A particle with a half-integral spin is a

a. boson.
b. lepton.
c. fermion.
d. hadron.
e. muon.


c

Physics & Space Science

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Gravitational lensing of distant, faint irregular galaxies may be the key to:

A) mapping the dark matter. B) quasar energy production. C) understanding galactic rotation curves. D) understanding active galactic nuclei. E) determining galactic redshifts.

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The escape speed at the event horizon of a black hole is c, 300,000 km/sec

Indicate whether the statement is true or false

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Which of the following trips would consume more fuel for a given spacecraft?

1.a trip from the Earth to the Moon 2.a trip from the moon to the Earth 3.They both require the same amount of fuel. 4.It is impossible to determine.

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Gamma rays travel faster than visible light.

a. true b. false

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