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A given wave has a wavelength of 1.4 m and a frequency of 2.0 hz how fast is the wave moving

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velocity (speed) of a wave = frequency x wave length so speed = 2.0 x 1.4 the speed is 2.8 on your starr test you would choose the formula that uses all the words you are given in your problem notice they give you wave length and frequency the only thing you need to remember is that speed means the same as the word velocity and just erase the word in the formula and replace it with what that word = from your word problem example they told you wave length was 1.4 m so you erase the word wave length and replace it with the value 1.4 then plug the numbers in your calculator to get the answer.

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The wave in this case is moving at a speed of 2.8mhz. The speed is given by multiplying the frequency by the distance. The wavelength, frequency and speed are all variables that affect the speed at which a wave travels.