How to find the force.

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

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.