A ball, solid cylinder, and a hollow pipe all have equal masses and radii. If the three are released simultaneously at the top of an inclined plane, which will reach the bottom first?
A) ball
B) pipe
C) cylinder
D) they all reach bottom in the same time
A
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A merger between a small elliptical galaxy and a large spiral galaxy will most likely result in:
A) a large elliptical. B) a large spiral. C) a small elliptical and a large elliptical. D) a small elliptical and a large spiral. E) a small spiral and a large elliptical.
Leaving a hot oven door open in a closed room on a cool day
A) decreases room temperature. B) increases room temperature. C) doesn't affect room temperature.
The fusion reaction 
releases 17.6 MeV of energy. The mass of 2H is 2.01410 u, the mass of 4He is 4.00260 u, and the mass of 1n is 1.00866 u. What is the mass of 3H?
A. 2.99716 u B. 3.01605 u C. 3.03494 u D. 3.04221 u E. 2.99982 u
Tricia puts 66 g of dry ice (solid CO2) into a 2.0-L container and seals the top. The dry ice turns to gas at room temperature (20°C). Find the pressure increase in the 2.0-L container. (One mole of CO2 has a mass of 44 g and R = 0.0821 L•atm/mol•K. Ignore the initial volume of the dry ice.)
a. 6.0 atm c. 18 atm b. 12 atm d. 2.0 atm