A spaceship is moving past us at a speed close to the speed of light. What would passengers on the spaceship conclude about our clocks?
A) Time is the same for everyone.
B) They would conclude that our clocks going faster than theirs.
C) They would conclude that our clocks going slower than theirs.
D) They would conclude that our clocks going at the same rate as theirs.
E) They can't see our clocks, but we can see theirs.
C) They would conclude that our clocks going slower than theirs.
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Size of the Nucleus: Calculate the estimated density of the nucleus of 
Sr? (mneutron ? mproton = 1.67 × 10-27 kg)
A. greater than 3.0 × 1020 kg/m3 B. 90 kg/m3 C. 2.1 × 1019 kg/m3 D. 2.0 × 1015 kg/m3 E. 2.3 × 1017 kg/m3
A 1.5m long dowel (a cylindrical rod) is pivoted about the end so that it is a pendulum of sorts - it can freely swing in a vertical plane. The dowel has a diameter of 2.0cm, and its density is 3.2 
When it is positioned in its swing such that its angle with the vertical is 22.5 degrees, what is the torque on the rod about the pivot due to its weight?
A. 17Nm B. 42Nm C. 11Nm D. 10Nm E. 44Nm F. 41 Nm
Which of the following would you expect to be very common in globular clusters?
A) high-mass main-sequence stars B) low-mass main-sequence stars C) supernova remnants D) x-ray binaries E) supergiant stars
A firecracker breaks up into several pieces, one of which has a mass of 200 g and flies off along the x-axis with a speed of 82.0 m/s. A second piece has a mass of 300 g and flies off along the y-axis with a speed of 45.0 m/s
What are the magnitude and direction of the total momentum of these two pieces? A) 361 kg•m/s at 56.3° from the x-axis B) 93.5 kg•m/s at 28.8° from the x-axis C) 21.2 kg•m/s at 39.5° from the x-axis D) 361 kg•m/s at 0.983° from the x-axis E) 21.2 kg•m/s at 56.3° from the x-axis