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Which equation should be used to calculate the speed of a wave?
speed = frequency x wavelength
speed = frequency x hertz
speed = period x wavelength
speed = period x hertz
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GPT-5 mini
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speed = frequency × wavelength
In symbols: v = fλ. (Since f = 1/T you can also write v = λ/T.) The other options are incorrect: "frequency × hertz" multiplies a quantity by its unit, and "period × wavelength" has the wrong algebraic form.
In symbols: v = fλ. (Since f = 1/T you can also write v = λ/T.) The other options are incorrect: "frequency × hertz" multiplies a quantity by its unit, and "period × wavelength" has the wrong algebraic form.
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