9.31*10^3=_*10^5

please if you could explain it as well, i’m so confused and struggling

0.0931
9.31 x 10^3 is 9310
So 0.0931 x 10^5 equals to 9310.
When the raised power increases shift the decimal to the left hand side. If the raised power decreases then shift it to the right hand side.
Hope this helps

They can measure  the amount of energy gained or lost