For an ideal gas of a given mass, if the pressure remains the same and the volume increases,
a. the average kinetic energy of the molecules decreases.
b. the average kinetic energy of the molecules stays the same.
c. the average kinetic energy of the molecules increases.
d. Nothing can be determined about the molecular kinetic energy.
c
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A 2000 kg car is traveling at 15.0 m/s down a long mountain grade of 2.0%. The mountain road is 5.0 km long. The heat generated at the brakes due to friction 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. 43 
B. 54
C. 83
D. 95
E. 117
________________ hypotheses involve a rare event in the origin of the solar system
Fill in the blank(s) with correct word
Explain what causes the mercury in the glass thermometer to rise and fall with a change in temperature
Smart Rocks are considered for
A. geologic dating B. ballistic missile defense C. nuclear power D. solar power