A laboratory technician is determining the density of a newly developed liquid biofuel sample.
She uses a graduated measuring cylinder and a digital mass balance.
State the equation linking density, mass and volume.
Which of the following is the standard SI unit for density?
Complete the table to show what physical quantity is measured by a digital mass balance.
| Measuring instrument | Physical quantity measured |
|---|---|
| measuring cylinder | volume |
| digital mass balance | [Answer Here] |
Describe how the technician should use each instrument to ensure her measurements of volume and mass are as accurate as possible.
The technician wants to ensure her comparison of different biofuel densities is a fair test.
State one environmental factor that must be kept constant throughout the testing.
Explain why this environmental factor must be kept constant to ensure a fair test.
