So, anyone like chemistry?

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Endotherm

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15. [GilChem2003 13.P.083.] To lose weight, the calories expended must exceed the calories consumed in food. The following table lists the energy expended during bicycling and running. How many "12 minute miles" would you have to run to consume 3 pounds of fat? (Remember that a food Calorie equals 1 kcal.)

Activity Calories/hour
Bicycling at 12 mph 480-600
Running at 5 mph 480-600

between __miles and _
__miles
I'm having grave difficulty with this problem. can anyone help?
 
Chemistry is the root of all evil. If we didn't have it, we wouldn't have fossil fuels and bullets and cyanide and mustard gas and anthrax.
 
Codcommando said:
fascinating........chemistry? I have a meth lab:smoking:
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I heard that there once was a TA at my university using the labs as a meth lab, and he would get chems from the stockroom and make drugs. Then one day someone walked in and saw powder and stuff everywhere... :laugh:

It would be really easy to make tear gas in undergraduate organic chemistry lab, by mixing bromine and acetone (learned that from my lab textbook). Bromine is used for addition reactions, detecting rates of reaction, pretty often used. Acetone is standard for glassware cleaning, there's big bottles of it everywhere. Everytime we use bromine, I get this strange urge to mix it with acetone and run around spraying tear gas, but I don't have a gas mask to protect myself. And I would get in trouble. And we need to be good and responsible students in chem lab :|.... :D

I don't know how to do your problem though. I don't think I even understand the question. I think it probably involves finding out the equivalent of 3 pounds of fat, in Calories, and then dividing that number by the lowest / highest calories burned per mile running to get the range of miles needed.
 
Alright, I figured it out. you take 453.8 g/lb * 9cal/g *3lb and that will give you your total calories in 3 lbs. Take that number and divide it by 480/600 cal/hr. Multiply that number by 5 mi/hr and you have your answer. i came up with 102.1-127.6 miles.
 
Unique set of first posts right there!
 
no. I hate chemistry. first off, I'm dumb, so that's no help. second, I find most of it extremely boring. and to add insult to injury, there's something in my chem class that makes me break out in a rash all over my hands and face.
 
dfc05 said:
It would be really easy to make tear gas in undergraduate organic chemistry lab, by mixing bromine and acetone (learned that from my lab textbook). Bromine is used for addition reactions, detecting rates of reaction, pretty often used. Acetone is standard for glassware cleaning, there's big bottles of it everywhere. Everytime we use bromine, I get this strange urge to mix it with acetone and run around spraying tear gas, but I don't have a gas mask to protect myself. And I would get in trouble. And we need to be good and responsible students in chem lab :|.... :D
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Haha. Will be doing a chem degree next year, hopefully I'll enjoy it.:E
 
Endotherm said:
15. [GilChem2003 13.P.083.] To lose weight, the calories expended must exceed the calories consumed in food. The following table lists the energy expended during bicycling and running. How many "12 minute miles" would you have to run to consume 3 pounds of fat? (Remember that a food Calorie equals 1 kcal.)

Activity Calories/hour
Bicycling at 12 mph 480-600
Running at 5 mph 480-600

between __miles and _
__miles
I'm having grave difficulty with this problem. can anyone help?
Click to expand...

It's really just simple math. 5mph means that it takes you 12 min to run a mile. That means that you burn about 70-100 kcals per mile. One kg of fat has 37 MJ. That's 3500 kcals per pound. I just looked that up on google. So 3 lbs is 10500 kcals. It'll take you atleast 105 12 min miles to burn 3 lbs. Sounds about right. People that talk about losing 5 lbs in a week are really just dehydrating themselves. You can't really lose fat that fast even if you don't eat anything.
 
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