Which of the following is true of carbonaceous chondrites?
A) They contain materials left over from the formation of the Solar System.
B) They do not contain any volatile compounds.
C) They are a class of iron meteorites.
D) They are a class of stony-iron meteorites.
A
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Assume a gram of a substance marketed as "Pure Energy" is annihilated by a gram of a second substance "Anti-Pure Energy." How long would the energy released power a city which uses 109 watts of power?
a. 40 hrs b. 25 hrs c. 50 hrs d. 65 hrs e. 50000 hrs
In the double-slit experiment with light, suppose that the light source is turned on so briefly that only a single quantum of energy passes through the double slits. When it arrives at the screen, this energy is deposited
A) all over the white interference bands that normally appear in the double-slit experiment. B) at one small point, which could be anywhere on the screen. C) at one small point within the white interference bands. D) all over one of the white interference bands. E) at one small point, lying directly behind the slit through which the energy came.
Which of the following does NOT represent a property of carbon nanotubes useful in nanotechnology application?
The moons of Mars are
A. too small to pull themselves round. B. Phobos and Deimos. C. captured asteroids. D. All of these choices are correct.