What is the velocity of a wave traveling north with a frequency of 75 hertz and a wavelength of
6 meters?

Which of the following is an example of a parasite?

Why does earth rotate? because earth is formed from cold gases collapsing due to gravity because the matter in the nebula that formed earth was spinning because earth forms more than 99% of the mass of the solar system because the hydrogen atoms inside the nebula fused to form helium

How do you know when a chemical reaction has occurred