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

Physics & Space Science

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Erosion performed by flowing water alone is known as

A. weathering. B. abrasion. C. hydraulic action.

Physics & Space Science

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

Physics & Space Science

What process limits a telescope's resolving power?

A. distraction B. reflection C. diffraction D. refraction

Physics & Space Science

"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.

Physics & Space Science