Does 10 ohm and 20 ohm equal 30 ohms

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

What was the first instrument to ever record an earthquake?

What happens to an isotope during radioactive decay?