In food energy conversions, what is the value of 192 calories in joules (J)? (Use $1 cal=4.184 J$.)

• A. $192 J$
• B. $803.328 J$
• C. $19.2 J$
• D. $45.888 J$

Answer: (B)

Verified step by step guidance

1. Identify the given information: you have 192 calories and the conversion factor 1 calorie = 4.184 joules.
2. Write down the conversion formula to convert calories to joules: \(\text{Energy in joules} = \text{Energy in calories} \times 4.184\).
3. Substitute the given value into the formula: \(\text{Energy in joules} = 192 \times 4.184\).
4. Perform the multiplication to find the energy in joules (do not calculate the final number here, just set up the expression).
5. Interpret the result as the equivalent energy in joules for 192 calories.