Measuring mass

In the lab we use different instruments to measure mass, today we look at the triple beam balance.

There are three (3) scales on a triple beam balance. Observe each scale in the picture shown.

The first (front) beam on the balance is the smallest scale and can measure up to 10 grams on some scales.

The second (middle) beam on the balance is the largest scale and can measure up to 500 grams on most scales.

The third (back) beam on the balance is the second largest scale and can measure up to 100 grams on some scales.

The final reading on the triple beam balance is found by add the readings on all three (3) scales.

Final reading = first scale reading + second scale reading + third scale reading

The reading of the triple beam balance in the picture is:

First scale reading: 5.4 g

Second scale reading: 200 g

Third scale reading: 20 g

Final reading = first scale + second scale + third scale

Final reading = 5.4 + 200 + 20

Final reading = 225.4 g