A boy and his skateboard have a combined mass of 65KG what is the speed of the boy and skateboard if they have a momentum of 275 KG times M/s

The current in a hair dryer measures 11 amps. the resistance of the hair dryer is 12 ohms. what is the voltage?unit:

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

Need asap ‼️ 20 pts which gravitational force field diagram is drawn correctly? (answers in pictures below)