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

speed = frequency x wavelength

Explanation:  The speed of a wave is given by the product of its frequency and wavelength.

Frequency can be defined as the number of oscillations in a unit time. Its unit is hertz or s⁻¹.

wavelength can be defined as the distance between two crests or two troughs. Its unit is m.

Thus, the speed of wave is given as:

speed (ms⁻¹) = frequency (s⁻¹) × wavelength (m)

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