Why are the bridges declared unsafe after long use ?

Why a meter bridge is used?

Why does a spring balance show wrong measure after long use?

Why do spring balances show wrong reading after long use ?

Why does a dry cell become dead after a long time even if it has not been used?

Why satellites are used for long distance TV transmission.

Give reason why does a dry cell become dead after long time even if has not been used?

Why salt bridge is not required in a lead storage cell?

A sonometer wire is under tension of 40 N and the length between the two bridges is 60 cm.A one metre long wire of the sonometer has a mass of 1.0 g.Deduce the speed of transverse waves and the frequency of the second harmonic.

Why is a salt bridge not needed in a lead storage battery?

After removing the outershell of two eggs in dil. HCl one is plced in distilled water and the other is placed in a saturated solution of NaCl. What will you observe and why?