Compared to the event horizon, the photon sphere of a black hole is

A. nearer the singularity.
B. farther from the singularity.
C. at the same location.


Answer: B

Environmental & Atmospheric Sciences

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How distinct were Mesozoic mammals from their reptile neighbors?

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Globally, aquaculture produces about ________ percent of fish consumed by humans.

A. 24 B. 2 C. 38 D. 12 E. 50

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Wood floats in water and rocks sink; thus, the density of ________ is the lower of the two

Fill in the blank(s) with correct word

Environmental & Atmospheric Sciences