Engineers often attempt to capture and reuse energy or to use renewable resources to minimize harm to the environment. this is referred to as

The modern periodic table has groups.

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 produces wave a)sound b) heats c)transfer of energy d)vibrations