four cube-shaped blocks are floating in equilibrium in a tank of water. blocks a, b, and c have the same size. block d is larger than the others. the masses of the blocks are unknown.

Explain why electric current cannot exist if a current doesn't have a voltage source.

Ways that industry and agriculture use physical properties to separate substances

In a heat engine if 1000 j of heat enters the system and the piston does 500j of work, what is the final internal energy of the system if the inital energy was 2000 j1.write the equation2.list out your known variables 3. plug the numbers into the equations4.solve 5.write your solution statement that includes initial energy and final energy added.