Why were the two Keck 400" telescopes placed together atop Mauna Kea?
What will be an ideal response?
The light of both telescopes is combined with an optical interferometer to give resolution of the pair equal to the separation of the two telescopes on the top of the mountain, much better than can be done with any single telescope on its own.
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If an object's mass decreases while a constant force acts on it, the acceleration
A) decreases. B) remains the same. C) increases. D) will be zero.
Which of the following wavelengths could NOT be present as a standing wave in a 2 m long organ pipe open at both ends?
a. 4 m b. 2 m c. 1 m d. 0.89 m e. 0.5 m
Spherical Mirrors: A stature that is 3.0 cm tall statue is 24 cm in front of a concave mirror. The magnitude of the radius of curvature of the mirror is 20 cm.(a) Is the image real or virtual?(b) How far is the image from the mirror?(c) Is the image upright or inverted?(d) How tall is the image?
What will be an ideal response?
Pluto's density is most similar to:
A) the terrestrial planets. B) the jovian planets. C) moons of the jovian planets. D) Mercury, but nor Venus, Earth, or Mars. E) Saturn, but not Jupiter, Uranus, or Neptune.