3. Unit And Measurement question bank (Physics)

Number of particles is given by \( n = -D \frac{n_2 - n_1}{x_2 - x_1} \) crossing a unit area perpendicular to X-axis in unit time, where \( n_1 \) and \( n_2 \) are number of particles per unit volume for the value of \( x \) meant to \( x_2 \) and \( x_1 \). Find dimensions of \( D \) called diffusion constant.

E, m, l, and G denote energy, mass, angular momentum, and gravitational constant respectively, then the dimension of \( \frac{E l^2}{m^5 G^2} \) are