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 is the third planet from the Sun and it is the only planet known to have life on it. The Earth formed around 4.5 billion years ago.It is one of four rocky planets on the inside of the Solar System.arth is the third planet from the Sun and it is the only planet known to have life on it. The Earth formed around 4.5 billion years ago.