Active galaxies emit most of their radiation as visible light
Indicate whether the statement is true or false
FALSE
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When you stand in front of a convex mirror, the image you see is
a. real and inverted. b. real and upright. c. virtual and inverted. d. virtual and upright. e. real and inverted if your distance from the mirror is greater than two focal lengths.
Temperature Scales: Platinum melts at 3215°F. What is the corresponding temperature in the Kelvin scale?
A. 2041 K B. 2135 K C. 2207 K D. 2296 K E. 3215 K
A circular space station (shaped like a big wheel) rotates to produce “artificial gravity”. The apparent weight of an astronaut standing on the inside surface of the outer wall is equal to her weight on earth. The inside surface of the outer wall of the space station is 285m from the axis of rotation. What is the period of rotation of the station?
A. 92 s B. 34 s C. 213 s D. 183 s
A 10-kg rock and a 20-kg rock are thrown upward with the same initial speed v0 and there is no air. If the 10-kg rock reaches a maximum height h, what maximum height will the 20-kg ball reach?
A) h/4 B) h/2 C) h D) 2h E) 4h