An object is placed 30 cm in front of a f=+15 cm lens. a lens f=-10 cm is placed 45 cm from the first lens. draw the 3 principal rays to explain the location of the final image.

If a sphere and a cure have the same mass and are propelled up a ramp with the same force, which would travel father up the ramp? explain.

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

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?