PLEASE HELP ASAP!!
for how many seconds would a force of 8.00 N have to act on a 2.00 kg mass in order to change its velocity from 2m/s to 7m/s?

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

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

Need only answer if you think you know it