A mobile phone is 35% efficient. Over half an hour 11 kJ of energy is transferred to the phone. Calculate the amount of energy usefully transferred by the machine over half an hour.

Write the correct abbreviation for each metric unit

You are about to open a container of soy milk but notice that there are instructions to “shake well before serving.” the soy milk is most likely a

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