The first law of thermodynamics, E = Q-W what does the Q stand for?

Calculate the acceleration of a bus whose speed changes from 6 m/s to 12 m/s over a period of 3 s.

You drop two balls from a tower, one of mass m and the other of mass 3m. Just before they hit the ground, which ball, if either, has the larger kinetic energy? a. second b. first c. both balls have the same kinetic energy

Esmerelda may have a brain tumor. Her doctor will most likely use to view the tumor.

The hot gas lines need to be insulated? A never B always C if they are exposed to cold temperatures that could cause the refrigerant to condense in the line D for systems using hfc refrigerants

Which does not contain a lens? A. a floodlight B. eyeglasses C. a glass eye D. a jeweler's loop

A stick of length 1.3 m is held vertically with one end on the floor and is then allowed to fall. Find the speed of the other end when it hits the floor, assuming that the end on the floor does not slip.

calculating power reach each scenario and then answer the questions scenario a 120 j of work is done in 6 seconds scenario b 160 j of work is done at 8 seconds scenario c200 J's of work is done in 10 seconds which scenario uses the most power

Which of the following is not an assumption that scientists must make about the natural world

A small car meshes with a large truck in a head-on collision. Which of the following statements concerning the magnitude of the momentum change during the collision is correct?

An egg cooking on a campfire is an example of A. only an exothermic reaction. B. only an endothermic reaction. C. an endothermic and an exothermic reaction. D. neither an exothermic nor an endothermic reaction.