Question

two people both have cell phones. one person thinks their cell phone is lighter than the other. what is the best tool to compare the masses of the cell phones? a beaker b thermometer c graduated cylinder d balance

Explanation:

A beaker is for holding liquids, a thermometer measures temperature, a graduated cylinder measures liquid volume. A balance is used to measure mass, which is needed to compare the masses of the cell - phones.

Answer:

d. balance