Where would you least expect to find an ionization nebula?
A) in the galactic disk
B) near a hot, young star
C) in a spiral arm
D) in the halo of our galaxy
D) in the halo of our galaxy
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A person runs up a long flight of stairs in 10 seconds. If the person's weight is 600 N and the vertical height of the stairs is 20 meters, what is the person's power output?
What form or forms of energy does a falling elastic ball have when it is at its most-squeezed position on the floor, before it begins to rebound [see figure above]?
A) Kinetic and gravitational and elastic B) Kinetic only C) Kinetic and elastic D) Gravitational only E) Elastic only
A fluid is flowing with an average speed of 1.5 m/s through a tube that has a radius of 2.0 mm and is 18 cm long. The drop in pressure is 967 Pa. What is the viscosity of the fluid?
A) 0.028 N ? s/m2 B) 0.0056 N ? s/m2 C) 0.013 N ? s/m2 D) 0.0034 N ? s/m2 E) 0.0018 N ? s/m2
When the absolute magnitudes, or brightnesses, of stars are plotted against their surface temperatures or colors, we obtain a(n)
a. Hertzsprung-Russell (or H-R) diagram. b. straight line. c. random pattern. d. none of the above