A 100 Kg man is diving off a 50 meter cliff. What is his kinetic energy when he is 20 meters from the water? a. 10,000 J
b. 19,600 J
c. 29,400 J
d. 49,000 J​

The place you get your hair cut has two nearly parallel mirrors 6.00 m apart. as you sit in the chair, your head is 2.00 m from the nearer mirror. looking toward this mirror, you first see your face and then, farther away, the back of your head. (the mirrors need to be slightly nonparallel for you to be able to see the back of your head, but you can treat them as parallel in this problem.) how far away does the back of your head appear to be?

Distinguish between a transverse wave and a longitudinal wave.

Identify the theory that can be used to explain each phenomenon. answers diffraction: wave theory interference: wave theory reflection: both particle and wave theories refraction: both particle and wave theories