What is the frequency of a 670 nm light wave?

4.5 x 106 s-1

2.2 x 106 s-1

2.2 x 1014 s-1

4.5 x 1014 s-1

Which of the following ocean acidification? are the most likely side effects of a ph less than 7.0 in the ocean b. more metal salts altering the ocean chemistry c. dissolution of the shells of marine organisms d. both a & b e. all of the above.

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.

What method(s) do plants use to obtain nitrogen? select all that apply. absorb it from the atmosphere use bacteria to convert nitrogen to usable form obtain usable nitrogen compounds from the soil absorb nitrogen from water taken in at the roots