Compared to white dwarf stars, neutron stars are-?

A. More abundant

B. Smaller

C. Less dense

D. Older

A 6.0-kg box slides down an inclined plane that slopes 39° to the horizontal. The box accelerates at a rate of 3.1 m/s^2. What is the coefficient of kinetic friction between the box and the surface of the inclined plane? 0.55 0.40 0.16 0.48

Energy released by fusion in the sun is initially in the form of

You're at rest in a hammock when a hungry mosquito sees an opportunity for lunch. A mild 2 m/s breeze is blowing.

Push a notebook or some other object so that it slides across a table or desktop. What force causes the notebook to start moving? What force causes the notebook to stop moving? If you don't know the name of the forces, just describe them.

Light from the sun reaches Earth in 8.3min. The speed of light is 3.00 x 10^8 m/s. How far is the Earth from the sun?

An ideal solenoid of length L, N windings, and radius b (L is much longer than b). A current I is flowing through the wire windings.

Determine the magnitude of the electric field at the surface of a lead-196 nucleus, which contains 82 protons and 114 neutrons. Assume the lead nucleus has a volume 196 times that of one proton and consider a proton to be a sphere of radius 1.

The convex len called converging lens

The emf produced in a generator is Vemf = 25 sin 377t. What is the frequency of rotation of the circular coil? 50 Hz 60 Hz 25 Hz 15 HZ

If a 1.0-kg-mass block is on the left cap, how much total mass must be placed on the right cap so that the caps equilibrate at equal height?