A book with a mass of 1.8 kg sits on a bookshelf. If it has a gravitational potential energy of 42 J, how high is the shelf? The acceleration of gravity is
9.8 m/s2
O A. 2.1 m
OB. 1.6 m
O C. 0.9 m
OD. 2.4 m

Look at the potential energy diagram for a chemical reaction. which statement correctly describes the energy changes that occur in the forward reaction?

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

Asher cycles 12 miles in 16 hours. what is his speed?