George holds a 1-m metal bar in his hand and hits its end with a hammer; first, in a direction parallel to its length; second, in a direction at right angles to its length. Describe the waves George produced in the two cases.

Why can blue light and yellow light combine to produce white light? question 17 options: they are both primary colors of light. they absorb each other's wavelengths. because blue, yellow, and white are primary colors. they are complementary colors of light.

What happens when the number of protons in an atom changes

When a metal and an bond they do not share electrons