Be sure to answer all parts. A woman expends 93 kJ of energy in walking a...
Be sure to answer all parts. A woman expends 93 kJ of energy in walking a kilometer. The energy is supplied by the metabolic breakdown of food intake and has a 35 percent efficiency. If the woman drives a car over the same distance, how much energy is used if the car gets 8.8 km per liter of gasoline (approximately 20 mi/gal)? The density of gasoline is 0.71 g/mL, and its enthalpy of combustion is 49 kJ/g. Enter your answer in scientific notation.
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Be sure to answer all parts. A woman expends 93 kJ of energy in
walking a...
A woman expends 94 kJ of energy in walking a kilometer. The energy is supplied by...
A woman expends 94 kJ of energy in walking a kilometer. The energy is supplied by the metabolic breakdown of food intake and has a 35 percent efficiency. If the woman drives a car over the same distance, how much energy is used if the car gets 8.9 km per liter of gasoline (approximately 20 mi/gal)? The density of gasoline is 0.71 g/mL, and its enthalpy of combustion is 49 kJ/g.
3 attempts left Check my work Be sure to answer all parts. Isooctane (CgHis; d=0.692 g/mL)...
3 attempts left Check my work Be sure to answer all parts. Isooctane (CgHis; d=0.692 g/mL) is used as the fuel during a test of a new automobile engine. How much energy (in kJ) is released by complete combustion of 29.7 gal of isooctane to gases (AH' = -5.44 x 103 kJ/mol)? Enter your answer in scientific notation. rxn * 10 kJ
Be sure to answer all parts. What is the change in internal energy (in J) of...
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...
Be sure to answer all parts. Mass and energy are alternate forms of a single entity...
Be sure to answer all parts. Mass and energy are alternate forms of a single entity called mass-energy. The relationship between these two physical quantities is described by Einstein's equation, E = mc², where Els energy, mis mass, and c is the speed of light (3.00 x 108 m/s). In a combustion experiment, it was found that 12.096 g of hydrogen molecules combined with 96.000 g of oxygen molecules to form water and released 1.715 10 kJ of heat. Calculate...
Be sure to answer all parts. A 45−kg person drinks 5.0 × 102 g of milk,...
Be sure to answer all parts. A 45−kg person drinks 5.0 × 102 g of milk, which has a caloric value of approximately 3.0 kJ/g. If only 17 percent of the energy in milk is converted to mechanical work, how high (in meters) can the person climb based on this energy intake? Enter your answer in scientific notation. Hint: The work done in ascending is given by mgh, where m is the mass (in kg), g is the gravitational acceleration...
3 attempts left Check my work Be sure to answer all parts. Isooctane (CgHis; d=0.692 g/mL) is used as the fuel during a test of a new automobile engine. How much energy (in kJ) is released by complete combustion of 29.7 gal of isooctane to gases (AH' = -5.44 x 103 kJ/mol)? Enter your answer in scientific notation. rxn * 10 kJ
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...
Be sure to answer all parts. Mass and energy are alternate forms of a single entity called mass-energy. The relationship between these two physical quantities is described by Einstein's equation, E = mc², where Els energy, mis mass, and c is the speed of light (3.00 x 108 m/s). In a combustion experiment, it was found that 12.096 g of hydrogen molecules combined with 96.000 g of oxygen molecules to form water and released 1.715 10 kJ of heat. Calculate...
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