### Segments in this Video

#### Part A: Introduction(01:15)

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Energy is necessary to make things happen and can be measured in joules. See a review of energy forms and transformations.

#### Part B: Joules(04:59)

It takes 4,200 joules to heat one kilogram of water by 1 degree Celsius. Energy is often quoted in kilojoules. Learn about joules needed to heat different amounts of water and view the energy equation.

#### Part C: Energy Expenditure(03:55)

Learn about energy intake and expenditure. Sitting takes about 100 joules per second and 6 kilojoules per minute; the brain, heart, digestion and body temperature regulation use energy.

#### Part D: Energy Intake(09:47)

We need 8,000-10,000 kJ per day; fats contain 37 kJ/gram and carbohydrates contain 17 kJ/gram. Learn about metabolism in different species. View energy content for different foods in kJ/100 gram; a bomb calorimeter measures energy.

#### Part E: Energy Balance and Getting it Right(13:50)

View an example of energy expenditure in car engines and learn about cellular respiration in humans. View examples of foods producing 8,500 kJ per day; experts discuss weight. Losing weight requires expanding more energy and changing diet to maintain satiety.

#### Credits: Shedding Light on Energy: Episode 2—Measuring Energy(00:44)

Credits: Shedding Light on Energy: Episode 2—Measuring Energy

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# Shedding Light on Energy: Episode 2—Measuring Energy

Part of the Series : Shedding Light on Energy
 DVD (Chaptered) Price: \$129.95 DVD + 3-Year Streaming Price: \$194.93 3-Year Streaming Price: \$129.95

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### Description

In this program, we introduce the “joule”, the unit for energy. We then look at how much energy is stored in different foods by comparing apples and oranges (normally a no-no) and we discuss how much energy we need to do certain things including nothing much at all. We then explore the concept of energy balance and reveal the two simple rules for weight loss. That’s right, there are only two!

Length: 35 minutes

Item#: BVL147630

ISBN: 978-1-64347-243-0