Physics, 08.10.2019 01:00 lindsaynielsen13
The spectrum of a distant star contains sodium lines that are offset from their normal position, as shown. what is the most likely explanation?
sodium spectra
a. the star is relatively hot.
b. the star is relatively cool.
c. the star is moving rapidly toward us.
d. the star is moving rapidly away from us.
Answers: 3
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The period of a pendulum varies directly as the square root of the length of the pendulum and inversely as the square root of the acceleration due to gravity. find the period when the length is 144 cm and the acceleration due to gravity is 980 cm per second squared, if the period is 7pi seconds when the length is 289 cm and the acceleration due to gravity is 980 cm per second squared.
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You can decrease the resistance of a length of wire by
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You want to move a heavy box with mass 30.0 kg across a carpeted floor. you pull hard on one of the edges of the box at an angle 30∘ above the horizontal with a force of magnitude 240 n, causing the box to move horizontally. the force of friction between the moving box and the floor has magnitude 41.5 n . what is the box's acceleration just after it begins to move
Answers: 1
The spectrum of a distant star contains sodium lines that are offset from their normal position, as...
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