A conducting loop in the form of a circle is placed perpendicular to a magnetic field of 0.50 T. If the area of the loop increases at a rate of 3.0 × 10-3 m2/s, what is the induced emf in the loop?
A) 4.3 mV
B) 0 mV
C) 1.5 mV
D) 1.7 mV
E) 5.5 mV
C
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Which physical property in Laplace's nebular hypothesis could not explain the Sun's slow rotation?
a. angular momentum b. angular diameter c. gravitational pull d. radiation pressure e. electromagnetic energy
A piece of aluminum has density 2.70 g/cm3 and mass 769 g. The aluminum is submerged in a container of oil (oil's density = 0.650 g/cm3). How much oil does the metal displace?
a. 285 cm3 b. 185 cm3 c. 438 cm3 d. 2 080 cm3 e. 3 190 cm3
In order for a satellite to be geosynchronous, its orbit must:
a. go over the North and South Poles. c. be over a single longitude. b. be over the equator. d. emit television signals.
The distance from Earth to the Sun is about 93 million miles. How many times this distance is the size of the Milky Way galaxy?
a. Roughly 10 million times. b. Roughly 10 thousand times. c. Roughly 10 billion times. d. Roughly 100 billion times.