If life exists in Uranus and Neptune, it will most likely be found
A) in the oceans of liquid ices beneath the surface
B) floating on the surface of a layer of liquid metallic hydrogen
C) high in the atmosphere where it could collect solar radiation
D) at the center, close to the rocky core where a rocky surface exists
A
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Parallel Wires: An object is hung using a metal spring. If now a current is passed through the spring, what will happen to this system?
A. The spring will contract, raising the weight. B. The spring will extend, lowering the weight. C. The weight will not move. D. The spring will begin to swing like a pendulum. E. None of these are true.
Why are Cepheid variable stars important in our study of the Milky Way galaxy?
What will be an ideal response?
Why are the star clusters in tidal tails blue?
A) They are sad at being left behind. B) The individual stars were red before the interaction, and an injection of new matter onto them turned them blue. C) Blue stars are less massive and are therefore pulled away by tidal forces more easily. D) Blue stars are more massive and therefore have greater inertia, so they stay in place while the rest of the galaxy keeps moving. E) Blue stars in these newly active star-forming regions far outshine the less massive red stars.
Express (4.3 × 106)-1/2 in scientific notation
A) 2.1 × 103 B) 2.1 × 104 C) 2.1 × 10-5 D) 4.8 × 10-4