Question

the base unit for mass is ____.
mole
kelvin
gram
seconds
meter

1. choose the correct scientific notation.

0.00059 = ?
59.0 × 10^{-4}
5.9 × 10^{-5}
5.9 × 10^{-2}
5.9 × 10^{-4}

Explanation:

Step1: Recall SI base units

The SI base unit for mass is the kilogram. But among the given options, gram is a metric unit for mass. Mole is for amount of substance, kelvin for temperature, seconds for time, meter for length.

Step2: Convert 0.00059 to scientific notation

Scientific notation is \(a\times10^{n}\), where \(1\leqslant|a|\lt10\). For \(0.00059\), move the decimal point 4 places to the right to get \(a = 5.9\), and since we moved to the right \(n=-4\). So \(0.00059 = 5.9\times10^{-4}\)

Answer:

For the first question: gram
For the second question: \(5.9\times10^{-4}\)