The absence of a magnetic field on Venus probably stems from its:

A) nearness to the Sun.
B) extremely thick atmosphere.
C) slow rotation.
D) high surface temperatures.
E) lower density than Earth, suggesting an absence of an iron core.


C

Physics & Space Science

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The air in this room has

A) mass. B) weight. C) energy. D) all of the above E) none of the above

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The Huygens probe took numerous pictures as it descended to Titan's surface in 2005. What did the pictures show?

A) primitive life forms B) a densely cratered surface C) lava flows of molten basalt D) features or erosion, including what appeared to be dry river valleys and lakebeds

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Briefly describe how the greenhouse effect makes a planetary surface warmer than it would be otherwise

What will be an ideal response?

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In a certain region, the electric potential due to a charge distribution is given by the equation V(x,y) = 2xy - x2 - y, where x and y are measured in meters and V is in volts

At which point is the electric field equal to zero? A) x = 0.5 m, y = 0.5 m B) x = 0 m, y = 0 m C) x = 1 m, y = 0.5 m D) x = 1 m, y = 1 m E) x = 0.5 m, y = 1 m

Physics & Space Science