Is the capacity of an objet to transform an energy source into work.

What is energy ?

Energy

Maria DíezJulissa 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

1000j = 1kj

There are used to measured larger quantities of energy

1 cal = 4,18 joules

There are used to measured larger quantities of heat

JOULES CALORIES

TRANSFORMATION OF ENERGY

4.Luminous energy Elctrical energy

5. Metabolic energy Kinetic energy 6. Chemical energy Thermal and sound energy,movement and heat.

1.Chemical energy Electrical energy

2.Nuclear energy Luminous and Thermal energy

3. Chemical energy Mechanical

7.Electrical energy Kinetic and thermal energy and movement

ENERGY SOURCESTHEY 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.

They come from unlimited natural resources.

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.

RENEWABLE

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

HEAT ENGINES

Gases = Motion of

piston

Fuel + Air =

Spark

Spark =

Gases

1.3 THE DIESEL ENGINE

Air Co

mpressed

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