JEE Main Physics question
An ice cream has a marked value of 700 kcal. How many kilowatt-hour of energy will it deliver to the body as it is digested [AMU (Med.) 2000]
Answer: (A)
Solution
1 kcal = 4200 J = 4200/(3.6×10⁶) kWh. So 700 kcal = (700 × 4200)/(3.6×10⁶) kWh = 2,940,000/3,600,000 = 0.81 kWh.