Which of the following statements is true of Kuiper Belt Objects?
A) They are associated with the Jovian planets.
B) Most of them are composed of liquid helium.
C) Some of them have moons of their own.
D) They are found in regions surrounding Jupiter's orbit.
C
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Which of the following would not protect low carbon steel from corrosion in contact with an electrolyte?
(a) Coat the steel completely with copper (b) Attach the steel to the positive terminal of a 12 V battery (c) Attach a piece of zinc to the steel in the area exposed to electrolyte (d) Completely paint the steel
A fringe shift occurs for every ______ wavelength movement of the adjustable mirror in a Michelson interferometer. A fringe shift occurs when the intensity goes from bright to dark or when it goes from dark to bright
a. half c. quarter b. eighth d. whole
Would you expect polypropylene to be denser or less dense than low-density polyethylene? Why?
A) Polypropylene should be more dense because because it has a greater molecular mass. B) Polyproylene should be more dense because its molecules are able to pack more closely together. C) Polyproylene should be less dense because its molecules are not able to pack together as tightly. D) Polypropylene should be more dense given that the polyethylene is already known to be of low density.
Rising air expands and cools. The rate of cooling depends on
A) the air's moisture content. B) the dry adiabatic lapse rate. C) the energy of the water-vapor molecules. D) temperature inversions.