Question

Which one of the following is least multiple?

a. pico b. femto c. nano d. atto​

Answer 1

Answer:

Least multiple is nano.

Explanation:

We need to determine that which is the least multiple.

a) pico: It is a unit prefix in the metric system denoting a factor of one trillionth in the short scale and one billionth in the long scale. It is $10^{-12} m$.

b) femto: It is a unit prefix in the metric system denoting a factor of $10^{-15} m$.

c) nano: Nano is a unit prefix meaning "one billionth". It is $10^{-9} m$.

d) atto: It is a unit prefix in the metric system denoting a factor of $0.000000000000000001$. It is $10^{-18} m$.

So the least multiple is nano.

Option (c) is correct.

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Answer 2

Answer:

A correct answer is option (d). Out of the following, the least multiple is atto i.e. 10⁻¹⁸ m.

Explanation:

• Pico: A factor of one trillionth in the short scale and one-billionth in the long scale is indicated by the metric unit prefix pico. It is represented as 10⁻¹² m
• Femto: In the metric system, the prefix "femto" stands for a factor of 10⁻¹⁵m. In 1964, it was incorporated into the International System of Units. It is derived from the Danish term femten, which means "fifteen," and which is spelt somewhat similarly to fermi, the earlier established word for a femtometer.
• Nano: Nano is a unit prefix that means "one billionth" and has the symbol n. This prefix, which is mostly used with the metric system, represents a factor of 10⁻⁹ m or 0.000000001. It is widely used to prefix units of time and length in science and electronics.
• Atto: The metric system's atto (symbol a) unit prefix stands for a factor of 10⁻¹⁸m, or 0.000000000000000001. At the 12th General Conference on Weights and Measures (CGPM), Resolution 8 adopted the unit multiple. Its root is the Danish word atten, which means "eighteen."

Thus, out of the following, the least multiple is atto.

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