Uranus and Neptune are often called twin worlds. How do their axial tilts differ?
What will be an ideal response?
At 98 degrees, Uranus is flopped over on its side, and can have its pole pointing directly at the Sun, as it did when Voyager 2 passed it in 1986. Neptune's tilt is a more normal 29 degrees.
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It is believed that there was a heavy bombardment of planetesimals at what stage in planetary development?
a. cratering b. flooding c. slow surface evolution d. plate tectonics e. differentiation
How fast does light travel from Proxima Centuri to Earth?
a. 4.2 ly b. 4.2 years c. 3 × 10^8 m/s d. None of the other choices are correct.
A 50.0-kg box rests on a horizontal surface. The coefficient of static friction between the box and the surface is 0.300 and the coefficient of kinetic friction is 0.200
What is the friction force on the box if (a) a horizontal 140-N push is applied to it? (b) a horizontal 175-N push is applied to it?
As waves enter shallow water, wave speed
A) decreases, causing the wave to bend perpendicular to the shore. B) increases, causing the wave to bend parallel to the shore. C) decreases, causing the wave to bend parallel to the shore. D) increases, causing the wave to bend perpendicular to the shore.