# Chapter 1 - Measurement and Problem Solving - Learning Path Questions and Exercises - Conceptual Questions - Page 27: 20

No. When we do order-of-magnitude calculations, we should not be concerned about significant figures. An order-of-magnitude calculation gives only an estimate. But this estimate may be enough to provide you with a better grasp or understanding of a physical situation. Usually, the result of an order-of-magnitude calculation is precise within a power of 10, or within an order of magnitude. That is, the number (prefix) multiplied by the power of 10 is somewhere between 1 and 10. For example, if a length result of $10^{5}$ km were obtained, it would be expected that the exact answer was somewhere between $1\times10^{5}$ and $10\times10^{5}$. So, we should not be concerned about significant figures.

#### Work Step by Step

No. When we do order-of-magnitude calculations, we should not be concerned about significant figures. An order-of-magnitude calculation gives only an estimate. But this estimate may be enough to provide you with a better grasp or understanding of a physical situation. Usually, the result of an order-of-magnitude calculation is precise within a power of 10, or within an order of magnitude. That is, the number (prefix) multiplied by the power of 10 is somewhere between 1 and 10. For example, if a length result of $10^{5}$ km were obtained, it would be expected that the exact answer was somewhere between $1\times10^{5}$ and $10\times10^{5}$. So, we should not be concerned about significant figures.

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