A graduated cylinder contains water to the 15-cm'level. A stone was placed in the water, which rose to the 21-cm level. Then a cork stopper, with the same stone resting
on it so as to hold both submerged, was placed in the water. The water rose to the 26-
cmº level. What was the volume of the cork stopper, in cm"?
11
6
26
5
21

What color of light must blue light mix with to create white light? a. yellow b. white c. blue d. green

Astone is dropped with no initial velocity from the top of a cliff and hits the ground a time of 3.9 s later. what is the height of the cliff, in units of meters? you may assume that air resistance is negligible. give the answer as a positive number question 15 a figure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 200 o 20.9 12000 o 3.33

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?