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Number of significant figures in expression 4.327 g / 2.51 cm³

The dimensions of 1/2 ε₀E² (ε₀ is permittivity of free space, E is electric field) are

The dimensional formula of a physical quantity whose unit is pascal per second, is

The smallest division on the main scale of a Vernier calipers is 0.1 cm. Ten divisions of the Vernie

If force = , then the dimensional formulae of α and β are respectively