Question

ਇਬਾ ਤੇ ਕਈ
2.
इमानशून्य कोटि की अभिक्रिया में veg
की इकाई है ​

Answer 1

the branch of science concerned with the nature and properties of matter and energy. The subject matter of physics includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms.