Plsss help pls guys

Use 4 to 5 complete sentences, explain the concepts of beats and how beats are produces.

Is a volume of space that is empty of matter.

Using the black numbers on the stopwatch to answer the questions. what is the most accurate reading of seconds as indicated by the long second hand? a. 5.3 b. 5.6 c. 7.2 d. 53 secs its for edg i found out it was 5.3 and tenth of seconds freebie