You are building a race car. your goal is to have a car that can go from 0 miles per hour to 80 miles per hour in 2 seconds. you are focusing on the car's
a. speed.
b .acceleration.
c. deceleration.
d. velocity.

This question is worth 54 points ! rock falls from a ledge to the ground what energy conversion occurs during this process a potential to kinetic b kinetic to potential c thermal to mechanical d chemical to mechanical

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

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.