Which relative dating principle states that in an undeformed sequence of sedimentary rocks, each layer is older than the one above and younger than the one below?
A) original horizontality
B) superposition
C) cross-cutting
D) inclusion
Answer: B
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The diagram below shows a cross section of the interior of Uranus. Which of the regions do current computer models suggest is composed primarily of liquid water? The lowest pressure regions will be gaseous
a.
region 1
b.
region 2
c.
region 3
d.
all of the regions
e.
none of the regions
A home appliance is rated at 250. watts ic connected to 120. V
(a) What current does it draw? (b) What is its resistance? (c) How many kw-h does it use in one 24-hour day?
If Planck's constant were smaller than it actually is, how would the uncertainty principle be affected?
A) Quantum uncertainties would be unaffected, but quantum jumps would occur in a shorter time. B) Quantum uncertainties would then extend to lower-mass particles, such as electrons. C) Quantum uncertainties would be smaller. D) Quantum uncertainties would be larger. E) Quantum uncertainties would be unaffected, but quantum jumps would be smaller.
Over ordinary temperature ranges, the resistance of most metals such as copper
A) increases as the metal gets hotter. B) decreases as the metal gets hotter. C) is independent of the temperature of the metal. D) is a maximum at 20°C.