For an LC circuit, when the charge on the capacitor is A. one-half of the maximum charge.
B. the energy stored in the capacitor is one-half of the total energy.
C. twice the total energy.
D. equal to the total energy.
E. one-eighth of the total energy.
F. one-quarter of the total energy.

If you put a helium-filled balloon in the refrigerator, what will happen?

The first law of thermodynamics states that heat added to a system is neither created nor destroyed but is as it changes into other forms of energy.

Engines for propeller-driven aircraft are limited in their maximum rotational speed by the fact that the tip speed of the propeller must not approach the speed of sound in air (mach i). taking 6 ft as a typical diameter for a propeller of a light airplane and 1100 fils as the speed of sound, find the upper limit on the rpm (revolutions per minute) of the propeller shaft.