Which of the following planets can be seen as a crescent phase from Earth?
a. Mercury
b. Venus
c. Mars
d. Mercury and Venus
e. All of the other choices are correct.
d
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Power: For the graph shown in the figure, what physical quantity does the slope of the graph represent for a dc circuit?
A. 1/(current) B. resistance C. 1/(resistance) D. current E. resistivity
On the celestial sphere, the Sun
A) circles once each year along the path called the ecliptic. B) stays always at the same fixed point among the stars. C) circles daily around the celestial equator. D) is the central object.
Earth's magnetic field:
A) prevents charged particles in the solar wind from reaching the surface. B) is a remnant of the solar nebula's magnetic field. C) is weakening the Van Allen radiation belts. D) is the force behind plate tectonics. E) lines intersect the atmosphere at the equator.
Wein's law relates the peak wavelength of the blackbody to its size. The larger the black body, the shorter its peak wavelength
Indicate whether the statement is true or false