The radius of Mars may be taken to be 3,390 km. Assume a satellite is in orbit 200
km above Mars, so r = 3,590 km. What is the
circular velocity, Vw, of the orbit of the satellite
around Mars?
Vm = [ ? ] km/s
Hint: The acceleration of gravity near the
surface of Mars is 3.71 m/s2,

Copper has free electrons per cubic meter. a 71.0-cm length of 12-gauge copper wire that is 2.05 mm in diameter carries 4.85 a of current. (a) how much time does it take for an electron to travel the length of the wire? (b) repeat part (a) for 6-gauge copper wire (diameter 4.12 mm) of the same length that carries the same current. (c) generally speaking, how does changing the diameter of a wire that carries a given amount of current affect the drift velocity of the electrons in the wire?

Idon’t quite understand this problem

The two required components for a generator