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Which quantities are scalars? choose all that apply a. distance b. speed c. acceleration d. velocity
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The difference between a red shift and a blue shift has to do with wavelength frequency. t or f
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Which of the following is part of the explanation or description of electromagnetic waves? (select all that apply) a. electrically charged molecules in a medium transfer their energy to nearby electrically charged molecules. b. a changing electric field causes a changing magnetic field. c. magnetic molecules in a medium transfer their energy to nearby magnetic molecules. d. a changing magnetic field causes a changing electric field.
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What is the velocity of the cart at 2.0 s...