What type of igneous formation would agree with the principle of superposition?
What will be an ideal response?
Answer: Lava flows. When volcanoes or fissures erupt, lava flows outward; with each eruption new lava flows on top of older lava flows. Although magma also flows, magma can intrude between existing layers.
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Which of the following statements about X-rays and radio waves is not true?
A) X-rays have shorter wavelengths than radio waves. B) X-rays and radio waves are both forms of light, or electromagnetic radiation. C) X-rays have higher frequency than radio waves. D) X-rays have higher energy than radio waves. E) X-rays travel through space faster than radio waves.
Current: If a quantity you calculated has units of A ? s, what is that quantity?
A. potential B. resistivity C. resistance D. capacitance E. charge
Energy in Nuclear Reactions: When a neutron collides with a uranium-235 nucleus it can induce a variety of fission reactions. One such reaction is src="https://sciemce.com/media/4/ppg__cp1pbb0313192044__f440g1q12g6.jpg" style="vertical-align: -21.0px;" />Xe: 139.921620 u
U + 
n ? 
Xe + 
Sr + 2 
nThe following mass values are known:
Sr: 93.915367 u
U: 235.043924 u
n: 1.008665 uWhat mass of uranium is needed to produce a 10-kiloton yield? (1 u = 931.5 MeV/c2 = 1.66054 × 10-27 kg, 1-kiloton yield = 5.0 × 1012 J)
A. 0.57 kg
B. 0.66 kg
C. 6.58 kg
D. 3.85 kg
E. 1.10 kg
Astronomers have decided that, rather than being a planet, Pluto is really just a large member of
A) the asteroid belt. B) the Kuiper belt. C) the Oort cloud. D) the moon system around Neptune. E) an extrasolar planetary system.