| A1-6 | Pan balance. |
| Purpose: | To demonstrate the measurement of mass. |
| Description: | A pan balance which can be read to one tenth of a gram. What one does is to compare the weight of an object of unknown mass with a reference of known mass. When the scale balances, the two weights are equal, and hence the two masses are equal since both masses are in essentially the same gravitational field. |
| References: | |
| Equipment: | Pan balance and standard set of masses. |