In what order were the following energy sources discovered by humans? Biomass energy was discovered first; then fossil fuels, then fuel cells
O Fossil fuels were discovered first, then fuel cells, then biomass energy
O fuel cells were discovered first; then fossil fuels, then biomass energy
Biomass energy was discovered first, then el cells, then fossil fuels

Ababy stroller is a rest on top of a hill which is 10 m high. the stroller and baby have a mass of 20 kg. what is the potential energy of the baby and stroller?

Describe uniform velocity and variable velocity in short

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?