1 newton is equal to________dyne.                             

1 newton $=1\text{kg}\text{m}{\text{s}}^{-2}$  

$={10}^3\text{g}\times {10}^2\text{cm}{\text{s}}^{-2}$                          $(\because 1\text{kg}={10}^3\text{g}\text{1m}={10}^2\text{cm})$

 $\Rightarrow {10}^5\text{g}{\text{cms}}^{-2}$                            $(\because \text{1gm}{\text{cms}}^{-2}\text{is}\text{refered}\text{as}\text{C}\text{.G}\text{.S}\text{unit}\text{of}\text{force}\text{that}\text{is}\text{dyne})$

$={10}^5\text{dyne}$

$\therefore 1\text{newton}={10}^5\text{dyne}$