How mary significant igures are in the messurement 20,500 liters?

How will the emission of an alpha particle affect the atomic number of an atom

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.

If a solution had a ph of 7 what is the solution