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

Two identical loudspeakers separated by distance d emit 200Hz sound waves along the x-axis. As you walk along the axis, away from the speakers, you don't hear anything even though both speakers are on.

A 50.0 kg woman climbs a flight of stairs 6.00 m high in 15.0 s. How much power does she use.

A ray of yellow light (f = 5.09 * 1014 hz) travels at a speed of 2.04 * 108 meters per second in

In major league baseball, the pitcher's mound is 60 feet from the batter. If a pitcher throws a 91 mph fastball, how much time elapses from when the ball leaves the pitcher's hand until the ball reaches the batter?

Stored energy is called

A falling skydiver opens his parachute. A short time later, the weight of the skydiver-parachute system and the drag force exerted on the system are equal in magnitude.

Consider the expression below. Assume m is an integer. 6m (2m + 18) Enter an expression in the box that uses the variable m and makes the equation true. (Simplify your answer completely. If no expression exists, enter DNE.)

What could be put into the center section of this Venn diagram?

Give two factors that will increase the magnetic field strength of an electromagnet

What is an example of total internal reflection at work?