The surface of Venus is hotter than the surface of Mercury because:

a) Venus is smaller than Mercury so it does not require so much energy to heat it.
b) of the volcanic activity that occurs on Venus.
c) Mercury's atmosphere prevents radiation from penetrating through to its surface.
d) Venus is closer to the Sun than Mercury.
e) Venus is more massive and is able to retain a thick atmosphere.


Answer: e) Venus is more massive and is able to retain a thick atmosphere.

Physics & Space Science

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The fraction of incident light that a body reflects is called its ______________

Fill in the blank(s) with correct word

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Consider the motion of a 1.00-kg particle that moves with potential energy given by U(x) = (-2.00 J ? m)/x + (4.00 J ? m2)/x2. Suppose the particle is moving with a speed of 3.00 m/s when it is located at x = 1.00 m

What is the speed of the object when it is located at ? A) 2.13 m/s B) 3.00 m/s C) 4.68 m/s D) 3.67 m/s

Physics & Space Science

Beam ACB has a pin support at A and is supported at C by a steel column with a square cross section (E 5 190 GPa, b 5 42 mm) and height L 5 5.25 m. The column is pinned at C and fixed at D. The column must resist a load Q at B with a factor of safety of 2.0 with respect to the critical load. The maximum permissible value of Q is approximately:


(A) 3.0 kN
(B) 6.0 kN
(C) 9.4 kN
(D) 10.1 kN

Physics & Space Science

Evaporation is when a gas is converted into a liquid

a. True b. False Indicate whether the statement is true or false

Physics & Space Science