Which of the following has greater number of hydrogen molecule ? 9 gm of CH4 or 10gm of NH3

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

Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above

A10 kg box initially at rest is pulled 18 meters across a horizontal, frictionless surface by a 40 n force. what is the block’s final velocity over the 18 meters?