Magenta light is a mixture of

A) red and blue light.
B) red and cyan light.
C) red and yellow light.
D) yellow and green light.
E) none of the above


Answer: A

Physics & Space Science

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An object has been located orbiting the sun at a distance from the sun of 65 AU. What is the approximate orbital period of this object?

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Which of the following best explains why an interstellar ramjet could, in theory, achieve continuous acceleration?

A) It uses fuel that is more efficient than any other known fuel. B) It collects its fuel as it goes, rather than having to carry the weight of fuel along with it. C) It takes advantage of theoretically possible loopholes in Einstein's theory of relativity. D) It has such a large fuel tank that it will essentially never use up all the fuel it carries. E) Its speed always gets faster because time dilation changes the rate at which time flows.

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When the reflection of an object is seen in a plane mirror, the distance from the mirror to the image depends on

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A parallel plate capacitor is connected to a battery and charged to voltage V. Leah says that the charge on the plates will decrease if the distance between the plates is increased while they are still connected to the battery. Gertie says that the charge will remain the same. Which one, if either, is correct, and why?

a. Gertie, because the maximum voltage is determined by the battery. b. Gertie, because the capacitance of the capacitor does not change. c. Leah, because the capacitance decreases when the plate separation is increased. d. Leah, because the capacitance increases when the plate separation is increased. e. Neither, because the charge increases when the plate separation is increased.

Physics & Space Science