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question 16 of 2
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question 16
a piece of pie rated at 500 calories is equivalent to ____ calories of thermal energy or ____ joules of mechanical energy.
500... 2,100
500,000... 2.1 million
50,000... 2.1
5 million... 2,100
500... 4.2

Explanation:

Step1: Recall Calorie conversions

1 Calorie (food calorie) = 1000 calories (thermal) and 1 calorie (thermal) = 4.184 Joules. So 500 Calories = 500×1000 = 500,000 calories. Then in Joules: 500,000 calories × 4.184 J/calorie ≈ 2,092,000 J ≈ 2.1 million J.

Step2: Match with options

Check each option. The second option has 500,000 calories and 2.1 million Joules, which matches the conversions.

Answer:

500,000... 2.1 million (the second option in the list)