A plastic rod is charged up by rubbing a wool cloth, and brought to an initially neutral metallic sphere. It is allowed to touch the sphere for a few seconds, and then is separated from the sphere by a small distance
After the rod is separated, the rod A) is repelled by the sphere.
B) is attracted to the sphere.
C) feels no force due to the sphere.
A
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Phobos is so close to Mars that tides are currently making its orbit _______________
Fill in the blank(s) with correct word
The greenhouse effect occurs because carbon dioxide in the atmosphere absorbs __________ radiation
Fill in the blank(s) with correct word
Which of the following is true of Uranus?
A) It is the largest planet of the Solar System. B) It is the brightest natural object in the sky. C) It rotates backward compared with the other planets. D) It rotates on its side with its equator almost perpendicular to its orbit.
A rod of length 1.00 m has a mass per unit length given by 
, where 
is in kg/m. The rod is placed on the x axis going from x = 0.00 m to x = 1.00 m. What is the rotational inertia of the rod in kg
style="vertical-align: -2px;" width="5px" height="18px" />m2 about the y axis? What will be an ideal response?