Final answer:
The statement that one food Calorie is equivalent to about 2,800 joules is false; the correct conversion is that one food Calorie is equal to 4,184 joules.
Step-by-step explanation:
The statement that one food Calorie is equivalent to about 2,800 joules is false. One food Calorie, which is often used in food and drink application or discussions about nutrition and calories, is actually equivalent to 1 kilocalorie (kcal) or 1,000 calories (cal). The correct conversion is that one food Calorie (1 Cal with a capital C, or 1 kcal) equals 4,184 joules. This is significant in terms of measuring nutritional Calories, as it represents the amount of energy typically used to quantify the energy content in foods. Therefore, the energy content in food is significant because it can help guide dietary choices and manage energy intake for health and fitness goals.