Based on that circuit above, how would I solve for parts 3,4, and 5? Thank You

What is the orbital period of a spacecraft in a low orbit near the surface of mars? the radius of mars is 3.4×106m.

Aball is thrown horizontally from a cliff at 8m/s .in what direction is the ball moving 2s later?

The illuminance of a surface varies inversely with the square of its distance from the light source. if the illuminance of a surface is 120 lumens per square meter when its distance from a certain light source is 6 meters, by how many meters should the distance of the surface from the source be increased to reduce its illuminance to 30 lumens per square meter?