If the Sun instantaneously turned into a black hole of one solar mass, what would happen to the Earth?


earth would continue orbiting the black hole

Physics & Space Science

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The air at the beach is the same temperature everywhere, but you feel cooler under a beach umbrella because

A. solar radiation is not heating up your skin. B. the sand underneath you cools off more rapidly than the water vapor in the air. C. the umbrella gets hot, which thereby cools off the air underneath it. D. a convection cell forms under the umbrella, thereby cooling you off.

Physics & Space Science

A 16-nC charge is distributed uniformly along the x axis from x = 0 to x = 4 m. Which of the following integrals is correct for the magnitude (in N/C) of the electric field at x = +10 m on the x axis?

A.


B.

C.

D.

E.
none of these

Physics & Space Science

If an operatic aria lasts for 5.75 min, its length expressed in seconds is x s, where x is

A) less than 5.75. B) greater than 5.75.

Physics & Space Science

An observer measures the North Star (Polaris) at an altitude of 70°. The observer's latitude is

a. 25°N. b. 20°N. c. 105°N. d. 70°N. e. none of these.

Physics & Space Science