How long will it take to produce 150 kW with 780 J of energy?
I got
E= P x T 780J = 150kW x T 780/150000 = T = 0.0052 seconds only a short time will be able to be used.
I didn't get that... but then again I am only a student in physics.
Here's what I got:
$\displaystyle 1\mbox{WattSecond} = 1 \mbox{Joule}$
$\displaystyle \frac{\mbox{Watts}}{\mbox{Joules}} = \mbox{time}$
$\displaystyle \frac{150000W}{780J} \approx 192.3s$
http://en.wikipedia.org/wiki/Joule was where I got the 1Ws = 1J from.