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Question: The earth's magnetic field strength is 5.0Ã-10âˆ'5T.

How fast would you have to drive your car to create a 4.0 V motional emf along your 0.80 m -long radio antenna? Assume that the motion of the antenna is perpendicular to Bâƒ- .

Express your answer to two significant figures and include the appropriate units.

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