알맞은 단어로 빈칸 채우기 1)물체가 한 번의 진동을 완료하는 데 걸리는 시간을
2)소리의 크기는 진동의 에 의해 결정됩니다.
3)주파수 단위는 입니다.
4)원치 않는 소리는 라고 합니다.
5)소리의 날카로움은 진동에 의해 결정됩니다.
I know you can't understand but let me say in English

1)time taken by an object to complete one oscillation is called
2)loudness is determined by the of vibration
3)the unit of frequency is
4)unwanted sound is called
5)shrillness of a sound is determined by the vibration

In 1859, charles darwin published the first edition of on the origin of species, which explained his observations of various groups of animals that showed great similarities but minor differences. darwin concluded that if a population of one species separates into two different populations that live in separate locations, then over the course of many generations the different populations can develop into different species. this idea predicted many future biological findings and became the basis of modern biology. darwin’s explanation for why different species exist is best described as a(n) law. theory. inquiry. hypothesis.