Suppose there were no solar wind. How would the appearance of a comet in our inner solar system be different?
A) It would not have a nucleus. B) It would be much brighter in appearance.
C) It would not have a coma. D) It would have only one tail instead of two.
D
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Permanent deformation in BCC crystals occurs on the most closely packed planes, and it happens in the most closely packed directions that are {110} planes and <111> directions in the BCC crystal. Assume that a force is applied to a BCC crystal that permanently deforms it in the [001] direction. For permanent deformation that is on a (011) plane:
a) What is the angle between the normal to the (011) plane and the [001] direction? (b) Atomic displacements along what most closely packed directions could contribute to permanent deformation of the crystal in the [001] direction?
Suppose you are observing a light bulb. In this context, which of the following is a difference between intrinsic brightness and apparent brightness?
A) The wattage of the light bulb tells you its intrinsic brightness, whereas the apparent brightness of the light bulb depends on its distance from you. B) The size of the light bulb tells you its intrinsic brightness, whereas the apparent brightness of the light bulb depends on its wattage. C) The distance from the source of the light bulb tells you its intrinsic brightness, whereas the apparent brightness of the light bulb depends on its size. D) The visual wavelength of the light bulb tells you its intrinsic brightness, whereas the apparent brightness of the light bulb depends on its distance from a neighboring light bulb.
Neglecting friction, if a Cadillac and Volkswagen start rolling down a hill together, the heavier Cadillac will get to the bottom
A. at the same time as the Volkswagen. B. after the Volkswagen. C. before the Volkswagen.
A vertical wire carries a current straight up in a region where the magnetic field vector points due North. What is the direction of the resulting force on this current?
A) North B) downward C) East D) West E) South