A balance shows a mass of

PHYSICS · Single correct · A Level · Physics · Measurements and their errors · Measurements and their errors

Problem

0.00078945\,\text{kg}

. Write this value correct to three significant figures in scientific notation. (a)

7.90\times10^{-4}\,\text{kg}

(b)

7.89\times10^{-5}\,\text{kg}

(c)

7.89\times10^{-4}\,\text{kg}

(d)

7.894\times10^{-4}\,\text{kg}