A quantum computer built from 4 qubits
A) must be in only one of its 16 possible quantum states.
B) must be in only one of its 4 possible quantum states.
C) can be in all 8 of its 8 possible quantum states, simultaneously.
D) can be in all 16 of its 16 possible quantum states, simultaneously.
E) can be in all 4 of its 4 possible quantum states, simultaneously.
D
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A spring-powered dart gun is un-stretched and has a spring constant 150 N/m. The spring is compressed by 8.00 cm and a 5.00 gram projectile is placed in the gun. The maximum height of the projectile when it is shot at an angle of 30.0 degrees above the horizontal from the gun is
A. 5.03 m. B. 4.24 m. C. 3.90 m. D. 3.20 m. E. 2.45 m.
Interstellar dust consists mostly of
A) ozone "smog." B) microscopic particles of carbon and silicon. C) hydrogen and helium atoms. D) tiny grains of water ice. E) the same tiny particles found in household dust.
In the Ptolemaic model, retrograde motion is due to
A) relative motion between the Earth and another planet in its orbit B) the Earth reversing the direction of its orbit about the Sun C) a planet moving backwards in its smaller circular circle, the center of which moves in a larger circular orbit around the Earth D) a planet reversing the direction of its orbit about the Sun
A string with a mass/length of 0.00200 kg/m is stretched between two points with a tension of 120 N. If the fundamental frequency is 660 Hz, then what is the distance between the two points?
A. 17.5 cm B. 18.6 cm C. 20.3 cm D. 26.7 cm E. 30.0 cm