Podcast
Questions and Answers
A car is parked on a hill. Which type of energy does it primarily possess?
A car is parked on a hill. Which type of energy does it primarily possess?
- Potential energy (correct)
- Chemical energy
- Kinetic energy
- Electrical energy
When a plant performs photosynthesis, what form of energy is being converted into chemical energy?
When a plant performs photosynthesis, what form of energy is being converted into chemical energy?
- Light energy (correct)
- Gravitational energy
- Mechanical energy
- Electrical energy
A roller coaster car is at the top of a big hill. As it goes down the hill, what energy transformation is taking place?
A roller coaster car is at the top of a big hill. As it goes down the hill, what energy transformation is taking place?
- Kinetic energy transforming into potential energy
- Potential energy transforming into kinetic energy (correct)
- Potential energy transforming into chemical energy
- Chemical energy transforming into kinetic energy
Which of the following best exemplifies gravitational energy at work?
Which of the following best exemplifies gravitational energy at work?
In the context of energy transformation, what happens to the total amount of energy in a closed system?
In the context of energy transformation, what happens to the total amount of energy in a closed system?
When you eat a meal, which type of energy is your body primarily utilizing as it breaks down the food?
When you eat a meal, which type of energy is your body primarily utilizing as it breaks down the food?
A demolition ball is hanging stationary. Describe the types of energy present.
A demolition ball is hanging stationary. Describe the types of energy present.
Why is a moving air considered to have kinetic energy?
Why is a moving air considered to have kinetic energy?
What explains the observation that a conventional light bulb primarily produces heat rather than light?
What explains the observation that a conventional light bulb primarily produces heat rather than light?
A light bulb is emitting light and heat. What is the source of energy that produces light and heat?
A light bulb is emitting light and heat. What is the source of energy that produces light and heat?
Flashcards
What is energy?
What is energy?
The ability to do work.
Kinetic energy
Kinetic energy
Energy in motion.
Potential energy
Potential energy
Energy stored inside an object.
Energy transformation
Energy transformation
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Mechanical energy
Mechanical energy
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Chemical energy
Chemical energy
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Electrical energy
Electrical energy
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Gravitational energy
Gravitational energy
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Photosynthesis
Photosynthesis
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Inefficiency of Light Bulbs
Inefficiency of Light Bulbs
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Study Notes
- Energy is the ability to do work
Forms of Energy
- Energy is obtained from food, which provides the body with the ability to work and play
- The sun provides energy in the form of heat and light
- Street lights use electrical energy to provide light
Kinetic Energy
- Kinetic energy is energy in motion
- Air moving exemplifies kinetic energy
Potential Energy
- Potential energy is energy stored inside an object
- An object at rest contains potential energy
Energy Transformation
- Energy cannot be destroyed or created
- Energy transforms from one form to another
- Potential energy transforms into kinetic energy
Mechanical Energy
- Mechanical energy exists when an object has both potential and kinetic energy simultaneously
- A demolition ball at rest has potential energy
- A demolition ball in motion has kinetic energy
- A demolition ball hitting a wall demonstrates mechanical energy
Chemical Energy
- Chemical energy is a result of chemical reactions
- Digestion releases chemical energy when food is broken down
Electrical Energy
- Electrical energy is present whenever there is electricity
- A light bulb emitting light and heat is an example of electrical energy
Gravitational Energy
- Gravitational energy is motion caused by gravity
- An object falling to the ground due to Earth's gravitational pull illustrates gravitational energy
Photosynthesis
- Plants use energy from sunlight during photosynthesis
Light Bulbs
- Only 10% of the energy in a light bulb is used to create light
- 90% of a light bulb's energy creates heat
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