Gaussian surfaces A and B enclose the same positive charge +Q. The area of Gaussian surface A is three times larger than that of Gaussian surface B. The flux of electric field through Gaussian surface A is
A) nine times larger than the flux of electric field through Gaussian surface B.
B) three times larger than the flux of electric field through Gaussian surface B.
C) equal to the flux of electric field through Gaussian surface B.
D) three times smaller than the flux of electric field through Gaussian surface B.
E) unrelated to the flux of electric field through Gaussian surface B.
C
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Three point charges, two positive and one negative, each having a magnitude of 20 ?C are placed at the vertices of an equilateral triangle (30 cm on a side). What is the magnitude of the electrostatic force on one of the positive charges?
a. 69 N b. 40 N c. 80 N d. 57 N e. 20 N
Which of the following best describes how the greenhouse effect works?
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Which of the following is formed by direct freezing of water droplets?
a. Dew b. Snow c. Sleet d. Frost
General Questions: In order to lift a bucket of concrete, you must pull up harder on the bucket than the bucket pulls down on you.
A. True B. False