the ground.

Rate at which electric energy is converteto another form (2 words)

Answers

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List 3 examples behaviors of solid and the 3nwrgy associated with them

Answers

Answer:

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rigid - particles locked into place

not easily compressible

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Explanation:

Sure! Here are three examples of behaviors of solids and their associated energies:

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Energy: Solids possess potential energy due to the arrangement of their particles.

2. Behavior: Solids are rigid and maintain their shape when subjected to external forces.
Energy: Solids exhibit elastic potential energy when deformed and can store mechanical energy.

3. Behavior: Solids have a fixed melting point at which they transition to a liquid state.
Energy: Solids require thermal energy (heat) to overcome intermolecular forces and transition to a liquid state.

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Answers

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#pany. Image Credits: () OHM; (b) Rob Matheson
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ne
T
b

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Explanation:

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