What can be determined from the frequency and wavelength of a wave?

The frequency and wavelength of a wave allows you to determine the speed of a wave. Because the speed of a wave equals wavelength times frequency, you can determine speed knowing the both the frequency and wavelength.

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the major pests we deal with are insects, weeds and fungal diseases. a pesticide is a product, whether organic or chemical, used to kill the target pest. there are other techniques gardeners should use that can prevent the severe infestations that make the use of pesticides necessary