Answer is:
Its atomic number remains the same but its actual mass decreases
Explanation:
When a nucleus emits a photon, then Its atomic number remains the same but its actual mass decreases
Answer is:
non-luminous heavenly bodies
Explanation:
Planets don't have their own light so they are said to be non-luminous.
Answer is:
intensity of sound
Explanation:
decible is unit of sound
Answer is:
Momentum
Explanation:
A scalar quantity is defined as the physical quantity that has only magnitude, for example, mass, energy and electric charge.
On the other hand, a vector quantity is defined as the physical quantity that has both magnitude as well as direction like force, weight, acceleration, momentum and velocity.