1. Burning Cheeto Prelab information

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Energy
Capacity to do work or to produce heat.
The total energy content of the universe is constant.
PHET:Energy forms and changes
PHET:Energy Skate Park(adv)
Different types of energy:
Charging up vs eating up:
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3. g = gravitational constant
Potential Energy
Potential energy – energy due to position or composition:
What are the factors that would increase potential energy?
PE = mg∆h
m = mass,
g = gravitational constant
∆h = change in height

4. How do we measure Potential Energy in food? Calorimetry
Energy in food can be ignited to transfer heat to water.
Like Potential energy, we can calculate how the water temperature is raised.
As we burn food, the water above the burner contain several variables: m × s × ΔT

5. How do we measure Potential Energy in food? Calorimetry

6. If were talking about Calorimetry ….
The energy needed to raise 1 gram of water by 1 degree Celsius is J.
This is a weird number so instead we use calorie.
calorie = J
Calorie = Kilo Joules (KJ) = 4,184 Joules
Phet – Eating and exercise

7. Joule = Energy What is a Joule?
Potential Energy = mg∆h
Food energy = m × s × ΔT
Both can be measured in a unit of Energy called a Joule.
1 Joule is approximately the energy to push a one kilogram object across a frictionless floor one meter.
10 Joules is approximately the energy needed to lift a one kilogram object 1 meter.

8. Lab: Determining Calories
Goals:
Observing what is energy that is being created by our foods
Practicing the Scientific Method
Conversion of units

9. Conversions: Appenidix A: Conversions
1 gram = 1000 milligrams
1 ounce = 28 grams
1 pound = 16 ounces = 448 grams
1 kg = 2.2 pounds = 1000 grams
1 teaspoon sugar = 4 grams of sugar
1 tablespoon sugar = 12.5 grams sugar
1000 ml = 1 liter
1 teaspoon = 5 milliliters
3 teaspoons = 1 tablespoon
1 tablespoon = 15 milliliters
¼ cup = 60 milliliters
1 cup = 16 tablespoons
1 gallon = 3.9 liters
1 calorie = 4 Joules
10 Joule = lifting 1 kg up 1 meter
1 Calorie = 1 kcalories = 1000 calories
1 g carbohydrate = 4 Calories
1 g protein = 4 Calories
1 g Fat = 9 Calories