What is true of a mechanical wave? @3.2. P. B5 @1

A)

It must travel in a vacuum

B)

It must have a medium.

C)

It must travel in empty space.

D)

Both sound and light are examples

A boy throws a ball into the air at 10.2 m/s. Assuming that only gravity acts on the ball, how high does it rise, in m?

What is the range of sound that Humans can hear?

Select all the correct answers. As a student, what steps can you take to reduce the amount of waste you make? Dispose of products after one use instead of reusing them. Recycle old books, newspapers, and magazines.

A 331 N stoplight is hanging in equilibrium from cables as shown. The tension in the right cable is 550 N, and it makes an angle of 12 degrees with the horizontal.

starla is making hot cocoa. She plans to multiply the recipe by 4 to make enough hot cocoa for the whole class l.

How do you know that a speedometer tells you the instantaneous speed of a car?

Margaret swam 100 meters in 5 minutes. What was her swimming speed? 100 meters per minute 50 meters per minute 20 meters per minute

A car traveled 112.0m in 24.500s, what was a car's average speed?

Hot coffee in a mug cools over time and the mug warms up. Which describes the energy in this system?

A mirror what a flat surface is a a.) convex mirror b.) concave mirror c.) plane mirror d.) virtual mirror