1. A college student produces about 126 kcal of heat per hour on
the average. What is the rate of energy production in joules?
__________kJ/h
2. On a brisk walk, a person burns about 330 Cal/h. At this
rate, how many hours of brisk walking would it take to lose 1 lb of
body fat? (A pound of body fat stores an amount of chemical energy
equivalent to 3,500 Cal.)
__________ h
3.How much heat is necessary to change 495 g of ice at -8°C to
water at 20°C?
_____________ kcal
1. A college student produces about 126 kcal of heat per hour on the average. What...
1.A pound of body fat stores an amount of chemical energy equivalent to 3,500 Cal. When sleeping, the average adult burns or expends about 0.40 Cal/h for every pound of body weight. How long would the person have to sleep continuously to lose 1 lb of body fat? (Assume the person weighs 145 lb.) h 2.On a brisk walk, a person burns about 365 Cal/h. At this rate, how many hours of brisk walking would it take to lose 1...
How many kilocalories of heat does an expenditure of 703 kJ produce? _____ kcal A pound of body fat stores an amount of chemical energy equivalent to 3500 Cal. When sleeping, the average adult burns or expends about 0.45 Cal/h for every pound of body weight. How many Calories would a 151 lb person burn during 7 hours of sleep? (Note that 1 Cal = 1 kcal.)______Cal How much heat in kcal must be added to 0.41 kg of water...
Be sure to answer all parts. What is the change in internal energy (in J) of a system that absorbs 0.769 kJ of heat from its surroundings and has 0.694 kcal of work done on it? Give your answer in scientific notation. Enter your answer in the provided box. If an athlete expends 3174 kJ/h, how long does she have to play to work off 1.00 lb of body fat? Note that the nutritional calorie (Calorie) is equivalent to 1...