A 1.0 kg brick falls off a ledge of height 44 m and lands on the ground. Find the final velocity of the brick using conservation of
energy.
9.8 m/s
20.3 m/s
29.4 m/s
38.2 m/s

Why do electron microscopes have higher resolving power than light microscopes?

The 5-kg cylinder is initially at rest when it is placed in contact with the wall b and the rotor at a. if the rotor always maintains a constant clockwise angular velocity v = 6 rad> s, determine the initial angular acceleration of the cylinder. the coefficient of kinetic friction at the contacting surfaces b and c is mk = 0.2.

The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?