The Sun produces its energy through ________.
A. the fusion of neutrinos into helium
B. electric currents generated in its core
C. gradual gravitational collapse
D. the fusion of hydrogen into helium
E. the fusion of helium into hydrogen
Answer: D
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Erosion performed by flowing water alone is known as
A. weathering. B. abrasion. C. hydraulic action.
What process limits a telescope's resolving power?
A. distraction B. reflection C. diffraction D. refraction
Find the speed of an ocean wave whose vertical displacement y as a function of time t is given by y(x,t) = 3.7 cos(2.2x - 5.6t), where all quantities are in SI units
A) 2.5 m/s B) 1.9 m/s C) 3.5 m/s D) 4.5 m/s
"An external pressure applied to an enclosed fluid is transmitted unchanged to every point within the fluid" is known as
A) Archimedes' principle. B) Bernoulli's principle. C) Torricelli's law. D) Pascal's principle. E) Fermat's principle.