about physics and ph

electric current (the ampere), luminous intensity (the candela), and the amount of
substance (the mole). In our study of mechanics we shall be concerned only with
the units of length, mass, and time.

Bahi meray yeh kia hay ise ko zara detail sey biyaan karo yeh mareykuch paley nahi para yeh electric aur current ki bataain kar rehay ho yeh forex hay ise main currency aur commodities ki bateen karoo koi gures bataoo koi tips batoo meray paley tu kuch nahin aya.