Which of the following effects is caused by atmospheric turbulence?
a) twinkling of stars
b) light pollution
c) magnification of images
d) diffraction of light

Which is not a characteristic of a heat pump? a. it is used in air conditioners. b. it uses a refrigerant. c. it requires no work. d. it reverses the normal flow of thermal energy.

What are the theoretical properties of a gas at a temperature of 0 kelvin?

Alarge box of mass m is pulled across a horizontal frictionless surface by a horizontal rope with tension t. a small box of mass m sits on top of the large box. the coefficients of static and