Escape speed from the Moon is
A) about the same as from Earth.
B) much greater than from Earth.
C) much less than from Earth.
Answer: C
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Suppose there is a cloud containing interstellar dust between a star and us. How will the dust affect the light we see from the star?
A) It makes the star appear dimmer and redder in color. B) It makes the star appear dimmer and bluer in color. C) It does not affect the star's brightness but makes it appear redder in color. D) It makes the star appear dimmer but does not affect the star's color.
We can describe a location on Earth's surface by stating its
A) altitude and direction (or azimuth). B) meridian and longitude. C) latitude and direction. D) latitude and longitude.
Air is flowing straight toward a building. What expression would provide ?p/?x if x is measured perpendicular to the building? Neglect viscous and gravity effects and assume steady flow.
(A) ?p/?x = ?? (u?u/?x ? v?v/?y) (B) ?p/?x = ?? u?u/?x (C) ?p/?x = ?? v?u/?x (D) ?p/?x = ?? (u?u/?x ? v?u/?y)
The warmth you feel from the Sun at the beach is an example of
a. heat conduction. b. heat convection. c. heat radiation. d. thermal expansion. e. none of the above.