Aball is thrown against a wall and bounces back toward the thrower with the same speed as it had before hitting the wall. does the velocity of the ball change in this process? a) although the speed is the same, the direction has changed. therefore, the velocity has changed. b) the velocity is the same because the speed is the same. c) without knowing the mass of the ball, the velocity is not determined. d) the velocity is now twice as large because the ball is going into the opposite direction.
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Physics, 21.06.2019 15:30
Which describe reflection? check all that apply. light bounces off a boundary.
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Physics, 22.06.2019 02:20
22. the effect of threshold braking is to a cause skids. b. lock wheels. c. prevent locking of wheels. d. increase stopping distance.
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Physics, 22.06.2019 10:00
(a) calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) imagine adding electrons to the pin until the negative charge has the very large value 1.00 mc. how many electrons are added for every 109 electrons already present
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Physics, 22.06.2019 12:30
Hydrogen atoms are excited by a laser to the =4n=4 state and then allowed to emit. what is the maximum number of distinct emission spectral lines (lines of different wavelengths) that can be observed from this system? 8 6 2 7 4 5 1 3 calculate the wavelength of the 4⟶14⟶1 transition. =λ=
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Aball is thrown against a wall and bounces back toward the thrower with the same speed as it had bef...
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