When we double the distance between a source of light and the surface on which it falls, the amount of illumination on the surface
decreases to
(what fraction) of the
original illumination.

What is the conversion factor between kg/m^3 and g/m^3. express your experimental values for the densities in kg/m^3.

Ten students stand in a circle and are told to make a transverse wave. what best describes the motion of the students? each student bumps the shoulder of his or her neighbor. at the exact time, all students take a step to the right. the students skip clockwise, going in a circular motion. one at a time, each student lifts his or her hands up and then down.

In addition to gravity, what is the other predominant force that affects the motion of a pendulum?