Lee Smolin suggests that a new universe is born inside
A. every neutron star
B. every star
C. every universe
D. every supernova
E. every black hole
Ans: E. every black hole
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When you blow some air above a paper strip, the paper rises. This happens because
A) the air above the paper moves slower and the pressure is higher. B) the air above the paper moves faster and the pressure is lower. C) the air above the paper moves faster and the pressure is higher. D) the air above the paper moves slower and the pressure is lower. E) the air above the paper moves faster and the pressure remains constant.
An 800-MW electric power plant has an efficiency of 30%. It loses its waste heat in large cooling towers. Approximately how much waste heat (in MJ) is discharged to the atmosphere per second?
a. 1 200 b. 1 900 c. 800 d. 560 e. 240
Exclusion Principle: Consider ground-state helium having two electrons in orbit. If one of the electrons has quantum numbers (n, ?l, m1, ms) of 1, 0, 0, -1/2 respectively, the quantum numbers for the other electron will be
A. 1, 1, 0, -1/2. B. 1, 0, 0, +1/2. C. 1, 1, 1, +1/2. D. none of the given answers.
A swimmer heading directly across a river 200 m wide reaches the opposite bank in 6 min 40 s. She is swept downstream 300 m. How fast can she swim in still water?
A) 1.24 m/s B) 1.83 m/s C) 0.50 m/s D) 1.42 m/s E) 0.25 m/s