Light incident on a surface at an angle of 45° undergoes diffused reflection at what angle will it reflect?
a. only at angles less than 45
b. only at angles greater than 45
c. only at 45
d. at any angle between -90 & 90.
e. only at 0

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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.

What property of an object determines its inertia?

The protons in a nucleus are approximately 2 ✕ 10^−15 m apart. consider the case where the protons are a distance d = 1.93 ✕ 10^−15 m apart. calculate the magnitude of the electric force (in n) between two protons at this distance.