A piece of iron of arbitrary shape is immersed in the mixture of mercury and an unknown liquid. It is found that 46% of the iron volume is the unknown liquid, and the remaining 54% is in mercury. The density of iron and mercury are 7.8X103 kg/m3 and 13.6X103 kg/m3 respectively. What is the density of the unknown liquid

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