Suppose that we allowed each person 1000 m3 of living space in a large building, with ceiling height 3 m
To the nearest order of magnitude, how many 1000 m high
buildings would have to be built to house the entire population of 8.5 x 1014 people on the
energy-limited Earth if each building's base were 100 km on a side?
a. 101
b. 102
c. 105
d. 108
e. 1013
A
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Faraday's Law: A circular coil of 20 turns and radius 5.0 cm is placed with its plane oriented at 90° to a uniform magnetic field of 0.10 T. The field is now increased at a steady rate, reaching a value of 0.50 T after 4.0 seconds. What emf is induced in the coil?
A. 0.016 V B. 0.021 V C. 0.026 V D. 0.031 V E. 0.036 V
A coil of wire is connected to a galvanometer. When a bar magnet is moved in and out of the coil, the galvanometer records a current. The current results because
a. the coil acts like a transformer b. the changing magnetic field induces an electric field in the wire c. an electromagnetic wave is generated d. the wire is ferromagnetic e. none of the above
Metamorphic foliation is
A) the same as sedimentary layering. B) the prominent orientation of recrystallized minerals. C) caused by the interaction with chemical fluids. D) a layered appearance caused by mineral growth perpendicular to direction of pressure.
A(n) _____________material has the same properties in all directions.
Fill in the blank(s) with the appropriate word(s).