Explain why if charge cannot be created or destroyed, electrically neutral objects can become electrically charged

Explain what happens to the pitch of a cell phone ring when the amplitude of a sound wave increases. Justify your reasoning using complete sentences and key vocabular

When white light is passed through a prism, it will be reflected back to the viewer be blocked by the prism disperse into the separate colors of the visible light spectrum?

You push a cart with mass 20 kg forward, giving it an acceleration of 2 m/s2. How much force did you apply?

Suppose you push horizontally with precisely enough force to make the block start to move, and you continue to apply the same amount of force even after it starts moving. Find the acceleration a of the block after it begins to move.

What is found by multiplying frequency by wavelength?

A 7700-kg box car traveling at 14 m/s strikes a second car at rest. The two stick together and move off with a speed of 5.0 m/s. What is the mass of the second car?

What will happen if there is a change in a magnetic field?

Question 2 10 pts The voltage in a particular circuit is 10.0 V. The current in the circuit is 20 A. What is the resistance? A. 2.0 B. 30 C. 200 D. 0.5

Where in the motion is the magnitude of the net force on the object a maximum? where in the motion is the speed a maximum?

Which movies are longer than 2 hours?