The force most responsible for holding the nucleus of an atom together is the:

a. force of attraction between protons and electrons
b. the force of repulsion of protons and electrons
c. the force of repulsion between protons and neutrons
d. the strong nuclear force of attraction between particles in the nucleus

Why is there friction between objects

Awheel rotates without friction about a stationary horizontal axis at the center of the wheel. a constant tangential force equal to 82.0 n is applied to the rim of the wheel. the wheel has radius 0.150 m . starting from rest, the wheel has an angular speed of 12.8 rev/s after 3.88 s. what is the moment of inertia of the wheel?

The a metal retainer that keeps the rolling elements evenly spaced. n a. seal n b. separator n c. bearing n d outer race