The highest frequency and highest energy band of the electromagnetic spectrum is the ___________________ band
Fill in the blank(s) with correct word
gamma ray
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Active galaxy is a galaxy:
A) whose center emits large amounts of excess energy. B) whose center does not have a black hole. C) that is in the process of merging with another galaxy. D) that manifests a blueshift instead of a redshift.
Retrograde motion is discernible by watching a planet over the course of
A. a few minutes. B. many years. C. many nights. D. many hours.
The average density of neutron stars approaches:
A) a million times that of normal matter. B) a million times that of even a white dwarf. C) about 1017 kg/m3, similar to the density of atomic nuclei. D) about 1018 times that of water. E) infinity.
A golfer hits a ball on a level fairway at an angle of 30° relative to the horizontal, and it lands on the green. Another golfer hits a ball with the same speed but at an angle of 60°, and it lands on the green by the other ball. Which statement is accurate for this situation?
a. One ball is in the air longer than the other. b. One ball experiences a greater acceleration while in free flight. c. One ball experiences a smaller acceleration while in free flight. d. Two balls hit at the same speed but different angles will always land in the same location. e. Two balls hit at the same speed but different angles can never land in the same location.