Why is the reflection of a wave at a free boundary different from reflection at a fixed boundary?

3. If you hold a coin above your head while in a bus that is not moving, the coin will land at your feet when you drop it. Where will it land if the bus is moving at constant velocity? Explain why you said what you did.

What is a complete wave?

A teacher is demonstrating energy transformation with a basketball. He drops the ball from a fixed height and challenges his students to predict the height that the ball will bounce.

What is an example of density

What is the average speed of a car that traveled 300.0 miles in 5.5 hours?

A stretched spring has 5184 J of elastic potential energy and a spring constant of 16,200 N/m. What is the displacement of the spring?

A block of mass 1.3 kg is resting at the base of a frictionless ramp. A bullet of mass 50 g is traveling parallel to the ramp surface at 250 m/s. It collides with the block, enters it, and exits the other side at 100 m/s.

Metals are good thermal conductors - that is, when there is a temperature difference across their ends, they transfer energy very efficiently from the higher temperature end to the lower temperature end.

Some stars are so far away that their light hasn't reached Earth yet. A million years in the future, will the sources of light we see when we look up at night be the same? Why or Why not?

A sound wave travels through water. What best describes the direction of the water particles?