A calorie and a kilocalorie are both units of energy. How many calories are equivalent to one kilocalorie?

• A. 1 calorie
• B. 1000 calories
• C. 100 calories
• D. 10,000 calories

Answer: (B)

Verified step by step guidance

1. Understand the units involved: a calorie (cal) is a unit of energy, and a kilocalorie (kcal) is also a unit of energy but represents a larger amount.
2. Recall the prefix 'kilo-' in the metric system means 1000 times the base unit.
3. Therefore, 1 kilocalorie (kcal) is equal to 1000 calories (cal).
4. Express this relationship mathematically as: \$1\ \text{kcal} = 1000\ \text{cal}$.
5. Use this conversion factor to convert between kilocalories and calories whenever needed.