The Jovian planets can be eliminated as hosts for life because:

A) they do not have an atmosphere.
B) they are too hot for liquid water to survive on the surface.
C) they have water in the form of ice on the surface.
D) they do not have solid surfaces.


D

Physics & Space Science

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At peak brightness, the white dwarf supernova is approximately ________ times as luminous as the massive star supernova at peak brightness.

A) 1.5 B) 3 C) 10 D) 100

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The half-life of 3H is 12 years. About how long does it take for 127/128 of a sample of that radionuclide to decay?

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Potential of Point-Charges: Two +6.0-µC charges are placed at two of the vertices of an equilateral triangle having sides 2.0 m long. What is the electric potential at the third vertex, relative to infinity, due to these charges? (k = 1/4??0 = 9.0 × 109 N ? m2/C2)

A. 54 kV B. 108 V C. 0 V D. 90 kV E. 27 kV

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