Doubling the diameter of a loop of wire produces what change of induced emf?
A. The induced emf is 4 times as much.
B. The induced emf is twice as much.
C. There is no change in the induced emf.
D. The induced emf is 6.28 times as much.
A. The induced emf is 4 times as much.
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Which of the following is not a state thermodynamic variable?
(a) The Gibbs free energy (b) Entropy (c) Heat (d) Enthalpy
What was the frost line of the solar system?
A) the distance from the Sun where temperatures were low enough for metals to condense, between the Sun and the present-day orbit of Mercury B) the distance from the Sun where temperatures were low enough for rocks to condense, between the present-day orbits of Mercury and Venus C) the distance from the Sun where temperatures were low enough for hydrogen compounds to condense into ices, between the present-day orbits of Mars and Jupiter D) the distance from the Sun where temperatures were low enough for asteroids to form, between the present-day orbits of Venus and Earth E) the distance from the Sun where temperatures were low enough for hydrogen and helium to condense, between the present-day orbits of Jupiter and Saturn
If the magnetic field in a traveling electromagnetic wave has a maximum value of 16.5 nT, what is the maximum value of the electric field associated with this wave? (c = 3.00 × 108 m/s)
A) 5.5 × 10-17 V/m B) 4.95 V/m C) 0.495 V/m D) 55.0 × 10-16 V/m E) 55.0 × 10-15 V/m
The Permian period experienced major extinctions, which may have been due to
A) global warming. B) the emergence of the reptile. C) the breakup of Pangaea. D) the formation of Pangaea.