1. What is used as a moderator in a nuclear reactor? Ans: Graphite 2. Atoms are conpocom of which elements? Ans: Electrons and nuclei 3. What is the wavelength of visible spectrum? Ans: 3900-7600...
First law: In an inertial frame of reference, an object either remains at rest or continues to move at a constant velocity, unless acted upon by a force. Second law: In an inertial reference...