An excited gas in a gas-discharge tube emits light that disperses into a(n) ______________ spectrum
Fill in the blank(s) with correct word
line emission, or bright line
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A 2.00-kg mass object traveling east at 20.0 m/s collides with a 3.00-kg mass object traveling west at 10.0 m/s
After the collision, the 2.00-kg mass has a velocity 5.00 m/s to the west. How much kinetic energy was lost during the collision? A) 0.00 J B) 458 J C) 516 J D) 91.7 J E) 175 J
The Babcock model of the solar magnetic cycle explains the sunspot cycle as primarily a consequence of the Sun's ____
a. differential rotation b. helioseimologic activity c. coronal mass ejections d. convection currents e. meridional flow
The electric company charges a home on the basis of consumption of
a. resistance. b. energy. c. current. d. voltage. e. power.
Why did Tycho conclude that the Sun revolves around the Earth?
A) He did not conclude that the Sun revolves around the Earth. B) He could not detect the parallax of stars expected if the Earth revolves around the Sun. C) He incorrectly measured the distance to the Sun and concluded it was in a low orbit around the Earth. D) Long-held tradition prevented him from even considering the idea.