In addition to visible light, Hubble can do some work in the infrared and ultraviolet portions of the spectrum
Indicate whether the statement is true or false
TRUE
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Some young star clusters contain large numbers of protostars
a. True b. False Indicate whether the statement is true or false
A 4.50-kg wheel that is 34.5 cm in diameter rotates through an angle of 13.8 rad as it slows down uniformly from 22.0 rad/s to 13.5 rad/s. What is the magnitude of the angular acceleration of the wheel?
A) 0.616 rad/s2 B) 5.45 rad/s2 C) 111 rad/s2 D) 22.5 rad/s2 E) 10.9 rad/s2
Objects in the Kuiper belt
A) are in random orbits at all inclinations to the ecliptic. B) are the sources of long-period comets. C) lie beyond the orbit of Neptune, and close to the ecliptic. D) are dense, like the iron meteorites. E) lie beyond the orbit of Neptune and perpendicular to the ecliptic.
A car heading north suddenly collides at an intersection with a truck of the same mass heading east. If they lock together and travel at at 15° north of east just after the collision, how fast was the car initially traveling?
A) 14 m/s B) 7 m/s C) 28 m/s D) 11 m/s