An object is located 5.0 cm from a convex lens. the lens focuses light at a distance of 10.0 cm. what is the image distance? use the equation attached. a.-10.0 cmb.10.0c.3.33cmd.-3.33cm

Agroup of students were investigating the force of gravity. they began by dropping a foam ball from a height of 3 meters into a bucket of sand. the ball hit the sand in 0.306 seconds. they dropped additional balls of approximately the same diameter, but of different masses. here is the data they collected. based on this experiment and the collected data, what would their conclusion be?