A rocket sled accelerates from 20.0 m/sec to 50.0 m/sec in 5.00 seconds. What is the acceleration of the sled?

Selma made a diagram to compare convection and radiation. which label belongs in the area marked x? must involve temperature differences between substances or objects only occurs when molecules are in direct contact involves the movement of fluids based on density differences can occur where there is little or no matter