Waves with a wavelength of 10 meters will begin to touch bottom when the depth of water is meters.

When the depth is less than 0.5 m

Explanation:

Waves will begin to touch bottom when depth of the water is less than 1/20 of the wavelength. This type of wave is known as a shallow wave.

wavelength = 10 m

It will begin to touch bottom when its depth is less than

1/20 x 10 = 0.5 m

uranium fissions/breaks up giving out energy and neutrons

the part of the wave he is travelling on is the crest