The elliptical orbit of Mercury measurably precesses because
A) Mercury moves in the gravitational field of the other planets.
B) Mercury travels faster than any other planet.
C) Mercury is closest to the Sun.
D) the Sun's gravitational field varies along Mercury's orbit.
E) none of these
Answer: D
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Nellie's weight and normal force usually have the same magnitude when she stands on a
A) horizontal surface. B) inclined surface. C) either a horizontal or inclined surface.
A proton is accelerated from rest through a potential difference of 2.5 kV and then moves perpendicularly through a uniform 0.60-T magnetic field. What is the radius of the resulting path?
a. 15 mm b. 12 mm c. 18 mm d. 24 mm e. 8.5 mm
During which of the following processes is latent heat released?
What will be an ideal response?
In chemistry, oxidation occurs when a substance
A) loses electrons B) rearranges its electrons internally C) accepts electrons D) breaks into its constituent atoms