3 years ago

What is it called when I sound waves slowed buy a new medium

Physics

1 answer:

statuscvo [17]3 years ago

6 0

Answer:

YFUYFYUULCFTYCTULYFUY

Explanation:

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Mechanical Energy transforms into Thermal due to the moving parts rubbing on eachother creating heat and friction.

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Why does a skateboard coasting on a flat surface slow down and eventually comes to a stop

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4 years ago

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A 20-kg child is on top of a slide was pushed down by his brother giving him an initial speed of 2 m/s down the slide. what is t

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3 years ago

Suppose all of the apples have a mass of 0.10 kg. If apple (A) is sitting on the ground, what is its potential energy?

nekit [7.7K]

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3 years ago

A toy car of mass 8 kg initially moves with a speed of 5 m/s. How much work must be done on the car to increase its speed to 10

sukhopar [10]

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300 J

STEP-BY-STEP EXPLANATION:

To know the work required, we must calculate the work in both cases, the difference would be the amount of work necessary for the speed to increase. The work done is the same as the amount of energy increase. The formula for kinetic energy is:

$\frac{1}{2}m\cdot v^2$

We calculate in each case:

$\begin{gathered} \frac{1}{2}\cdot8\cdot10^2=400\text{ J} \\ \frac{1}{2}\cdot8\cdot5^2=100\text{ J} \end{gathered}$

We calculate the difference between the two to find out the work required:

$400-100=300\text{ J}$

The work required is 300 J

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2 years ago