First slide

Accuracy; precision of instruments and errors in measurements

Question

The mass and volume of a body are 4.237 g and 2.5 $c m^{3}$ respectively. The density of material of the body in correct significant figures is.

Moderate

A

$1.6048 g c m^{- 3}$
B

$1.69 g c m^{- 3}$
C

$1.7 g c m^{- 3}$
D

$1.695 g c m^{- 3}$

Solution

$∵$ $D e n s i t y = \frac{M a s s}{V o l u m e} = \frac{4.237}{2.5} \frac{g}{c m^{3}} = 1.694 / c m^{3}$
$\Rightarrow = 1.7 g / c m^{3}$

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