Activity 5.8 To make a simple centrifuge model with a cardboard disc and thick thread. Class 9

Activity 5.8 To make a simple centrifuge model with a cardboard disc and thick thread. Class 9

Activity 5.8

Aim: To make a simple centrifuge model with a cardboard disc and thick thread.

Observation:

When the cardboard disc is spun slowly, particles placed on it tend to remain near the centre.

As the speed of spinning increases, the particles are pushed outwards towards the edge of the disc, demonstrating the centrifugal force in action.

The faster the disc spins, the stronger the outward push felt on the particles.

In a real centrifuge, when a mixture (such as muddy water or blood) is spun at high speed in tubes, the heavier particles move outward and settle at the bottom of the tubes, while the lighter liquid remains at the top.

This principle is demonstrated even with the simple cardboard model.

Conclusion:

Centrifugation helps in separating fine suspended particles from liquids based on different density.