How do many of the jovian-type extrasolar planets seem to defy portions of the solar nebula theory? How can this perhaps be reconciled?
What will be an ideal response?
The solar nebula theory predicts the Sun's heat would drive light gases far out, making the jovian planets form far out, and letting denser terrestrials form closer in. But most of the jovians yet discovered are quite close to their home stars, perhaps due to tidal interactions causing these planets to spiral inward after they formed farther out.
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Why can't current theories describe what happened during the Planck era?
A) We do not yet have a theory that links quantum mechanics and general relativity. B) We do not know how hot or dense the universe was during that time. C) We do not understand the properties of antimatter. D) The Planck era was the time before the Big Bang, and we cannot describe what happened before that instant.
A fan, electric heater, and lamp are connected in parallel across a 120-V line. The resistances are Rlamp = 148 ?, Rheater = 32 ?, and Rfan = 48 ?. What is the total current supplied to the circuit?
a. 17.0 A b. 7.06 A c. 0.526 A d. 1.90 A
Consider an LRC series circuit. The impedance of the circuit increases if XC increases. When is this statement true?
A) always true B) true only if XL is less than or equal to XC C) true only if XL is greater than XC D) true only if XL is equal to XC E) never true
How does the magnetic tilt of Jupiter compare with our field?
A) Both are exactly perpendicular to our equator, aligned with our rotation axis. B) Jupiter's lies perpendicular to the ecliptic, while ours is tilted 23.5 degrees. C) Both are tilted about 10 degrees, but Jupiter is opposite in polarity. D) Both are tilted about 27 degrees, much like Saturn's. E) Like Uranus, Jupiter is flopped over on its side.