1. What is half of 1/2 as a fraction?

Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.

Why does his teacher ask him to balance the equation by including the correct coefficient

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?