Light from an incandescent wire travels through a cool gas and is then dispersed into a(n) ______________ spectrum
Fill in the blank(s) with correct word
line absorption, or dark line
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An object drops in free fall. At one instant it is moving at a speed of 50 meters per second. Exactly one second later its speed is about
1) 10 m/s. 2) 50 m/s. 3) 60 m/s. 4) 100 m/s. This is because 5) no net force acts on the object while in its state of free fall. 6) it gains a speed of about 10 m/s for each second of fall. 7) its velocity nearly doubles each second.
Process of Science: Observations of asteroids, comets, and meteorites help refine the theory of the formation of the solar system
Indicate whether the statement is true or false
Two planets have the same surface gravity, but planet B has twice the radius of planet A. If planet A has mass m, what is the mass of planet B?
A) 4m B) m C) m/4 D) m E) m/
When a drag strip vehicle reaches a velocity of 65.0 m/s, it begins a negative acceleration by releasing a drag chute and applying its brakes. While reducing its velocity back to zero, its acceleration along a straight-line path is a constant ?7.10 m/s2 . What displacement does it undergo during this deceleration period?
a. 595 m b. 4.58 m c. 2 110 m d. 298 m e. 9.15 m