An astronaut is planning a trip to a newly-discovered planet. According to the Law of Universal Gravitation the astronaut's weight on the planet will be greater than his weight on
Earth if:

Polly is pushing a box across the floor with a force of 30 n. the force of gravity is –8 n, and the normal force is 8 n. which value could describe the force of friction if polly could not move the box?

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?

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.