The calculated Schwarzschild radius of a 2-Mo black hole is approximately
a. 6 km.
b. 4 km.
c. 2 km.
d. 12 km.
e. 36 km.
a
RATIONALE: See equation on p. 240.
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In Figure 6-1, the block of mass m is at rest on an inclined plane that makes an angle ? with the horizontal. The normal force F acting on the block must be such that
A. F > mg cos?. B. F > mg sin?. C. F = mg cos?. D. F > mg. E. F = mg sin?.
What is the scientific community's view of the scientific value of astrology?
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What volume of water is displaced by a submerged 2.0-kg cylinder made of solid aluminum? (aluminum density = 2.7 × 10^3 kg/m3 and water density = 1.0 × 10^3 kg/m3)
a. 5.4E+3 m3 b. 7.4E–4 m3 c. 7.4E+2 m3 d. 5.4E–3 m3 e. 6.4E–4 m3
All pulsars are neutron stars; why is the reverse not true?
What will be an ideal response?