The moon Phobos orbits Mars (mass = 6.42 x 1023 kg) at a distance
of 9.38 x 106 m. What is its period of
orbit?
[?]s

Why there is no inductive reactance in dc circuits

A2-kg bowling ball is 2.5 meters off the ground on a post when it falls. just before it reaches the ground, it is traveling 7 m/s. assuming that there is no air resistance, which statement is true?

Two light bulbs each having a resistance of 3ohms are connected in series to a battery marked 12 volts. how much current will flow in the circuit