When vibrational motion in an object increases, which is a true statement?
a. kinetic energy, temperature, and thermal energy increase.
b. kinetic energy, temperature, and thermal energy decrease.
c. kinetic energy and temperature increase; thermal energy decreases.
d. kinetic energy and temperature decrease; thermal energy increases.

Which are examples of projectile motion? choose all that apply a. a soccer ball rolling across the ground in the northeast direction b. a car turning a corner, so it is heading south c. a javelin flying through the air d. a tennis ball lobbed over the net

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?