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Energy. The balloon was filled with Hydrogen . Along with Oxygen, the contents of the balloon combined to form water . The energy stored in the balloon is ALL chemical What forms of energy did this transform into? Heat , Mechanical, Radiant, Sound. L.o.C.o.E.

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Energy

Energy

The balloon was filled with Hydrogen .

Along with Oxygen, the contents of the balloon combined to form water.

The energy stored in the balloon is ALL chemical

What forms of energy did this transform into?

Heat , Mechanical, Radiant, Sound


L o c o e
L.o.C.o.E.

The amount of energy we started with is

more than

equal to

less than

the amount we ended with.


L o c o e1
L.o.C.o.E

  • Energy cannot be Created!

  • Energy cannot be Destroyed!

  • Energy can ONLY be Transformed!

  • This simple set of statements is called the Law of Conservation of Energy.

  • When any energy is transformed, heatis always released.


The basics
THE BASICS:

  • Energy can be measured with two basic units: Caloriesand Joules

  • Energy can be found in two (2)different TYPES!

  • POTENTIAL ENERGY: stored

  • KINETIC ENERGY: moving


The basics1
THE BASICS:

  • Energy is found in 7different FORMS!

  • Most energy forms can be found as both types.

  • Some cannot be stored by themselves, only transformed into from other forms.


Chemical energy

CHEMICALENERGY


Chemical energy1
CHEMICAL ENERGY:

  • Chemical energy is stored in chemical bonds

  • Plants use a process called photosynthesisto store the sun’s energy as sugars in fruits and roots.

  • CO2 + Water + ENERGY→ Sugar + Oxygen gas

  • The plant takes in the raw materials of CO2and waterand then uses the sun’s radiant energy to “glue” them together.


Chemical energy2
CHEMICAL ENERGY:

  • Chemical energy is used when bondsare broken.

  • We eat the sugar and use the energy to make chemicals that we need to live. This is called respiration

    Sugar + Oxygen gas → CO2 + Water + ENERGY

  • The amount of Calories in our food can be determined by burning the food in a calorimeter


Heat energy

HEATENERGY


Heat energy1
HEAT ENERGY:

  • Heat occurs whenever particles collide

  • Two things happen when heat is added to particles speed upand spread out

  • The average speed of particles is called temperature


Heat energy2
HEAT ENERGY:

  • Heat ALWAYS travels from HOTto COLD until temperatures are the same.

  • “Cold” refers to something that has less heatthan something else.

  • When something gets “cold”, heat is being removed


Heat energy3
HEAT ENERGY:

  • Conduction- direct contact with temperature differences

  • Convection- circulation within a fluid (liquids and gases )

  • Radiation- an electromagnetic wave called INFRARED.


Electrical energy

ELectricalENERGY


Electrical energy1
ELECTRICAL ENERGY:

  • Electricity is usually stored as chemical energy.

  • One chemical gives electrons; the other takes electrons.

  • Static electricity can occur when there is a buildup of electrons.

  • Opposite charges attract

  • Like charges repel


Electrical energy2
ELECTRICAL ENERGY:

  • The balloon has been rubbed on your hair. Draw the charges you would find on the balloon and the wall.

Wall


Electrical energy3
ELECTRICAL ENERGY:

  • Two balloons have been rubbed on your head. Draw their interaction in the space below.


Electrical energy4
ELECTRICAL ENERGY:

  • You place your hand on the Van de Graaf generator. Draw your hair AND the charges you would predict.


Electrical energy5
ELECTRICAL ENERGY:

  • Electricity refers to the flow of electrons

  • A circuit must be closed (completed) for electrons to flow.

  • There are two types of circuits

    series and parallel


Electrical energy6
ELECTRICAL ENERGY:

  • SERIES CIRCUIT

    • Shares the voltage

    • Adding a light makes all of them dimmer

    • One goes out…they all go out


Electrical energy7
ELECTRICAL ENERGY:

  • PARALLEL CIRCUIT

    • All receive maximum voltage

    • Adding a light changes nothing

    • One goes out…the rest stay on


Electrical energy8
ELECTRICAL ENERGY:

  • Voltage (Volts): electrical pressure (the umpf behind the electrons)

    Amperage (Amps): the frequency of electrons


Mechanical energy

mechanicalENERGY


Mechanical energy1
MECHANICAL ENERGY:

  • Also called gravitational potential energy:

    P.E. = mgh

    P.E. = mass X gravity X height

    kg m/s2 m


Mechanical energy2
MECHANICAL ENERGY:

  • Kinetic Energy – The energy of motion

    K.E. = ½ mv2

    K.E. = ½mass X velocity2

    kg m/s



Nuclear energy

nuclearENERGY



Nuclear energy2
NUCLEAR ENERGY:

Nuclear energy holds the nucleus together. It would love to fly apart!


Nuclear energy3
NUCLEAR ENERGY:

Nuclear fission is when the

nucleus of large atoms is split.



ControlledFission !!!


Radiant energy

radiantENERGY


Radiant energy1
RADIANT ENERGY:

  • What is light? An electromagnetic wave


Radiant energy2
RADIANT ENERGY:

Light is produced when a charged particle is vibrated.


Radiant energy3
RADIANT ENERGY:

EM waves travel at the “speed of light” which is… 300,000,000 m/s or

300 thousand km/s


Radiant energy4
RADIANT ENERGY:

What is a wavelength?


Radiant energy5
RADIANT ENERGY:

Which wavelengths have the most / least energy?

  • Name some types of light in the spaces below.


Radiant energy6
RADIANT ENERGY:

What wavelengths of light CAN been seen by humans?


Sound energy

soundENERGY


Sound energy1
SOUND ENERGY:

  • Sound is a wave of matter


Sound energy2
SOUND ENERGY:

  • Sound cannot travel through a vacuum.

  • Sound travels slowest through a GAS, fastest through a SOLID.


Sound energy3
SOUND ENERGY:

  • What is frequency?

    • The number of wavelengths that pass by a point in one second.

    • Measured in Hertz

  • What is pitch?

    • Refers to how high or low a tone is


Sound energy4
SOUND ENERGY:

  • Doppler Effect:


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