Which of the following statements is true? Heavier objects will free-fall more quickly than lighter objects Mass and weight are the same Objects in free-fall do not experience air resistance The more massive an object, the faster its acceleration of gravity.

Agas contained within a piston-cylinder assembly undergoes three processes in series: process 12: compression with pv= constant from 1 bar and 1 liter to 4 bar. process 23: constant pressure expansion to 1 liter. process 31: constant volume calculate the pressure and volume at each state, and sketch the processes on a p-vdiagram labeled with pressure and volume values at each numbered stat

Which of the following is the main energy source for the sun? a. fission of hydrogen b. fusion of hydrogen c. fusion of helium d. fission of iron

Heterogeneous mixture with larger particles that never settle is