650.j is the same amount of energy as? 2720cal1550cal650.cal2.72cal

650 J are 155 calories

Explanation:

In the world, there are many differents ways to express energy. For example, for SI base units, Joule (J) is the correct way to express energy. But it is common the use of other units in differents fields. In this case, we need to convert Joules to calories. The conversion is:

4,1845 J = 1 cal

Thus:

650 J × (1 cal / 4,1845 J) = 155 cal

I hope it helps!