Question

Give one example of each of the following type of physical quantity:
(i) Dimensionless constant
(ii) Dimensional constant
(iii) Dimensionless variable
(iv) Dimensional variable

Answer 1

Answer to the question #57503, Physics / Atomic and Nuclear Physics

Give one example of each of the following type of physical quantity:

(i) Dimensionless constant: coupling constant for the electromagnetic interaction $\alpha \approx \frac{1}{137.036}$

(ii) Dimensional constant: speed of light $c \approx 3 \cdot 10^8 \, \text{m/s}$

(iii) Dimensionless variable: atomic weight which is the ratio of the average mass of the atom to the $\frac{1}{12}$ of the mass of an atom of $^{12}\text{C}$ in its ground state.

(iv) Dimensional variable: force is measured in the SI unit of newtons and represented by the symbol F.

https://www.AssignmentExpert.com