To reach the Cassegrain focus, a hole must be cut in the center of the primary mirror
Indicate whether the statement is true or false
TRUE
Physics & Space Science
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If the velocity of wind is doubled, then the power output will increase by
A. 10 times B. 8 times C. 2 times E. 6 times
Physics & Space Science
According to our HST deep surveys, which of the below are NOT less common now than in the early universe?
A) irregular galaxies B) spiral galaxies C) quasars D) active galaxies E) elliptical galaxies
Physics & Space Science
A large volume of the solar system's space is occupied by
a. meteors. b. micrometeoroids. c. asteroids. d. comets
Physics & Space Science
Compared to a soft sound, the speed of a loud sound is
1) less, 2) greater, 3) the same, and compared to low-frequency sound, higher-frequency sound travels 4) more slowly. 5) faster. 6) the same speed.
Physics & Space Science