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Energy
What is energy ?
Is the capacity of an objet to
transform an energy source into
work.
Maria Díez
Julissa Calero
TYPES OF
ENERGY
Mechanial energy :
Kinetic energy
 Potencial energy

Electrical energy.
Electromagnetic energy.
Sound energy.
Chemical energy.
Nuclear energy.
Thermal energy.
POWER
The power of machine is the quantity of work it can
do in a unit of time
P= W/t
P = Power measured in watts
W=Work measured in joules.
T = Time measured in seconds
UNITS OF ENERGY
JOULES


1000j = 1kj
There are used to
measured larger
quantities of energy
CALORIES


1 cal = 4,18 joules
There are used to
measured larger
quantities of heat
TRANSFORMATION OF ENERGY
1.
4.
Chemical energy
Electrical energy
Elctrical energy
Luminous energy
2.
5.
Nuclear energy
Metabolic energy
Luminous and
Kinetic energy
Thermal energy
3.
6.
Chemical energy
Chemical energy
Mechanical
Thermal and sound
energy,movement and heat.
7.
Electrical energy
Kinetic and thermal energy and movement
THEY
ENERGY SOURCES
ARE NATURAL RESOURCES THAT PROVIDE DIFFERENT FORMS
OF ENERGY.
Non-renewable
They are energy sources that come from natural resources that are
limited.
Nuclear energy:
Natural Gas:
Nuclear fusion.
Extraction by drilling
Nuclear fission.
Is transported liquefaction
Coal:
Extraction: Open-cast mines
Underground mines
Petroleum:
Extration : By drilled in ground or under the sea.

Hydraulic energy:
It is produced by the movement of water.

Solar energy:
It is produced by the ultraviolet ray of the sun.

Wind energy :
It is produced by the mechanical energy that
is produced by the wind.

Marine energy
There are 3 types:
 Tidal energy.
 Wave energy.
 Ocean thermal energy

Geothermal energy
This energy comes from the heat stored in t he
earth´s crust

Biomas:
This is produced from plant remains, forest and
agricultural waste.

Municipal solid waste.
This is generated in cities.
They
come
from
unlimited
natural
resources.
HEAT ENGINES
1.1 Combustion Engine:
1. Intake
2.Compression 3.Combustion-power 4.Exhaust
1.2 Two-stroke engine
This engine is the
same that combustion
engine but the
different
is that this engine
have
2 openings and the
mixture is in the inside
1.3 THE DIESEL ENGINE
Air
Compressed
High
temperature
Fuel
Spark
1.3 TURBOJECT
Air
Air +
Fuel
Spark
Energy
Capacity of an object
to tranform an energy
source into work
Types:
Mechanical, nuclear,
thermal, chemical,
electrical,
electromagnetic, sound.
Energy cannot be
created or destroyed it
can only be tranform
IT can be measured
in joules and calories.
Energy sources
Natural resources that
provide different forms of
energy
Non-renewable:
Nuclear energy that
come from fossil
fuels.
Renewable:
Hydraulic, solar,
wind, marine,
geothermal.
Heat engines
Tranform thermal
energy from fuel into
mechanical energy to
perform work.
External
combustion:
Combustion engine
and steam engine
Internal combustion:
Turboject
THIS IS THE
UNIT OF ENERGY
Thanks for waching