So the frequency is f =10 cycles / 120 s = 0.0833 cycles/s. Answer: D. Frequency refers to the number of occurrences of a periodic event per time and is measured in cycles/second. In this case, there are 10 cycles per 2 minutes (also known as 10 cycles per 120 seconds).
From the scientific viewpoint, the Earth would have had to form about 4.54 billion years since the earliest material in the solar system is dated back to about this time period.
Earth takes about 365 1/4 days (365.2425 days) to revolve around or orbit the Sun. The 1/4 of a day, is why we have a leap year (a year with an extra day [which is always F â¦ ebruary 29th]) every 4 years. More information can be found in the related links below.