During light activity, a 70 -kg person may generate 200 $\mathrm{kcal} / \mathrm{h}$ . Assuming that 20$\%$ of this goes into useful work and the other 80$\%$ is converted to heat, calculate the temperature rise of the body after 1.00 $\mathrm{h}$ if none of this heat were transferred to the environment. If you're a petite woman (~50 kg), the value is around 290 kcal. The number of burnt calories depends on many factors: Your weight and sex; The slope that you walked on However, we can say that for an average person, the number of calories burned in an hour of walking ranges from 200-500 kcal. Bogna Szyk, Maria Kluziak and Łucja Zaborowska METs x 3.5 x BW (kg) / 200 = Kcal/min. For example, Shane is a 40-year old male who weighs 195 pounds. You can use this formula to determine how many calories per minute he uses during some of his regular activities: 2 hours of bicycling @ 12.0 mph (METs: 8.0) 8.0 x 3.5 x 88.6 / 200 = 12.4 Kcal/min x 120 = 1488 Kcal ΔQ = 0.04kg*(0.48 kcal/(kg o C))*10 o C = 0.192 kcal. The total thermal energy required is (0.196 + 3.2 + 4 + 21.6 + 0.192)kcal = 29.188 kcal. Problem: If 90 g of molten lead at its melting point of 327.3 o C is poured into a 300 g casting form made of iron and initially at 20 o C, what is the final temperature of the system? Assume no energy In order to perform the calculation, all we have to do is to multiply the weight (kg), the metabolic equivalent of a task (MET) and the time of the activity (hr). Remember that 1 MET = 1 kcal/kg/hr. Units of time must be converted to hours. Therefore, 30 min = 0.5 hr. Calories burned = 70 kg x 3 kcal/kg/hr x 0.5 hr = 105 kcals burned BMR (kcal/day) = 10 × weight (kg) + 6.25 × height (cm) - 5 × age (y) + s (kcal/day), where s is +5 for males and -161 for females. We also have calculators that determine your basal metabolic rate based on other formulas. For a long time, the most common way to calculate your basal metabolic rate was the Harris-Benedict equation. It was 3. Calculate the number of calories yourself. It is also possible to calculate the number of calories your cat needs by using a mathematical formula: Cal= (weight kg^0.75)*70*Factor. You need to calculate your cat's weight in kilograms to the power of 0.75. Then multiply that number by 70. On a flat level surface, a 200 pound person will burn 1000 calories cycling at: 5.5mph (8.9kph) for 180 minutes, 10mph (16kph) for 93 minutes, and 15mph (24.1kph) for 63 minutes. In the same scenario, a 150 pound person will burn 1000 calories cycling at: 5.5mph for 240 minutes, 10mph for 124 minutes, and 15mph for 84 minutes. How much heat is needed to raise the temperature of 200 g of lead (c = 0.11 kcal/kg ? °C) by 10 C°? This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. How much heat is required to completely boil away 0.200 kg of water (H_v = 2.26 x 10^3 kJ/kg)? How much heat is needed to boil 1 kg of water to steam? what quantity of heat will be necessary to change 4k of ice at 0degree to water at 3 degree?(specific latent heat of fussion of ice =3.36 10^5j/kg, specific heat capacity of water=4200 j/kg.? uaezX7L.