ILL GIVE BRAINLIEST!!! PLEASE SHOW WORK You are resting on an offshore raft after a swim. Over the course of 20 seconds, you count 12 waves passing by the raft.

a) What is the frequency?
b) What is the period?

Answerthe energy required is 1.60 × 10⁻¹⁸ j, to three significant figures.explanationwe define electric potential as the ratio electric potential energy to the charge,    then the following gives us the potential difference,      the formula  may be on your formula sheet.the change in electric potential energy would be the energy that would needed to move it from point a to point b. solving for that, we get    using q = 8.00  × 10⁻¹⁹ c and  δv = 2.00 v, we get    the energy required is 1.60 × 10⁻¹⁸ j, to three significant figures.

Answerthe valence of an element or radical is equal to the number of positive or negative charges on the ion.