Water flows faster than honey-- explain the reason?

Springs are generally made of steel but not of copper and alluminium - explain the reason .

P-nitrochlorobenzene undergoes nucleophilic substitution faster than chlorobenzene. Explain giving the resonating structures as well.

Bubbles of air coming out through water in glass vessel appears silvery to an observer standing by the sides Explain the reason.

During adiabatic expansion a gas cools - explain the reason .

A ball-bearing falling in a tall jar of motor oil attains a constant velocity. Explain the reason.

A swimming pool is filled with three pipes with uniform flow.The first two pipes operating simultaneously,fill the pool at the same time,during which the pool is filled by the third pipe alone.The second pipe fills the pool five hours faster than the first pipe and four hours slower than the third pipe.Find the time required by each pipe to fill the pool individually.

A bigger rain drop falls faster than smaller one. Why ?

Acid catalysed dehydration of tert-butanol is faster than that of n-butanol. Explain.

Explain why The size of the needle of a syringe controls flow rate better than the thumb pressure exerted by a doctor while administering an injection