Color blindness is caused by
A) damage to the retina.
B) cataracts.
C) a missing cone-type.
D) a missing rod-type.
E) lack of melanin.
C
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If the Sun instantaneously turned into a black hole of one solar mass, what would happen to the Earth?
Semiconductors: When a voltage is applied across a p-type semiconductor, the holes
A. are destroyed. B. move toward the positive electrode. C. move toward the negative electrode. D. do not move.
The quantity of work equal to one joule is also equivalent to which of the following?
a. watt b. watt /s c. watt / s d. watt /s2
When a ball undergoes a two-dimensional elastic collision with a smooth wall, the angle that the incident path makes with the perpendicular to the wall is equal to the angle that the outgoing path makes with the perpendicular to the wall
Explain why this is so.