Why is the discovery of ice fountains on Enceladus so important?
What will be an ideal response?
Ice fountains suggest that even medium sized moons may have habitable zones. This greatly increases number of potentially habitable other worlds.
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The bond between different inert-gas atoms in liquids and solids is the ______________electric dipole bond.
Fill in the blank(s) with the appropriate word(s).
Diffraction occurs because
1.light must slow down to turn sharp corners, causing a phase difference; because of that phase difference, interference occurs. 2.light spreads out after passing an edge, such as the edges of a slit, causing interference. 3.the light from two monochromatic sources in phase with each other interfere. 4.edges, such as those on a penny, cause the light to behave as if there were twice as many sources, and those virtual sources interfere with each other.
Notice that the parallax is greater (the apparent movement is larger) for the person than for the trees, and that the mountains do not appear to shift at all. Why?
A. The amount of parallax depends on an object's size, with greater parallax for larger objects. B. The amount of parallax depends on an object's size, with greater parallax for smaller objects. C. The amount of parallax depends on an object's distance, with greater parallax for more distant objects. D. The amount of parallax depends on an object's distance, with greater parallax for nearer objects.
The Sun is crossing your meridian right now. When will it cross the meridian next?
A) very close to 23 hours, 56 minutes from now B) very close to 24 hours from now C) one year from now D) It depends on the phase of the Moon.