Thursday
April 17, 2014

Homework Help: chemistry

Posted by Annette on Monday, April 29, 2013 at 11:06am.

49-kg woman cheats on her diet and eats a 582-Calorie (582 kcal) jelly doughnut for breakfast.
(a) How many joules of energy are the equivalent of one jelly doughnut?
J

(b) How many stairs must the woman climb to perform an amount of mechanical work 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 is only 28% efficient in converting chemical energy to mechanical energy, how many stairs must the woman climb to work off her breakfast?
stairs

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

college physics - A 55-kg woman cheats on her diet and eats a 465-Calorie (465 ...
Physics - A con of soda displaces 3.79 * 10^-4 m^3 of water when completely ...
physics - A 60 kg woman and an 85 kg man stand 9.0 m apart on frictionless ice...
physical - Two skaters, a man and a woman, are standing on ice. Neglect any ...
PHYSICS - Two skaters, a man and a woman, are standing on ice. Neglect any ...
Physics - Two skaters, a man and a woman, are standing on ice. Neglect any ...
Physics! - Two skaters, a man and a woman, are standing on ice. Neglect any ...
physics - A 50-kg woman and a 25-kg boy stand motionless facing each other on ...
grammar - ''what if a person eats a special diet for their health?''i asked....
Chemistry - A 55 yr old woman goes to lunch and has a bacon, cheese pizza and 3 ...

Search
Members