In a hydrogen atom, a transition occurs because nature does not like to be in a higher energy state.

Aballet student who learns with the of his instructor is demonstrating learning.

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.