What aspect of the Sun's behavior wraps and distorts the solar magnetic field?
A) the differential spin between the equatorial and polar regions
B) sunspot activity due to differential heat dispersion
C) plasma fluxes within the core
D) the cycle of the reversal of the magnetic poles
Answer: A
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An insulated container, filled with water, contains a thermometer and a paddle wheel. The paddle wheel can be rotated by an external source. This apparatus can be used to determine:
A. specific heat of water B. relation between kinetic energy and absolute temperature C. thermal conductivity of water D. efficiency of changing work into heat E. mechanical equivalent of heat
Power: What is the power output in an ac series circuit with 12.0 ? of resistance, 15.0 ? of inductive reactance, and 10.0 ? of capacitive reactance, when the circuit is connected to a 120-V rms power supply?
A. 6.00 kW B. 3.21 kW C. 1.02 kW D. 4.49 kW
As a leaf grows, it becomes more organized. Does this process violate the law of entropy?
A) Yes; in fact, it is known that the law of entropy does not apply to biological processes such as the growth of a leaf, or biological evolution. B) No, because total energy is conserved in this process, despite the increased organization of the leaf. C) No, because the radiation passing through the leaf during this process increases its entropy, so that the total entropy increases. D) No, because the O2 that is emitted during photosynthesis has greatly increased entropy, resulting in an overall increase of the total entropy. E) No, because the sugars and other molecules of the leaf are formed at a high temperature, resulting in an overall increase of the total entropy.
A hunter on level ground fires a bullet at an angle of 10 degrees below the horizontal while simultaneously dropping another bullet from the level of the rifle. Which bullet will hit the ground first?
A) the one dropped B) the one fired C) both hit at the same time.