An energetic child runs forward and backward. It's motion is shown on the following graph of horizontal position x vs time t

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?

Unpolarized light of intensity so passes through two sheets of polarizing material whose transmission axes make an angle of 60∘ with each other as shown in the figure. what is the intensity of the transmitted beam, st?

Two forces produce equal torques on a door about the door hinge. the first force is applied at the midpoint of the door; the second force is applied at the doorknob. both forces are applied perpendicular to the door. which force has a greater magnitude?