You serve a volleyball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30 m/s. Calculate the energy.

The wavelengths for visible light rays correspond to which of these options A. About the size of a pen B. About the size of a virus or large molecule C. About the size of an amoeba D. Smaller than an atom E. About the size of a football field

Is it true or false that air pollution only occurs as a result of human activity

Find the acceleration of a train whose speed increases from 9 m/s to 22 m/s in 160 s.

how is your mindset related to your ability to embrace opportunities for self-improvement and learning?

What is the difference between a spring and a stream?

Imagine that you replace the block in the video with a happy or sad ball identical to the one used as a pendulum, so that the sad ball strikes a sad ball and the happy ball strikes a happy ball.

Under what conditions will an object experience a gravitational force? Under what conditions will an object experience an electric force? Under what conditions will an object experience a magnetic force?

A basketball player pushes down with a force of 34 N on a basketball that is inflated to a gauge pressure of 9 x 104 Pa. What is the diameter of contact between the ball! and the floor?

Match these terms with their definitions: 1. unit of electrical resistance ampere 2. unit of electromotive force or electrical potential ohm 3. unit for measuring the strength of an electric current volt 4. unit of electrical power watt

In which is momentum conserved: an elastic collision or an inelastic collision?