A 5-g coin is dropped from a 300-m building. If it reaches a terminal velocity of 45 m/s, and the rest of the energy is converted to heating the coin, what is the change in temperature (in °C) of the coin? (The specific heat of copper is 387 J/kg×°C.)
a. 9
b. 2
c. 5
d. 21
e. 0.5
C
Physics & Space Science
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According to the second law of thermodynamics, for any process that may occur within an isolated system, which answer applies?
A. entropy remains constant. B. entropy increases. C. entropy decreases. D. depends on the rate of change of the process.
Physics & Space Science
With volume and molar quantity held constant, by what factor does the absolute temperature change for an ideal gas when the pressure is three times bigger?
a. 0.3 c. 5.0 b. 3.0 d. 25.0
Physics & Space Science
Most of the new star formation in the Galaxy is found in the
A) halo. B) spiral arms. C) bulge. D) Galactic center. E) globular clusters.
Physics & Space Science
Power is a vector quantity
Indicate whether the statement is true or false
Physics & Space Science