When playing the piano, each key has a specific number of times it vibrates. the number of string vibrations correspond to changing what quality of sound? loudness pitch amplitude range

Which of the following is not a potential result of deforestation?

When a gasoline engine burns gasoline, what type of chemical reaction is occurring?

Even though the ostrich is a flightless bird, ostriches still possess wings that stretch approximately two meters across when fully extended. scientists speculate that when dinosaurs became extinct, some of the birds that lived during that time became land dwellers since they were able to consume the food that the dinosaurs once ate. over time, these species grew larger and heavier. eventually, the ostrich species became too big to fly. the wings found on ostriches are known as a. analogous structures. b. homologous structures. c. vestigial structures. d. symmetrical structures.