Final answer:
The energy content of 100 g of apple, which is about 59Cal, can be converted to joules by using the conversion factor of 1 Cal = 4184 J. The conversion shows that 59Cal is equivalent to 246856 J, and rounded to two significant figures, this energy content is 250000 J.
Step-by-step explanation:
The energy content of 100 g of apple is about 59Cal, and this can be converted to joules using the standard conversion factor. We know that 1 Calorie (with a capital C) is equivalent to 1 kilocalorie (kcal) and that 1 kcal = 4184 joules. Therefore, to convert Calories to joules, we multiply the number of Calories by 4184 J/kcal.
So for 100 g of apple:
- 59 Cal × 4184 J/Cal = 246856 J
However, since we want to express this value to two significant figures, we would round the converted energy to 250000 J.