After the sun exhausts its nuclear fuel, its ultimate fate will be to collapse to a white dwarf state. in this state, it would have approximately the same mass as it has now, but its radius would be equal to the radius of the earth.

(a) calculate the average density of the white dwarf.
kg/m3

(b) calculate the surface free-fall acceleration.
m/s2

(c) calculate the gravitational potential energy associated with a 3.91-kg object at the surface of the white dwarf.
j

What is the radius of the circular path ofa charged particle in a magnetic field?

What properties of a moving object are used in determining the object's energy of motion

At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius ρa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature ρr of its path, both as observed by the nonrotating skydiver.