Answer:
time for maximum energy is 1.718 sec
Explanation:
Maximum energy on the capacitor is given as 
Maximum energy 
The maximum charge is given by

Or
Or
solving for t

Putting all value to get desired value


Answer:
I'm not sure if you maybe forgot to add in some information but I can give you the equation you will need to solve this..! (just without the bit of infomration you might need)

In this case you'll be solving for t and I can help you with your first step, you'll divide 2 by 4, getting you to:

It could shock you since the battery could overheat
<span>An element with 1 valence electron has a charge of -1, because there is an extra negatively charged electron attached to the ion.</span>