Through which type of material does sound tend to travel at the highest speed?
A. Sound travels at the same speed in every material
B. Solids
D. Liquids

Which is not one of the major climate zones? question 3 options: rain forest polar tropical temperate

Complete these sentences. if a roller coaster train has a potential energy of 1,500 j and a kinetic energy of 500 j as it starts to travel downhill, its total energy isj. once the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 j, and its potential energy decreases to j. when the train reaches the bottom of the track and is traveling along the ground, its kinetic energy isj.

Language is not the only way that humans communicate. describe how we use sound, touch, chemicals, and sight to communicate. need answer asap