Question

An object of 2 kg is sliding with a constant velocity of 4 m/s on a frictionless horizontal table kept in vacuum.

Answer 1

Answer:

njsjjjjejsThe atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of every atom of that element. The atomic number uniquely identifies a chemical element. It is identical to the charge number of the nucleus.