Abaseball is thrown a distance of 20 meters . what is its speed if it takes 0.5 seconds to cover the distance ?i will mark & show work

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.

Acontrol during an experiment. might change remains constant does not exist does change

Fossil fuels are organic compounds that are made from