# Chemisrty

posted by .

Alexander, who weighs 159lbs , decides to climb Mt. Krumpett, which is 5460ft high. For his food supply, he decides to take nutrition bars. The label on the bars states that each 100g bar contains 10g of fat, 40g of protein, and 50g of carbohydrates.Alexander wants to know exactly how many bars to pack in his backpack for the journey. To provide a margin of safety, he assumes that he will need as much energy for the return trip as for the uphill climb. How many bars should Alexander pack?

How would I even go about solving this problem? The total calories is 450 for a total bar that I calculated, is this right?

• Chemisrty -

yes, 450 Food calories is correct.

I am reluctant to work this out, as the problem is ridiculous. It wants you to assume 100 percent efficiency in conversion of candy to gravational potential energy ...which is a most riciculous assumption...then assume there is no gain of energy (loss of PE) going back down the mountain. All this makes the problem border on science fiction. Also, I wonder if whomever created this problem is competent in science.

All that notwithstanding...

numbercandybars*450FoodCalories*2000calories/FoodCalorie*4.18joules/cal
is the energy from the candy bar.

The change in gravitaional potential energy going up the mountain is mass*g*change in height.

set those equal, and you can solve for the number of candy bars given the silly assumptions above.

• Chemisrty -

I am getting 22.6, but it says that is the wrong answer.

450*2000*4.18=3762000

159*5460*9.8=8507772

## Similar Questions

1. ### Chemisty

Alexander, who weighs 159 , decides to climb Mt. Krumpett, which is 5460 high. For his food supply, he decides to take nutrition bars. The label on the bars states that each 100- bar contains 10 of fat, 40 of protein, and 50 of carbohydrates.Alexander …
2. ### Chemistry

Alexander, who weighs 159 , decides to climb Mt. Krumpett, which is 5460 high. For his food supply, he decides to take nutrition bars. The label on the bars states that each 100- bar contains 10 of fat, 40 of protein, and 50 of carbohydrates.Alexander …
3. ### Chemistry

Alexander, who weighs 159lbs , decides to climb Mt. Krumpett, which is 5460ft high. For his food supply, he decides to take nutrition bars. The label on the bars states that each 100g bar contains 10g of fat, 40g of protein, and 50g …
4. ### chemistry

Alexander wants to know exactly how many bars to pack in his backpack for the journey. To provide a margin of safety, he assumes that he will need as much energy for the return trip as for the uphill climb. How many bars should Alexander …
5. ### Chemistry

Alexander, who weighs 180 lb, decides to climb Mt. Krumpett, which is 5570 m high. For his food supply, he decides to take nutrition bars. The label on the bars states that each 100-g bar contains 10 g of fat, 40g of protein, and 50 …
6. ### Chemistry

Alexander, who weighs 180 lb, decides to climb Mt. Krumpett, which is 5570 m high. For his food supply, he decides to take nutrition bars. The label on the bars states that each 100-g bar contains 10 g of fat, 40g of protein, and 50 …
7. ### Chemistry

Alexander, who weighs 180 lb, decides to climb Mt. Krumpett, which is 5570 m high. For his food supply, he decides to take nutrition bars. The label on the bars states that each 100-g bar contains 10 g of fat, 40g of protein, and 50 …
8. ### Math

A band decides to sell protien bars to raise money for an upcoming trip. The cost (the amount the band pays for the protien bars) and the income the band receives for the protien bars are represented on the graph below. A- how many …
9. ### chemistry

Alexandra decides to climb Mt. Krumpett, which is 5000 high. She determines that this will require a total of 3600 of energy for the trip. For her food supply, she decides to take nutrition bars. The label states that each bar contains …
10. ### Chemistry

a runner eats granola bars for energy on her 100.0 mile run. Each bar contains 250.1 calories She burns 96.15 calories per km that she runs. How many granola bars does she need to equal the number of calories that she burns?

More Similar Questions