Final answer:
The power needed to do 648 joules of work in 100 seconds is 6.48 watts.
Step-by-step explanation:
To calculate the power needed to do 648 joules of work in 100 seconds, we can use the formula:
Power = Work / Time.
Plugging in the values, we get: Power = 648 J / 100 s = 6.48 W.
So, the power needed to do 648 joules of work in 100 seconds is 6.48 watts.