The magnetic field of Earth is thought to be generated by motions in its
a. atmosphere.
b. liquid water oceans.
c. solid surface.
d. molten iron interior.
d
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Animations that change when the device moves are one example of UX-driven interactivity.
Answer the following statement true (T) or false (F)
14C has a half-life of 6000 years. An ancient corpse is uncovered and found to have 1/32--one thirty-second--of the normal amount of 14C found in the bodies of people now living. How long has the body been dead?
A) 24,000 years B) 6000 years C) 12,000 years D) 30,000 years E) 36,000 years
If a lamp has a resistance of 265 ? when it operates at 250 W, what current does it carry?
a. 1.0 A b. 0.94 A c. 0.97 A d. 1.1 A e. 1.9 A
Which is a statement of Bernoulli's principle?
a. The pressure in a fluid decreases as its velocity decreases. b. The pressure in a fluid decreases as its temperature decreases. c. The pressure in a fluid decreases as its velocity increases. d. The pressure in a fluid decreases as its temperature increases. e. The speed of a fluid increases as its velocity increases.