State the uses of miswak

The conventional meaning of miswak is 'tooth-cleaning stick' or “stick used on teeth and gums to clean them”. 7,12,13 Sticks from these plants are usually chewed or tapered on one end until they became frayed into a brush-like form, which is then used to clean the teeth in a similar manner to a toothbrush.

c. newton's third law of motion

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.