The value of g at the surface of the spherical Asteroid X is 0.0060 m/s2 and the escape velocity is 10.1 m/s. What is the mass of this asteroid? (G = 6.67 × 10-11 N ? m2/kg2 )
A) 2.3 × kg
B) 3.5 × kg
C) 6.5 × kg
D) 4.9 × kg
E) 6.7 × kg
C
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A 2.00 kg mass is located at (4.00 m, 0.00 m, 0.00 m) and a 4.00 kg mass is located at (0.00 m, 3.00 m,0.00 m). If this system of masses rotated about the X-axis perpendicular to the Z-Y plane, then the moment of inertia of this system is
A. 23 kg 
B. 28 kg
C. 33 kg
D. 36 kg
E. 41 kg
The oxygen in Earth's atmosphere
a. was manufactured inside stars. b. was added to the atmosphere by plant life. c. has grown more abundant since the origin of Earth. d. all of these e. none of these
Potassium-40, one of the six major radionuclides used for radiometric dating, decays to
a. nitrogen. b. strontium. c. lead. d. argon.
Pu is unstable. Which of the following nuclei might be a possible outcome of a single-step decay process from this nucleus?
A. 
B. 
C. 
D. 
E. 