Suppose our Sun were suddenly replaced by a supergiant star. Which of the following would be true?

A) Earth would be inside the supergiant.
B) The supergiant's surface temperature would be much hotter than the surface temperature of our Sun.
C) Earth would fly off into interstellar space.
D) The supergiant would appear as large as the full Moon in our sky.


A) Earth would be inside the supergiant.

Physics & Space Science

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Which object is likely to be the coldest? The object whose light spectrum is brightest in the

A -visible light.
B -ultraviolet.
C -infrared.
D -X-rays.

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Einstein's theory of relativity is based in part on which one of the following postulates?

a. Speed of light in a vacuum is same for all observers regardless of source velocity. b. Energy is conserved only in elastic collisions. c. Space and time are absolutes. d. Mass and energy are equivalent.

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To help determine the age of rock layers over a large area we can use the principle of

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