Electric fields produced by changing magnetic fields
A) start on positive charges and end on negative charges.
B) start on negative charges and end on positive charges.
C) are conservative.
D) are nonconservative.
E) do not exist.
D
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Which gases within our atmosphere act as greenhouse gases?
a. water b. carbon dioxide c. oxygen and nitrogen d. all of the above e. a and b
An ideal polarizer is placed in a beam of unpolarized light and the intensity of the transmitted light is 1.000. A second ideal polarizer is placed in the beam with its referred direction rotated 40° to that of the first polarizer
What is the intensity of the beam after it has passed through both polarizers? A) 0.7661 B) 0.4131 C) 0.5868 D) 0.6431 E) 0.5000
A rectangular steel plate with dimensions of 40.0 cm × 30.0 cm is heated from 14.0°C to 164.0°C. What is its change in area? (Coefficient of linear expansion for steel is 11 × 10^?6/C°.)
a. 8.96 cm2 b. 29.7 cm2 c. 3.96 cm2 d. 1.32 cm2 e. 9.90 cm2
Resolution: Astronomers are proud of their telescopes and often say they can "resolve a dime at so many miles." How many miles from a 102-cm-diameter telescope mirror can you place a coin of diameter 3.0 cm and just resolve the coin using light of wavelength 389 nm? (1 mi = 1.609 km)
A. 19 mi B. 9.7 mi C. 40 mi D. 190,000,000 mi