Lss Group 6 - Mass

This is a beam balance. It was used in the olden days to weigh meat

or vegetables in markets. Its accuracy is: 0.1grams.

You may ask how to use it?

1. Firstly, you put an object onto the metal plate.

2.Then, you move the metal piece of the 100grams scale until the arrowon the right side is near the '0(zero)' point on the plastic support.

3.Next, you move the metal piece of the 10grams scale until it is nearer to the '0(zero)' mark or until it touches the '0(zero)' mark.*make sure that when you move the plastic piece of the scales, it must restin the dents of the metal piece*

4.Finally, after you move the 10grams scale and it does not touch the '0(zero)' line, turn the knob until it does. There, you have successfully mastered the method of using the Beam Balance.

Shortly after this series of instructions, there will be a video teaching you how to use the Beam Balance. The following pictures will tell you more about the scales :

This is the 100grams scale and the 10grams scale. As you can see, the 10grams scale is behind the 100grams scale. The 10grams scale ranges from 10grams to 100grams, and the 100grams scale ranges from 100grams to 500grams. The plastic piece at every scale is the one u use to change the weight. The plastic piece at the 100grams scale weighs a 100grams and the plastic piece at the 10grams scale weighs 10grams.

This knob, ranges from 1gram to 10 grams. If the 100grams and 10grams scale cannot make the arrow reach the '0(zero)' mark, this is the essential part where it will level the Beam Balance and you will get to know the exact weight of the object.

What is Mass?

Mass is a measure of the amount of matter in a body.

The S.I unit of mass:

-kilogram(kg)

Other commonly used units for mass:

-grams(g)

-milligrams(mg)

-tonnes(t)

-kilograms(kg)

Useful Conversions:

-1 mg = 0.001 g

-1 g = 0.001 kg

-1 kg = 1,000 g

-1 t = 1,000 kg

Measuring mass

We use balances to measure mass. A beam balance makes use of known masses to measure the mass of an unknown object.

A triple balance is an accurate and reliable method of measuring mass. Most triple beam balances can measure masses up to 0.61 kg.

While triple beam balance is accurate and easy to use , many laboratories also use electronic balances . The object whose mass is to be measured is placed on the metal pan and the reading is displayed.

One advantage of the electronic balance over the beam balance is that readings can be obtained very quickly.

Group members: Vicki, Venetia, Jia Xin