When a hand apporaches a charged weight suspended with a silk thread, the weight is attracted towards the hand. Why does this occur ?

When the hand approaches a charged weight suspended on the silk thread, the weight is attracted towards the hand. Why?

When air is blown In between two balls suspended close to each other they are attracted towards each other why?

Whan air is blown in between two balls suspended close to each other, they are attracted towards each other. Why?

Why the light particles like pith balls attract towards charged rod

When the heavy weight suspended and removed from the metal wire, it cannot get original length. Why?

A metal sphere is suspended from a nylon thread. Initially, the metal sphere is uncharged. When a positively charged glass rod is brought close to the metal sphere, the sphere is drawn towards the rod. But if the sphere touches the rod, it suddenly flies away from the rod. Explain, why the sphere is first attracted then repelled?

A metal sphere is suspended from a nylon thread. Initially, the metal sphere is uncharged. When a positively charged glass rod is brought close to the metal sphere, the sphere is drawn towards the rod. But if the sphere touches the rod, it suddenly flies away from the rod. Explain, why the sphere is first attracted then repelled?

Why does a body lose weight at the centre of the earth?