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How many grams of carbohydrate does a person of mass 75 kg need to metabolize to climb five flights of stairs (15 m height incr...Asked by Nasir
How many grams of carbohydrate does a person of mass 75 kg need to metabolize to climb five flights of stairs (15 m height increase)? Each gram of carbohydrate provides 17.6 kJ of energy. Assume 10.0% efficiency—that is, 10.0% of the available chemical energy in the carbohydrate is converted to mechanical energy.
g
What happens to the other 90% of the energy?
Could someone show me how to do this please. Thanks. I have a hard time figuring it out.
physics - Count Iblis, Friday, June 8, 2012 at 2:07pm
The person needs to do an amount of work of W = 75 kg * 15 m * 9.81 m/s^2 against gravity.
Per gram of carbohydrates, you have available 10% of 17.6 KJ to do mechanical work, so you need to divide W by 1.76 KJ to find the amount of carbohydrates needed in grams.
The other 90% converted to heat.
part a i tried it and it gave me 11036.25 that was wrong i put 110.36 that was wrong so i don't know how to do it and the answer has to be in g???please help. Thank you
g
What happens to the other 90% of the energy?
Could someone show me how to do this please. Thanks. I have a hard time figuring it out.
physics - Count Iblis, Friday, June 8, 2012 at 2:07pm
The person needs to do an amount of work of W = 75 kg * 15 m * 9.81 m/s^2 against gravity.
Per gram of carbohydrates, you have available 10% of 17.6 KJ to do mechanical work, so you need to divide W by 1.76 KJ to find the amount of carbohydrates needed in grams.
The other 90% converted to heat.
part a i tried it and it gave me 11036.25 that was wrong i put 110.36 that was wrong so i don't know how to do it and the answer has to be in g???please help. Thank you
Answers
Answered by
Nasir
How many grams of carbohydrate does a person of mass 75 kg need to metabolize to climb five flights of stairs (15 m height increase)? Each gram of carbohydrate provides 17.6 kJ of energy. Assume 10.0% efficiency—that is, 10.0% of the available chemical energy in the carbohydrate is converted to mechanical energy.
g
What happens to the other 90% of the energy?
Could someone show me how to do this please. Thanks. I have a hard time figuring it out.
physics - Count Iblis, Friday, June 8, 2012 at 2:07pm
The person needs to do an amount of work of W = 75 kg * 15 m * 9.81 m/s^2 against gravity.
Per gram of carbohydrates, you have available 10% of 17.6 KJ to do mechanical work, so you need to divide W by 1.76 KJ to find the amount of carbohydrates needed in grams.
The other 90% converted to heat.
part a i tried it and it gave me 11036.25 that was wrong i put 110.36 that was wrong so i don't know how to do it and the answer has to be in g???please help. Thank you
No one has answered this question yet.
g
What happens to the other 90% of the energy?
Could someone show me how to do this please. Thanks. I have a hard time figuring it out.
physics - Count Iblis, Friday, June 8, 2012 at 2:07pm
The person needs to do an amount of work of W = 75 kg * 15 m * 9.81 m/s^2 against gravity.
Per gram of carbohydrates, you have available 10% of 17.6 KJ to do mechanical work, so you need to divide W by 1.76 KJ to find the amount of carbohydrates needed in grams.
The other 90% converted to heat.
part a i tried it and it gave me 11036.25 that was wrong i put 110.36 that was wrong so i don't know how to do it and the answer has to be in g???please help. Thank you
No one has answered this question yet.
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