Which of the following does not lend support to the idea that Pluto is a Kuiper-belt object?
A) Pluto has a cometlike composition and density.
B) Pluto is regarded by many to be a planet.
C) Some asteroids have their own moons.
D) Pluto has a more eccentric orbit than other planets.
E) Some known Kuiper-belt objects are hundreds of kilometers across.
B
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Which telescope will be launched into solar orbit and eventually replace observations made by the Hubble Space Telescope?
a. Hinode b. Kepler c. Chandra d. JWST e. Fermi
How can we measure the strength of magnetic fields on the Sun?
A) by looking for the splitting of spectral lines in the Sun's spectrum B) by observing the sizes of sunspots: Bigger sunspots mean a stronger field C) by observing auroras here on Earth D) only by using sophisticated computer models, because there are no observational ways of measuring magnetic field strength
What characteristic of light mostly relates to color?
A) frequency B) amplitude C) both of these
Three cars (car L, car M, and car N) are moving with the same velocity, and slam on the brakes. The most massive car is car L, and the least massive is car N
Assuming all three cars have identical tires, for which car is the amount of work done by friction in stopping it the highest? A) The amount of work done by friction is the same for all cars. B) Car L C) Car M D) Car N