How do mirrors and lenses compare in their interaction with light? A. Mirrors spread light apart; lenses do not.
B. Mirrors bounce light from their surfaces; lenses do not.
C. Mirrors bend light as it passes through; lenses do not.
D. Mirrors bring light to a point; lenses do not.

Who was the first scientist to measure speed as distance over time?

An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.

Friction removes energy from objects in motion. which statement best describes how this works? a) friction transforms ke into thermal energy b) friction transfers thermal energy to ke c) friction transforms te into pe d) friction transforms pe into ke e) friction transfers ke into pe