<Table> <Tr> <Th_colspan="2"> Young's modulus </Th> </Tr> <Tr> <Td_colspan="2"> A given uniaxial stress, whether tensile (extension) or compressive (compression) creates more deformation in a material with low stiffness (red) than with a high stiffness (blue). Young's modulus is a measure of stiffness . </Td> </Tr> <Tr> <Th> Common symbols </Th> <Td> </Td> </Tr> <Tr> <Th> SI unit </Th> <Td> pascal </Td> </Tr> <Tr> <Th> In SI base units </Th> <Td> Pa = kg m s </Td> </Tr> <Tr> <Th> Derivations from other quantities </Th> <Td> E ≡ σ (ε) ε = F / A Δ L / L 0 = F L 0 A Δ L (\ displaystyle E \ equiv (\ frac (\ sigma (\ varepsilon)) (\ varepsilon)) = (\ frac (F / A) (\ Delta L / L_ (0))) = (\ frac (FL_ (0)) (A \ Delta L))) </Td> </Tr> <Tr> <Th> Dimension </Th> <Td> </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Young's modulus </Th> </Tr>

What is the si unit of youngs modulus