Rapid evaporation of hot water can lead to
A) superheated steam.
B) the formation of ice.
C) both of these
D) neither of these
Answer: B
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The book "De Revolutionibus Orbium Coelestium"
a. describes how Galileo's observations and Kepler's calculations proved the Copernican theory. b. describes the construction of Galileo's telescope and his observations. c. is a dialog written to convince the general public of the merits of the Copernican theory. d. first described the Copernican theory. e. describes the Tychonian theory.
According to Lenz's law the direction of an induced current in a conductor will be that which tends to produce which of the following effects?
a. enhance the effect which produces it b. produce a greater heating effect c. produce the greatest voltage d. oppose the effect which produces it
Two parallel conductors each of 0.34 m length, separated by 6.4 × 10^?3 m and carrying 4.8 A in opposite directions, will experience what type and magnitude of mutual force? (magnetic permeability in empty space µ0 = 4? × 10^?7 T?m/A)
a. attractive, 2.1E–3 N b. repulsive, 2.1E–3 N c. attractive, 2.4E–4 N d. repulsive, 2.4E–4 N e. zero
We live in the ______________ epoch
Fill in the blank(s) with correct word