Compared with the buoyant force of the atmosphere on a helium-filled balloon, the buoyant force of the atmosphere on a nearby wood block of the same volume is
A) considerably less.
B) considerably more.
C) the same.
Answer: C
Physics & Space Science
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What is the total energy of an electron moving with a speed of 0.950c? (c = 3.0 × 108 m/s, mel = 9.11 × 10-31 kg)
A) 2.6 × 10-13 J B) 8.2 × 10-14 J C) 1.1 × 10-13 J D) 1.2 × 10-14 J
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The canals of Mars were eventually found to be crustal faults
Indicate whether the statement is true or false
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The 3 K background radiation is just the redshifted gamma wavelength radiation of the decoupling
Indicate whether the statement is true or false
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When an object is solely under the influence of conservative forces, the sum of its kinetic and potential energies does not change
A) True B) False
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