Your aim is to lose 1 kg of body fat. a) How many times you need...
Your aim is to lose 1 kg of body fat. a) How many times you need to run the stairs up and down to achieve your aim? b) What is average power output when running up the stairs? c) Is this a good exercise to lose weight?
1 kilocalorie [kcal] = 4186 Joules [J]. Human body metabolizes 1g of fat by releasing 9 kcal. There are 100 steps up the staircase, each step is 10 cm high. Its takes 50 seconds to run up the staircase. Ignore the energy used to run down the stairs. Assume human muscle energy efficiency of 25% (meaning that body metabolizes fat by converting 100 J of energy into 25 J of work to climb the stairs). Assume your weight is 65 kg
Homework Answers
A 52-kg woman eats a 640 Calorie (640 kcal) jelly doughnut for breakfast. (a) How many...
A 52-kg woman eats a 640 Calorie (640 kcal) jelly doughnut for breakfast. (a) How many joules of energy are the equivalent of one jelly doughnut? _________ J (b) How many steps must the woman climb on a very tall stairway to change the gravitational potential energy of the woman-Earth system by a value equivalent to the food energy in one jelly doughnut? Assume the height of a single stair is 15 cm. _________ stairs (c) If the human body...
2. Running up the stairs (5 pts). Time how long it takes for you (or a...
2. Running up the stairs (5 pts). Time how long it takes for you (or a friend) to run as fast as possible up a staircase. Measure the height of one step and count the steps to find how high you climbed. a) How much mechanical energy did you produce to climb the stairs? b) What was the average mechanical power produced during your climb? c) Estimate the muscle mass in your upper legs (quadriceps, hamstrings, and buttocks). (Recall that...
Each pound of fat contains 3500 food calories. When the body metabolizes food, 80.5% of this...
Each pound of fat contains 3500 food calories. When the body
metabolizes food, 80.5% of this energy goes to heat. Suppose you
decide to run without stopping, an activity that produces 1340 W of
metabolic power for a typical person.
Part A) For how many hours must you run to burn up 1 lb of
fat?
Part B) If you followed your planned exercise program, how much
heat would your body produce when you burn up a pound of fat?...
When you jog, most of the food energy you burn above your basal metabolic rate (BMR)...
When you jog, most of the food energy you burn above your basal metabolic rate (BMR) ends up as internal energy that would raise your body temperature if it were not eliminated. The evaporation of perspiration is the primary mechanism for eliminating this energy. Determine the amount of water you lose to evaporation when running for 46 minutes at a rate that uses 400 kcal/h above your BMR. (That amount is often considered to be the "maximum fat-burning" energy output....
Thermal question A 60-kg hiker plans to climb Mt Kosciuszko (2228 m) starting from Thredbo (1365m). Assume that she is 25% efficient at converting chemical energy from food into mechanical work,...
Thermal question
A 60-kg hiker plans to climb Mt Kosciuszko (2228 m) starting from Thredbo (1365m). Assume that she is 25% efficient at converting chemical energy from food into mechanical work, and that essentially all the work goes into the vertical climb. (a) (3 marks) With reference to the data above, how many servings of Nutrigrain should she eat to provide enough energy for the climb? (b) (6 marks) Climbing a mountain warms you up, and makes you sweat one...
(10%) Problem 1: thermal energy. Rubbing your hands together warms them by converting work into Solids...
(10%) Problem 1: thermal energy. Rubbing your hands together warms them by converting work into Solids Aluminum Concrete 900 840 387 840 0.215 Glass Human Body (37C)3500 Iron, steel 0.20 0.83 us 452 Water Mercury 4186 139 .000 0.0333 Otheexpertta.com à If a woman rubs her hands a total of 22 times (forward and backwards count separately), at a distance of 73 cm per rub, and with an average frictional force of 40.5 N, what is the temperature increase of...
Need help on part D & E Problem 2: Pedal Power Many villages in the developing...
Need help on part D & E
Problem 2: Pedal Power
Many villages in the developing world lack access to electricity.
One proposed solution is the ‘Free Electric’ bicycle, which is a
stationary bike hooked up to a generator and battery. Pedaling the
bike powers the generator, which creates electricity that is stored
in the battery. The inventor claims that 1 hour on the bike can
produce a whole day of electricity. Let’s put it to the test!
Assume the...
Problem 2: Pedal Power Many villages in the developing world lack access to electricity. One proposed...
Problem 2: Pedal Power
Many villages in the developing world lack access to electricity.
One proposed solution is the ‘Free Electric’ bicycle, which is a
stationary bike hooked up to a generator and battery. Pedaling the
bike powers the generator, which creates electricity that is stored
in the battery. The inventor claims that 1 hour on the bike can
produce a whole day of electricity. Let’s put it to the test!
Assume the following: The human body is 25%...
need help with questions 5,6, and 7 Assignment #2 WO Chapter 3, 4, 5, 6 &...
need help with questions 5,6, and 7
Assignment #2 WO Chapter 3, 4, 5, 6 & 7: Energy Balance and Weight Management Directions: Answer the following questions using the formulas found in Chapter 6 & 7. All work must be added to receive full credit (10-points). By completing this assignment you will satisfy #4 ECO objective and #11 and #12 MO/CO. 1. Calculate the EER for a 25-year-old man who weighs 198 pounds, is 5'8" tall and has a low...
Need answers. thank you VOCABULARY BUILDER Misspelled Words Find the words below that are misspelled; circle...
Need answers. thank you
VOCABULARY BUILDER Misspelled Words Find the words below that are misspelled; circle them, and then correctly spell them in the spaces provided. Then fill in the blanks below with the correct vocabulary terms from the following list. amino acids digestion clectrolytes nutrients antioxident nutrition basal metabolic rate extracellulare oxydation calories fat-soluble presearvatives catalist glycogen processed foods cellulose homeostasis saturated fats major mineral coenzyeme trace minerals diaretics metabolism water-soluable 1. Artificial flavors, colors, and commonly added to...
Each pound of fat contains 3500 food calories. When the body
metabolizes food, 80.5% of this energy goes to heat. Suppose you
decide to run without stopping, an activity that produces 1340 W of
metabolic power for a typical person.
Part A) For how many hours must you run to burn up 1 lb of
fat?
Part B) If you followed your planned exercise program, how much
heat would your body produce when you burn up a pound of fat?...
Thermal question
A 60-kg hiker plans to climb Mt Kosciuszko (2228 m) starting from Thredbo (1365m). Assume that she is 25% efficient at converting chemical energy from food into mechanical work, and that essentially all the work goes into the vertical climb. (a) (3 marks) With reference to the data above, how many servings of Nutrigrain should she eat to provide enough energy for the climb? (b) (6 marks) Climbing a mountain warms you up, and makes you sweat one...
(10%) Problem 1: thermal energy. Rubbing your hands together warms them by converting work into Solids Aluminum Concrete 900 840 387 840 0.215 Glass Human Body (37C)3500 Iron, steel 0.20 0.83 us 452 Water Mercury 4186 139 .000 0.0333 Otheexpertta.com à If a woman rubs her hands a total of 22 times (forward and backwards count separately), at a distance of 73 cm per rub, and with an average frictional force of 40.5 N, what is the temperature increase of...
Need help on part D & E
Problem 2: Pedal Power
Many villages in the developing world lack access to electricity.
One proposed solution is the ‘Free Electric’ bicycle, which is a
stationary bike hooked up to a generator and battery. Pedaling the
bike powers the generator, which creates electricity that is stored
in the battery. The inventor claims that 1 hour on the bike can
produce a whole day of electricity. Let’s put it to the test!
Assume the...
Problem 2: Pedal Power
Many villages in the developing world lack access to electricity.
One proposed solution is the ‘Free Electric’ bicycle, which is a
stationary bike hooked up to a generator and battery. Pedaling the
bike powers the generator, which creates electricity that is stored
in the battery. The inventor claims that 1 hour on the bike can
produce a whole day of electricity. Let’s put it to the test!
Assume the following: The human body is 25%...
need help with questions 5,6, and 7
Assignment #2 WO Chapter 3, 4, 5, 6 & 7: Energy Balance and Weight Management Directions: Answer the following questions using the formulas found in Chapter 6 & 7. All work must be added to receive full credit (10-points). By completing this assignment you will satisfy #4 ECO objective and #11 and #12 MO/CO. 1. Calculate the EER for a 25-year-old man who weighs 198 pounds, is 5'8" tall and has a low...
Need answers. thank you
VOCABULARY BUILDER Misspelled Words Find the words below that are misspelled; circle them, and then correctly spell them in the spaces provided. Then fill in the blanks below with the correct vocabulary terms from the following list. amino acids digestion clectrolytes nutrients antioxident nutrition basal metabolic rate extracellulare oxydation calories fat-soluble presearvatives catalist glycogen processed foods cellulose homeostasis saturated fats major mineral coenzyeme trace minerals diaretics metabolism water-soluable 1. Artificial flavors, colors, and commonly added to...
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