Question

The radius of a proton is about 1.2 dermis where one dermis is equal to 10^-15m.how many centimetres is the radius of the proton?

Answer 1

It is given that,

`1 " dermis " = 10^-15 m`

`=> (1.2 cancel" dermis ")/1 = (10^-15 cancel" m")/(1 cancel" dermis" ) = (100 " cm")/ (1cancel" m")`

`=> 1.2 xx10^-15xx100 = 120xx10^-15cm`