At what point in the light curve below is the cooler star in front of the hotter star of an eclipsing binary system?
?
a. 1
b. 2
c. 3
d. 4
e. 5
D
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Mercury has a density of 13,600 
The column of mercury that would produce a pressure of 
is
A. 32.120 in. B. 29.920 in. C. 25.430 in. D. 19.800 in. E. 9.8000 in.
The acceleration due to gravity is 10 m/sec2. If an object falls from rest, its instantaneous speed at the end of the fifth second is (neglecting air resistance)
A) 10 m/sec. B) 5 m/sec. C) 100 m/sec. D) 50 m/sec. E) impossible to determine from the given information.
A 4.0-kg mass is placed at (3.0, 4.0) m, and a 7.0-kg mass is placed at (3.0, -4.0) m. What is the moment of inertia of this system of masses about the x axis?
a. 275 kg•m2 b. 90 kg•m2 c. 176 kg•m2 d. 99 kg•m2
Specific Heat: A 4.0-kg aluminum block is originally at 10°C. If 160 kJ of heat is added to the block, what is its final temperature? The specific heat capacity of aluminum is 910 J/kg ? K.
A. 24°C B. 34°C C. 44°C D. 54°C