What is the speed of a wave with a frequency of 20 Hz and a wavelength lambda of 0.5 m

This is what i found on google “according to the collision theory, the following criteria must be met in order for a chemical reaction to occur: molecules must collide with sufficient energy, known as the activation energy, so that chemical bonds can break. molecules must collide with the proper orientation.” i hope this information you.

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B. products  hope it !