Brandon is trying to identify the type of metal that makes up four rectangular metal cubes. He has a cube of iron that has a mass of 15.6 g and a volume of 2.0 cm3. He determines the mass and volume of each unknown. Which unknown is most likely to be iron?
A. Unknown A
B. Unknown B
C. Unknown C
D. Unknown D

With i really need the correct answer!

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

What are the similarities & differences between a thermistor and a light dependent resistor in physics?