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Physics - Luna Linear Expansion/Heat Capacity Exam A Physics - Luna Linear Expansion/Heat Capacity Exam A An engineer is working on an innovative engine design. One of the moving parts, designed to operate at 150 degree C contains 1.2 kg of aluminum and 0.6 kg of iron. How much heat is required to raise the temperature from 20 degree C to 150 degree C? Blood can carry excess energy from the interior to the surface of the body, where energy is dispersed in a number of ways. While a person is exercising, 0.6 kg of blood flows to the surface of the body and releases 2000 J of energy. The blood arriving at the surface has the temperature of the body interior, 37 degree C. Assuming that blood has the same specific heat capacity as water, determine the temperature of the blood that leaves the surface and returns to the interior. 400 g sample of ethyl alcohol at 16 degree C is mixed with 400 g of water at 85 degree C in a 200 g aluminum calorimeter. Determine the final temperature of the mixture. In a physics lab experiment, a student immersed 100 copper pennies in boiling water (97 degree C). Each penny has a mass of 3 g. After the pennies reach thermal equilibrium with the boiling water, the students fished them out and dropped them into 200 g of water at 20 degree C. What is the final temperature?Explanation / Answer
3.
(1.2*900+0.6*448)(150-20)
= 175344 J
4.
37-2000/(0.6*4186)
= 36.2 oC
5.
.400*2400*(t-16) = .400*4186*(85-T)
T = 59.85 oC
6.
0.3*100*887*(100-T)= 0.2*4186*(T-20)
T = 97.56 oC
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