Question

One shake is equal to:
a- ${{10}^{-8}}s$
b- ${{10}^{-9}}s$
c- ${{10}^{-10}}s$
d- ${{10}^{9}}s$

Answer 1

Hint:
We have different units of measurements based on the magnitude of the measurement. For example, for measuring the time taken by the earth to complete rotation on its own axis we use hours but for the time taken by the earth to complete one rotation around the sun we use days. Shake is a unit of measurement of time

Complete step by step answer:
A shake is equal to 10 nanoseconds. We know 1 nanosecond = ${{10}^{-9}}s$ . So, 10 nanoseconds will be equal to $10\times {{10}^{-9}}s={{10}^{-8}}s$ .

So, the correct answer is “Option A”.

Additional information:
The meter is one of the most fundamental units of measurement of length. In dimensional analysis it is amongst the seven fundamental quantities. When we say it is one of the seven fundamental units in the dimensional analysis, we mean that we cannot derive it by using any other quantity. Using metre for measurement of length first started in France early after the great French Revolution in 1700. Also, it is the SI unit of measurement of length and all international measurements which are not so big are measured in terms of metre. Contrary to this foot is an older quantity of measurement of length and was extensively used by the Greeks, Romans, Chinese & French to measure length

Note:
A shake is an informal metric unit of time, which has applications in nuclear physics like measuring the timings of various nuclear reactions. It is the approximate time of one generation of a nuclear chain reaction with fast neurons. It is also applicable in circuits. Since signal processions in integrated circuits are usually in the order of nanoseconds, the unit shake is used sometimes.