Trey and Abbey are skating. When stopped, Abbey pushes Trey, whose mass is 60.0 kg, with a force of 15.0 N. What is Trey’s velocity after 4.0 s? Show work plz, im completly lost on this question

Rohit is trying to tune an instrument

Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.

If the area of a square has increased by a factor of 16, by how much has each side increased?