A charge of 25 nC is uniformly distributed along a circular arc (radius = 2.0 m) that is subtended by a 90-degree angle. What is the magnitude of the electric field at the center of the circle along which the arc lies?
a. 81 N/C
b. 61 N/C
c. 71 N/C
d. 51 N/C
e. 25 N/C
D
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The surface of Venus can be observed with:
A) the Mt. Wilson 100" telescope. B) radar observations from Arecibo. C) most amateur telescopes. D) the Hubble Space Telescope. E) All of these have provided detailed observations about the surface of our sister planet.
A heat engine operating between a pair of hot and cold reservoirs with respective temperatures of 400 K and 200 K will have what maximum efficiency?
a. 50% b. 50% c. 40% d. 45% e. 25%
The Himalayas in Asia are examples of ______________ mountains
Fill in the blank(s) with correct word
Heat is added to a 2.0 kg piece of ice at a rate of How long will it take for the ice to melt if it was initially at 0.00°C? (The latent heat of fusion for water is 334 kJ/kg and its latent heat of vaporization is 2260 kJ/kg.)
A) 0.84 s B) 530,000 s C) 4.7 s D) 670 s