A ball rolls down a ramp for 15 seconds. If the initial velocity of the ball was 0.8 m/sec and the final velocity was 7 m/sec, what was the acceleration of the ball

How much power does an average person input into their body

A jet plane leaves the stratosphere and returns to the ground. How does the temperature outside the jet change during its descent through the troposphere? A. It decreases and then increases. B. It decreases steadily. C. It increases steadily. D.

Xavier throws a tennis ball to his friend Olaf at a 20° angle relative to the ground with an initial velocity of 18 m/s. The tennis ball travels 30 m until Olaf catches it.

What lead does to X rays?

A spring gun consists of a spring inside a plastic tube with spring constant, k. The spring can be compressed 20 cm from its equilibrium length. A 100 g hard plastic ball is then loaded into the tube.

You push a piano 5 meters across the floor with a force of 400 n. how much work have you done?

Monochromatic electromagnetic radiation illuminates an area of a surface. The electric and magnetic fields of the waves are then doubled in magnitude.

The measure of the force of gravity on an object, expressed as mass of the object times acceleration due to gravity is called

Which of the following jobs does not require good swimming ability

An object has an emissivity of 0.725. At temperature T, it radicates heat at a rate of 10 W. What is its rate of heat radiation at temperature 2 T