Applications to Astronomy: Four different main-sequence stars are colored blue, orange, red, and yellow. What is their rank from coolest to hottest?
A. blue, yellow, orange, red
B. orange, blue, yellow, red
C. red, orange, yellow, blue
D. red, yellow, orange, blue
Answer: C
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A 2000 kg car is traveling at 20.0 m/s and then puts on the brakes and comes to a complete stop. The heat generated at the brakes due to stopping heats up the brakes. The mass of the brake system is 20.0 kg and it has a specific heat of 0.200 kcal/kg 
What is the increase in the temperature of the brakes?
A. 75.3
B. 53.1
C. 23.9
D. 18.9
E. 12.4
In a closed system, the kinetic energy plus the potential energy is a constant
a. True b. False Indicate whether the statement is true or false
A 160 lb person has a mass of 160/32 = 5 slugs. A 160 lb person steps into an elevator and stands on a bathroom scale. Determine the scale reading for the given scenarios. The elevator accelerates upwards and is now moving at a constant speed
a. 150 lb c. 170 lb b. 160 lb d. none of the above
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