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Energy
What is energy?
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What is energy?
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What is energy?Energy is the ability to do
work or cause change.
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What is energy?Energy is the ability to do
work or cause change.Work = Force * distance
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What is energy?Energy is the ability to do
work or cause change.Work = Force * distanceForce = Mass * Acceleration
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What is energy?Energy is the ability to do
work or cause change.The total amount of energy
in the universe doesn’t change and has always been here.
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What is energy?Energy is the ability to do
work or cause change.The total amount of energy
in the universe doesn’t change and has always been here.–1st Law of Thermodynamics
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What forms does energy come in?
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What forms does energy come in?
Kinetic energy:
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What forms does energy come in?
Kinetic energy: The energy an object has due to its motion.
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What forms does energy come in?
Kinetic energy: The energy an object has due to its motion.– The kinetic energy of an object is due to
both its mass and velocity.
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What forms does energy come in?
Kinetic energy: The energy an object has due to its motion.– The kinetic energy of an object is due to
both its mass and velocity.– Kinetic energy = ½ X mass X velocity
2
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What forms does energy come in?
– Potential energy:
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What forms does energy come in?
– Potential energy: Stored energy that results from the position or shape of an object.
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What forms does energy come in?
– Potential energy: Stored energy that results from the position or shape of an object.
Gravitational potential energy:
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What forms does energy come in?
– Potential energy: Stored energy that results from the position or shape of an object.
Gravitational potential energy: Potential energy related to an object’s height.
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What forms does energy come in?
– Potential energy: Stored energy that results from the position or shape of an object.
Gravitational potential energy: Potential energy related to an object’s height.
– Gravitational potential energy = weight X height
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Question? Who has more gravitational potential
energy?– Skier A has a mass of 50 kg and a height
of 5m.– Skier B has a mass of 60 kg and a height
of 4m.
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Question? Who has more gravitational potential
energy?– Skier A has a mass of 50 kg and a height
of 5m. GPE = 50X5 = 250 J– Skier B has a mass of 60 kg and a height
of 4m. GPE = 60X4 = 240 J
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What forms does energy come in?
– Potential energy: Stored energy that results from the position or shape of an object.
Gravitational potential energy: Potential energy related to an object’s height.
– Gravitational potential energy = weight X height
Elastic potential energy: The potential energy of objects that can be stretched or compressed.
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What are some types of energy?
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What are some types of energy?
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What are some types of energy?
Electromagnetic Thermal Sound Mechanical Electrical Nuclear Chemical
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What are some types of energy?
Electromagnetic: Energy that is caused by the acceleration of charged particles.
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What are some types of energy?
Electromagnetic: Energy that is caused by the acceleration of charged particles.
Thermal: The total of all potential and kinetic energy of a particle.
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What are some types of energy?
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What are some types of energy?
Electromagnetic: Energy that is caused by the acceleration of charged particles.
Thermal: The total of the potential and kinetic energy of the particles in an object.
Sound: The energy produced by an object’s vibration.
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What are some types of energy?
Mechanical: The form of energy that is associated with the position and motion of an object.
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What are some types of energy?
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What are some types of energy?
Mechanical: The form of energy that is associated with the position and motion of an object.
Electrical: The energy of electrical charges and can be potential or kinetic.
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What are some types of energy?
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What are some types of energy?
Nuclear: A type of potential energy that is stored in the nucleus of an atom.
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What are some types of energy?
Nuclear: A type of potential energy that is stored in the nucleus of an atom.– Nuclear fission: The splitting of nucleus.
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What are some types of energy?
Nuclear: A type of potential energy that is stored in the nucleus of an atom.– Nuclear fission: The splitting of nucleus.– Nuclear fusion: The fusing of two
separate nuclei into one nucleus.
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What are some types of energy?
Nuclear: A type of potential energy that is stored in the nucleus of an atom.– Nuclear fission: The splitting of nucleus.– Nuclear fusion: The fusing of two separate
nuclei into one nucleus. Chemical: Potential energy that is
stored in the chemical bonds that hold chemical compounds together.
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Can energy change from one type to another?
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Can energy change from one type to another?
ABSOLUTELY
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Nuclear
Electromagnetic
Chemical
Mechanical (movement)thermal (body temp.)Electrical (brain)