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velocity
mastery UK /vəˈlɒsəti/ US /vəˈlɑsəti/noun
card 1 of 10 · fill in the blank
The velocity of light is about 186,000 miles per second, but its _____ can vary in different media.
card 1 of 10 · fill in the blank
The velocity of light is about 186,000 miles per second, but its _____ can vary in different media.