25. Which of the following samples of metals will displace the greatest volume of water (hint: solve for the 3 volumes)?
Sample 1 is 25 g of aluminum which has a density of 2.70 g/cm3.
Sample 2 is 45 g of gold which has a density of 19.3 g/cm3.
Sample 3 is 75 g of lead which has a density of 11.3 g/cm3.
aluminium
gold
lead
none of the above

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.