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
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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?
a. 65 years b. 275,000 years c. 4225 years d. 8.1 years e. 524 years
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.
When the reflection of an object is seen in a plane mirror, the distance from the mirror to the image depends on
a. the wavelength of light used for viewing. b. the distance from the object to the mirror. c. the distance of both the observer and the object to the mirror. d. the size of the object.
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.