Suppose you put in 100 j of work on a lever and get out 93 j of work. what is the efficiency of the lever and how much of the work input is lost as heat in joules?

A paratrooper whose parachute fails to open lands in snow; he is hurt slightly. Had he landed on bare ground, the stopping time would have been 10 times shorter and the collision lethal.

Mass is most closely related to an objects weight? Size? Shape or temperature?

Which of the following will cause an increase in gas pressure in a closed container? A. Reducing the volume B. Adding more gas C. Both B. and C.

The atomic mass of an atom (in amu) is equal to

Name three elements that are good conductors of heat

Difference between Heterozygous and homozygous?

A wave has a speed of 50 m/s and a frequency of 10 Hz. Calculate its wavelength.

A conservative force acts on a particle. We can conclude: A. The work done by the force on the particle depends only on initial and final position. B. The force must be constant. C. The particle cannot change direction. D.

Which action is caused by gravity? a frost wedging b aeolian bands c mass wasting d glaciation

A light beam is directed parallel to the axis of a hollow cylindrical tube. When the tube contains only air, the light takes 8.72 ns to travel the length of the tube, but when the tube is filled with a transparent jelly, the light takes 1.