I think you want 2x10^-2
It’s called Scientific Notation
Answer:
The energy of the capacitors connected in parallel is 0.27 J
Given:
C = 
C' =
Potential difference, V = 300 V
Solution:
Now, we know that the equivalent capacitance of the two parallel connected capacitors is given by:

The energy of the capacitor, E is given by;


If you did this then it could lead to cheating or someone else getting hurt.
A gas heated to millions of degrees would emit mostly x-rays.