Kirchhoff's Rules: A multiloop circuit is shown in the figure, but some quantities are not labeled. Find the emf ? if the batteries are ideal. (It is not necessary to solve the entire circuit.)
A. +3 V
B. +19 V
C. -3 V
D. -10 V
E. -19 V
Answer: B
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Pluto, discovered in 1930, was "demoted" to "dwarf planet" status in 2006 simply because it is much smaller than the other planets.
a. true b. false
In what wavelength range was interferometry first routinely used?
A) X-ray B) optical C) infrared D) radio E) ultraviolet
Electrons emitted when light strikes the surface of a metal is
a. photon emission. b. photon absorption. c. the photoelectric effect. d. a laser. e. an emission spectrum.
A race car traveling at 100 m/s enters an unbanked turn of 400 m radius. The coefficient of (static) friction between the tires and the track is 1.1 . The track has both an inner and an outer wall. Which statement is correct?
a. The race car will crash into the outer wall. b. The race car will crash into the inner wall. c. The car will stay in the center of the track. d. The car will stay in the center of the track if the driver speeds up. e. The car would stay in the center of the track if the radius were reduced to 200 m.