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Energy
Forms of
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Different Forms of Energy
• Energy cannot be created or destroyed, it can only be
changed from one form to another.
• Energy comes in six forms: chemical energy,
electromagnetic energy, radiant energy, mechanical
energy, nuclear energy and thermal energy.
• These six forms of energy are all related. Each form can be
converted or changed into the other forms. For example,
when wood burns, its chemical energy changes into thermal
(heat) energy and radiant (light) energy.
© iTutor. 2000-2013. All Rights Reserved
© iTutor. 2000-2013. All Rights Reserved
mechanical energy
• Mechanical Energy is the energy a substance or system has
because of its motion(K.E.) and position(P.E).
• The Mechanical energy stays alive along with both the
kinetic energy and the potential energy which is available
in the system.
• Every moving object has mechanical energy, whether it is a
hammer driving a nail, a leaf falling from a tree, or a rocket
flying in space. Mechanical energy pulls, pushes, twists,
turns and throws.
• Our bodies also use mechanical energy to perform motions
such as throwing a ball or moving a pencil to write on
paper.
© iTutor. 2000-2013. All Rights Reserved
convert other forms of energy into
mechanical energy
© iTutor. 2000-2013. All Rights Reserved
Chemical Energy
• The motive force that powers the
human body, is provided by the
chemical energy derived through
the process of respiration.
• Chemical energy is derived from
the making and breaking of inter-
atomic bonds in molecules.
• Through molecular
rearrangements, the biological
world derives energy. The energy
derived from gasoline is an
example of chemical energy
utilization.
© iTutor. 2000-2013. All Rights Reserved
electromagnetic energy
 Energy from a magnetic field that is produced by the motion
of electric charges such as electric current.
 Electromagnetic radiation exists in the form of particles
called photons. Each particle or photon is an extremely small
grain of energy - an energy packet.
 Electromagnetic energy is said to be the type of energy which
comes from electromagnetic waves. These radiation travels
with the speed of light and can be composed of radio
waves, TV waves, radar waves, heat, light, X-rays, visible
waves, etc.
 The Sun, the earth and the ionosphere are main sources of
electromagnetic energy in nature.
© iTutor. 2000-2013. All Rights Reserved
© iTutor. 2000-2013. All Rights Reserved
nuclear energy
• Nuclear energy originates from the splitting of uranium
atoms in a process called fission..
• When the nucleus splits (fission), nuclear energy is released
in the form of heat energy and light energy.
• Nuclear energy is also released when nuclei collide at high
speeds and join (fuse).
• The sun’s energy is produced from a nuclear fusion reaction
in which hydrogen nuclei fuse to form helium nuclei.
• Nuclear energy starts with Albert Einstein—his classic
formula, E = mc2 actually describes how much energy is
released when an atom splits.
© iTutor. 2000-2013. All Rights Reserved
© iTutor. 2000-2013. All Rights Reserved
Thermal Energy
 Thermal Energy is a form of internal energy possessed by
all material matter due to random motion of atoms and
minute particles(kinetic molecular model of matter), and
the amount depends on the temperature of the material
region.
 Thermal Energy is transferred only when there is a
difference in temperature.
 Thermal Energy always flows from a region of higher
temperature to a region of lower temperature.
© iTutor. 2000-2013. All Rights Reserved
© iTutor. 2000-2013. All Rights Reserved
Energy Transfer
Chemical
Electrical
Sound
(mechanical)
Light
(Electromagnetic)
Thermal
Mechanical
© iTutor. 2000-2013. All Rights Reserved
energy conversions in motors
 Electric motors, which convert
electrical energy to mechanical
energy.
 Magnetism is the basis for all electric
motor operation. It produces the force
required to run the motor.
 When current passes through a coil of
wire, magnetic field is produced.
 Electric motors operate through the
interaction f magnetic field and current
- carrying conductors to generate force.
© iTutor. 2000-2013. All Rights Reserved
energy conversions in generators
 Electric generator is a device that converts mechanical
energy to electrical energy.
 A generator forces electric charge (usually carried by electrons)
to flow through an external electrical circuit.
© iTutor. 2000-2013. All Rights Reserved
 The generator is based on the
principle of "electromagnetic
induction”.
 An electric conductor is moved
through a magnetic field, electric
current will flow in the conductor.
 So the mechanical energy of the
moving wire is converted into the
electric energy of the current that
flows in the wire.
 In a generator The energy conversion
occurs when a coil of conducting wire
is rotated between two different poles
of two permanent magnets.
energy conversions in generators
© iTutor. 2000-2013. All Rights Reserved
energy conversions in photocells
 Photocells convert light energy into
electrical energy.
 Most photocells contain silicon atoms.
As long as a light shines on the
photocell, electrons gain enough
energy to move between atoms.
 The electrons are then able to move
though a wire to provide electrical
energy to a device, such as a
calculator.
© iTutor. 2000-2013. All Rights Reserved
Call us for more
information:
www.iTutor.com
1-855-694-8886
Visit

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Forms of Energy

  • 1. Energy Forms of T- 1-855-694-8886 Email- info@iTutor.com By iTutor.com
  • 2. Different Forms of Energy • Energy cannot be created or destroyed, it can only be changed from one form to another. • Energy comes in six forms: chemical energy, electromagnetic energy, radiant energy, mechanical energy, nuclear energy and thermal energy. • These six forms of energy are all related. Each form can be converted or changed into the other forms. For example, when wood burns, its chemical energy changes into thermal (heat) energy and radiant (light) energy. © iTutor. 2000-2013. All Rights Reserved
  • 3. © iTutor. 2000-2013. All Rights Reserved
  • 4. mechanical energy • Mechanical Energy is the energy a substance or system has because of its motion(K.E.) and position(P.E). • The Mechanical energy stays alive along with both the kinetic energy and the potential energy which is available in the system. • Every moving object has mechanical energy, whether it is a hammer driving a nail, a leaf falling from a tree, or a rocket flying in space. Mechanical energy pulls, pushes, twists, turns and throws. • Our bodies also use mechanical energy to perform motions such as throwing a ball or moving a pencil to write on paper. © iTutor. 2000-2013. All Rights Reserved
  • 5. convert other forms of energy into mechanical energy © iTutor. 2000-2013. All Rights Reserved
  • 6. Chemical Energy • The motive force that powers the human body, is provided by the chemical energy derived through the process of respiration. • Chemical energy is derived from the making and breaking of inter- atomic bonds in molecules. • Through molecular rearrangements, the biological world derives energy. The energy derived from gasoline is an example of chemical energy utilization. © iTutor. 2000-2013. All Rights Reserved
  • 7. electromagnetic energy  Energy from a magnetic field that is produced by the motion of electric charges such as electric current.  Electromagnetic radiation exists in the form of particles called photons. Each particle or photon is an extremely small grain of energy - an energy packet.  Electromagnetic energy is said to be the type of energy which comes from electromagnetic waves. These radiation travels with the speed of light and can be composed of radio waves, TV waves, radar waves, heat, light, X-rays, visible waves, etc.  The Sun, the earth and the ionosphere are main sources of electromagnetic energy in nature. © iTutor. 2000-2013. All Rights Reserved
  • 8. © iTutor. 2000-2013. All Rights Reserved
  • 9. nuclear energy • Nuclear energy originates from the splitting of uranium atoms in a process called fission.. • When the nucleus splits (fission), nuclear energy is released in the form of heat energy and light energy. • Nuclear energy is also released when nuclei collide at high speeds and join (fuse). • The sun’s energy is produced from a nuclear fusion reaction in which hydrogen nuclei fuse to form helium nuclei. • Nuclear energy starts with Albert Einstein—his classic formula, E = mc2 actually describes how much energy is released when an atom splits. © iTutor. 2000-2013. All Rights Reserved
  • 10. © iTutor. 2000-2013. All Rights Reserved
  • 11. Thermal Energy  Thermal Energy is a form of internal energy possessed by all material matter due to random motion of atoms and minute particles(kinetic molecular model of matter), and the amount depends on the temperature of the material region.  Thermal Energy is transferred only when there is a difference in temperature.  Thermal Energy always flows from a region of higher temperature to a region of lower temperature. © iTutor. 2000-2013. All Rights Reserved
  • 12. © iTutor. 2000-2013. All Rights Reserved
  • 14. energy conversions in motors  Electric motors, which convert electrical energy to mechanical energy.  Magnetism is the basis for all electric motor operation. It produces the force required to run the motor.  When current passes through a coil of wire, magnetic field is produced.  Electric motors operate through the interaction f magnetic field and current - carrying conductors to generate force. © iTutor. 2000-2013. All Rights Reserved
  • 15. energy conversions in generators  Electric generator is a device that converts mechanical energy to electrical energy.  A generator forces electric charge (usually carried by electrons) to flow through an external electrical circuit. © iTutor. 2000-2013. All Rights Reserved
  • 16.  The generator is based on the principle of "electromagnetic induction”.  An electric conductor is moved through a magnetic field, electric current will flow in the conductor.  So the mechanical energy of the moving wire is converted into the electric energy of the current that flows in the wire.  In a generator The energy conversion occurs when a coil of conducting wire is rotated between two different poles of two permanent magnets. energy conversions in generators © iTutor. 2000-2013. All Rights Reserved
  • 17. energy conversions in photocells  Photocells convert light energy into electrical energy.  Most photocells contain silicon atoms. As long as a light shines on the photocell, electrons gain enough energy to move between atoms.  The electrons are then able to move though a wire to provide electrical energy to a device, such as a calculator. © iTutor. 2000-2013. All Rights Reserved
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