Physics

Problem

A balance shows a mass of

0.00078945\,\text{kg}

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

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

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

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

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