Sum of all forces acting on object is it a forces, unbalanced forces , balanced forces, net forces

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.

What material does not melt at any temperature

Joan writes four numbers on the board in standard form, and then she writes their scientific notation