What does CCD stand for?
A. cosmic-ray channel detector
B. charge collecting device
C. channel-coupled detector
D. charge-coupled device
Answer: D
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Which of the following is true of chromatic aberration?
A) It mostly occurs in reflecting telescopes. B) It occurs when different colors are focused at slightly different distances. C) It is a natural phenomenon that occurs because of high turbulence in Earth's atmosphere. D) It is the main cause of seeing.
The chemical recipes of life are stored in each cell as information on _____
A) carbohydrate molecules B) deoxyribonucleic acid molecules C) lipid molecules D) amino acid molecules
A planet of mass M orbits a star in a circular orbit of radius R, in orbital period T. What would be the orbital period of another planet, orbiting at radius R, but having mass 2M?
A. 0.71T B. T C. 1.4T D. 2T E. 0.50T
A resistor is made out of a long wire having a length L. Each end of the wire is attached to a terminal of a battery providing a constant voltage V0
A current I flows through the wire. If the wire were cut in half, making two wires of length L/2, and both wires were attached to the battery (the end of both wires attached to one terminal, and the other ends attached to the other terminal), what would be the total current flowing through the two wires? A) 4I B) 2I C) I D) I/2 E) I/4