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Select all the correct answers. which three statements about electromagnetic radiation are true?
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Awave has a wavelength of 7 mm and a frequency of 19 hertz. what is its speed?
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Ajoint produces movement when its angle decreases. which type of movement is it?
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Atennis player used a tennis racket to hit a tennis ball with a mass of 0.25 kg with a force of 5.25 newtons. how does the force the tennis racket exerted on the tennis ball compare with the force the tennis ball exerted on the tennis racket? a. the force of the tennis racket on the tennis ball is equal in magnitude and opposite in direction to the force the tennis ball exerted on the tennis racket. b. the force of the tennis racket on the tennis ball is equal in magnitude and in the same direction as the force the tennis ball exerted on the tennis racket. c. the force of the tennis racket on the tennis ball is less in magnitude and in the same direction as the force the tennis ball exerted on the tennis racket. d. the force of the tennis racket on the tennis ball is greater in magnitude and opposite in direction as the force the tennis ball exerted on the tennis racket.
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Aball rolls around a circular track with an angular velocity of 4π rad/s. what is the period of the...
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