We know that, the dimension formula of given physical quantities are [Force]=[MLT−2] [Surface tension]=[ML0T2] [Frequency]=[M0L0T−1] [Velocity gradient]=[M0L0T−1] [Angular speed]=[M0L0T−1] [Solid angle ]=[M0L0T0] [Stefan's constant ]=[ML0T3K−4] and [Planck's constant ]=[ML2T−1] Hence, we found that only (frequency and velocity gradient ) pair has same dimensions.