A ray of light traveling in diamond is incident on a block of sodium chloride at an angle of 20° from the normal. The angle of refraction of this ray in the sodium chloride is closest to A)
50°

B)
13°

C)
35°

D)
33°

What happens when chlorine reacts with bromine? a. electrons move from the chlorine atoms to the bromine atoms. b. electrons move from the bromine atoms to the chlorine atoms. c. electrons are shared between the chlorine atoms and the bromine atoms. d. electrons become delocalized among the atoms.

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical

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.