An artist working on a piece of metal in his forging studio plunges the hot metal into oil in order to harden it. the metal piece has a mass of 54 kg and its specific heat is 0.1027 kcal/(kg · °c). he uses 810 kg of oil at 35°c. the specific heat of oil is 0.7167 kcal/(kg · °c). once the metal is immersed in the oil, the temperature reaches an equilibrium value of 39°c. how hot was the forged metal piece just before he plunged it into the oil?

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

John throws .4 kg ball with velocity of 18 m/s. hits .2 kg bottle and bottle flies 25 m/s. how fast is ball traveling after hitting the bottle?

Thomas his older brothers, who own a junk yard, on the weekends to earn extra money. he likes to them push broken-down cars to the back of the junk yard because it makes him feel strong. last saturday, they pushed three cars with different weights, and he noticed he used different amounts of force for each one. the cars were the following weights: white car: 2,700 kg red car: 1,500 kg blue car: 2,100 kg think about how much force is needed to move each car. which correctly lists the cars in order from the most to least amount of force needed to move them? a) white, blue, red b) blue, red, white c) red, white, blue d) white, red, blue