Why couldn't you stand on the Sun's surface?
A) The Sun has no surface at all...the photosphere is an illusion.
B) You could stand on the surface.
C) The Sun doesn't have a solid surface.
D) The Sun's surface is too highly magnetized for anything to survive there.
E) You could stand on it, if a sufficiently protective spacesuit could be designed.
C
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The Trojan asteroids have orbits that:
A) are, on average, closer to the Sun than we are. B) cross the orbit of Earth at perihelion. C) cross the orbit of Mars, but not Earth, at perihelion. D) stay sixty degrees ahead of or behind Jupiter. E) stay out beyond Neptune.
The focal length of a convex mirror is -20 cm. What is its radius of curvature?
A) -10 cm B) 40 cm C) -40 cm D) -20 cm E) 20 cm
What are the short- and long-term effects of the Moon's tides on our rotation?
What will be an ideal response?
Convert 14 K to °C
A) 46°C B) 287°C C) 25°C D) -225°C E) -259°C