Which terrestrial world has the highest average surface temperature?
A) Mercury
B) Venus
C) the Moon
D) Mars
E) Earth
B) Venus
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The source of energy that powers the Sun is
A) chemical potential energy of hydrogen. B) mass energy released by nuclear fusion. C) gravitational potential energy of the contraction of the gas cloud that formed the Sun. D) kinetic energy of the orbital motion of the Sun. E) thermal energy of the hydrogen atoms in the Sun.
Light strikes a diamond (n = 2.42) immersed in glycerin (n = 1.473) at an angle of 60° relative to the normal to the surface. What is the angle of refraction?
A. 20° B. 60° C. 32° D. 64° E. 15°
Which one of the following could be a correct value for a right ascension measurement?
a) 80°E b) 10°N c) +30° d) 16 hours, 20 minutes
What is your approximate latitude if you observe Polaris to be 35° above the horizon?
A) 35° N B) 35° S C) 55° N D) 55° S E) Polaris cannot be used to find your latitude.