If the length of a rod is measured as $830600 \ mm$,then the number of significant figures in the measurement is

The radius of a thin wire is $0.16 \; mm$. The area of cross-section taking significant figures into consideration in square millimeters is?

Length,breadth,and thickness of a strip having a uniform cross-section are measured to be $10.5 \ cm$,$0.05 \ mm$,and $6.0 \ \mu m$,respectively. Which of the following option$(s)$ give$(s)$ the volume of the strip in $cm^3$ with correct significant figures?

"Changing the units of measurement does not change the number of significant figures." Explain with an example.

Which is the best method to determine significant numbers?

$A$ piece of length $3.532 \ m$ is cut from a rod of length $43.4 \ m$. The length of the remaining rod in metre is (up to correct significant figures)