The law of thermodynamics that relates to the direction of heat flow is the
A. first law.
B. second law.
C. third law.
D. zeroth law.
Answer: B
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Explain how Edwin Hubble used Cepheid variables to change our view of the structure of the universe
What will be an ideal response?
The lowest HDI may be found in
A) Europe. B) Central Asia. C) Sub-Saharan Africa. D) Latin America. E) Central America.
Which of the following is true?
A) The Sun emits longwave radiation, whereas the Earth emits shortwave radiation. B) The Sun emits shortwave radiation, whereas the Earth emits longwave radiation. C) The radiation emitted by the Sun and the are roughly the same wavelength. D) Because the Sun is so far away, it is impossible to measure the wavelengths of its radiation.
The formation of freezing rain involves:
A. snow passing through a fairly thick layer of above freezing air before passing through a thin layer of subfreezing temperatures near the surface. B. snow passing through a fairly thin layer of above freezing air before passing through a thick layer of subfreezing temperatures near the surface. C. air temperatures decreasing uniformly with height, producing the cold conditions necessary for freezing rain formation. D. air temperatures increasing uniformly with height, producing the cold conditions necessary for freezing rain formation.