According to our theory of solar system formation, why did Uranus and Neptune end up to be much less massive than Jupiter and Saturn?
A) The colder gas in the outer regions of the solar nebula had less gravity and therefore could not gather up into such large balls as it could closer in.
B) Ices were able to condense at the distance of Jupiter and Saturn, but only rock and metal could condense at the distances of Uranus and Neptune.
C) Particles in the solar nebula were more spread out at greater distances, so that accretion took longer and there was less time to pull in gas before the solar wind cleared the nebula.
D) The size differences are thought to be a random coincidence.
C
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Of all visible objects in the celestial sphere, which appears to move the least? Why?
What will be an ideal response?
A 4.00 kg ball is moving at 2.00 m/s to the WEST and a 6.00 kg ball is moving at 2.00 m/s to the NORTH. The total momentum of the system is
A. 21.6 kg m/s at an angle of 17.7 degrees NORTH of WEST. B. 14.4 kg m/s at an angle of 45.2 degrees SOUTH of WEST. C. 21.6 kg m/s at an angle of 45.2 degrees SOUTH of WEST. D. 14.4 kg m/s at an angle of 56.3 degrees NORTH of WEST. E. 21.6 kg m/s at an angle of 56.3 degrees NORTH of WEST.
A 4.00 kg mass is moving in a circular path of radius 3.20 m with a constant tangential velocity of 6.20 m/sec. The centripetal force on the mass is
A. 40.2 N. B. 48.1 N. C. 50.5 N. D. 59.0 N. E. 62.3 N.
Which detection techniques can find the planet's orbital distance (assuming we know the mass of the star)?
A) only the Doppler technique B) only the transit technique C) only the astrometric technique D) all of these techniques