Question

a student wants to measure the density of a liquid. which of these tools are needed to do so? a. a ruler and a balance b. a balance and a barometer c. a balance and a graduated cylinder d. a thermometer and a graduated cylinder

Explanation:

Step1: Recall density formula

Density $
ho=\frac{m}{V}$, where $m$ is mass and $V$ is volume.

Step2: Identify mass - measuring tool

A balance is used to measure the mass $m$ of the liquid.

Step3: Identify volume - measuring tool

A graduated cylinder is used to measure the volume $V$ of the liquid.

Answer:

C. a balance and a graduated cylinder