Alexandra decides to climb mt. krumpett, which is 5000 m high. she determines that this will require a total of 2700 kcal of energy for the trip. for her food supply, she decides to take nutrition bars. the label states that each bar contains 50 g of carbohydrates, 10 g of fat, and 40 g of protein.

The amount of energy present in the food and fuel is called calorific value. The specified quantity gets combusted at a constant pressure under normal conditions.

It is measured in kilojoule per kilogram (KJ/Kg)

The total energy of the food can be calculated by adding the energies from all the contained food components.

       Then, the energy from 50 g of carbohydrate = 50 × 4 kcal/g

       = 200 kcal

      Then, the energy from 10 g of fats= 10 × 9 kcal/g

      = 90 kcal

       Then, the energy from 40 g of protein = 40 × 4 kcal/g

       = 160 kcal

      Total energy = 200 kcal + 90 kcal + 160 kcal

       = 6

Therefore, she needs 6 nutrition bars.

To learn more about calorific value refer to the link:

link

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explanation:

a plasma is a warm ionized gasoline consisting of approximately equal numbers of definitely charged ions and negatively charged electrons. the characteristics of plasmas are notably unique from the ones of ordinary neutral gases in order that plasmas are considered a awesome "fourth kingdom of remember."