&gt;sqrt(-1)

&gt;3x10^8 

&gt;Js^-1 

&gt;1.661x10^-27 kg

&gt;did there

sqrt(-1) = **i**, imaginary 

3x10^8 m/s = **c**, speed of light

Js^-1 = **watt**, unit for power

1.661x10^-27 kg = **u**, ~~atomic unit~~ unified atomic mass unit

**did there**



For anyone who was unsure.

