Four small 0.2 kg spheres, each of which you can regards as a point mass, are arranged in a square 0.400 m on a side and connected with very light rods with negligibly small mass. find the moment of inertia of the system about an axis through the center of the square, perpendicular to its plane at point o. enter the result in units kg*m/s2.

Complete these sentences. if a roller coaster train has a potential energy of 1,500 j and a kinetic energy of 500 j as it starts to travel downhill, its total energy isj. once the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 j, and its potential energy decreases to j. when the train reaches the bottom of the track and is traveling along the ground, its kinetic energy isj.

Abeam of electrons moves at right angles to a magnetic field of 4.5 × 10-2 tesla. if the electrons have a velocity of 6.5 × 106 meters/second, what is the force acting on the electrons? the value of q = -1.6 × 10-19 coulombs.

The inverse square law applies to: intensity of sound gravitational force intensity of light electric force magnetic force