Question

Take thermocol balls or mustard seeds in a bottle and shake the bottle vigorously. The seeds try to move away from each other, but stick to the bottle. Why does this happen?​

Answer 1

Explanation:

I think so it happens because of electrostatic force

Answer 2

Explanation:

Thermocol balls and mustard seeds are kept inside the bottle. And it is shaken vigorously.

The phenomenon that happens is an electrostatic force that gets into the picture.  

The electrostatic force is the force taking place due to static charges that develop due to friction on different surfaces, and it decides the charge based on a chart of electrostatic forces.

The 'unlike charges' attract each other, so the plastic bottle attracts the mustard or the thermocol balls, but each of them repel each other.