3 years ago

What happens to the density of a substance as its temperature increases?

1 answer:

7 0

The molecules spread apart, so they take up more space. Because of this, they are less dense.

This means the density decreases as temperature increases.

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Which change would cause the largest increase in a mountain climber’s gravitational potential energy?

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<span>carrying twice the weight and climbing twice as high</span>

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4 years ago

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A mechanic uses a jack to lift up a car. He exerts a force of 11,000 N at a distance of 3m from the axis of rotation. How much t

pshichka [43]

Answer:

<h2>The amount of torque put on the car is 33,000Nm</h2>

Explanation:

Formula for calculating torque is expressed as T = rFsin $\theta\\$ where;

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$T = 3*11000sin90^{o} \\T = 3*11000 (sin90^{o} =1)\\T = 33000Nm$

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3 years ago

Select all of the statements that are true.

Strike441 [17]

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4 years ago

A car speeds up from 13 m/s to 23 m/s in 30 seconds. What is the

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acceleration of the car = 0.33 m/s²

Explanation:

To calculate the acceleration of the car we use the following formula:

acceleration = change in velocity / time

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