Energy can occur in different forms Energy can

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Energy can occur in different forms. Energy can change between one form and another.

Energy can occur in different forms. Energy can change between one form and another. Energy is not created Energy can not be destroyed………. Energy only changes forms This is called the “conservation of energy” 1 st law of Thermo dynamics

Different Forms of Energy Light Elastic Thermal Chemical Nuclear Kinetic Electrical Potential Sound

Different Forms of Energy Light Elastic Thermal Chemical Nuclear Kinetic Electrical Potential Sound

Light Energy Any form of light contains energy This is the only form of

Light Energy Any form of light contains energy This is the only form of energy we can see(although we can’t see all of the different types of light energy). Infrared Ultraviolet Visible light (to humans) X-ray Energy in light often gets converted to heat Light energy can also be converted to chemical energy (photosynthesis)

Thermal Energy The energy of heat A hotter object has more thermal energy than

Thermal Energy The energy of heat A hotter object has more thermal energy than the same object when it is cooler. Examples of objects with lots of thermal energy: A glowing red hot piece of metal The Sun

Nuclear Energy The energy released during nuclear reactions Examples Atomic The of Nuclear energy:

Nuclear Energy The energy released during nuclear reactions Examples Atomic The of Nuclear energy: Bombs Sun Nuclear power plants

Electrical Energy The energy carried by moving electrons Electricity Examples of Electrical energy: Batteries

Electrical Energy The energy carried by moving electrons Electricity Examples of Electrical energy: Batteries Your wall socket

Sound Energy Any audible or inaudible sound demonstrates sound energy. It is associated with

Sound Energy Any audible or inaudible sound demonstrates sound energy. It is associated with the vibrations of molecules and atoms.

Elastic Energy Anything that can stretch or compress and then come back to it’s

Elastic Energy Anything that can stretch or compress and then come back to it’s original shape is considered elastic Examples: Rubber bands, balloons, and springs.

Chemical Energy The energy in chemical bonds Breaking chemical bonds or forming new ones

Chemical Energy The energy in chemical bonds Breaking chemical bonds or forming new ones release this energy. (Chemical Reactions) Examples: Exploding Fireworks

Chemical Energy in Gasoline to kinetic energy of a car. Gasoline combusts releasing chemical

Chemical Energy in Gasoline to kinetic energy of a car. Gasoline combusts releasing chemical energy Explosion moves a piston Piston moves the cam shaft and eventually the tires causing the car to move. Thus transforming chemical energy to kinetic energy. Byproduct: Thermal Energy, so not all of the Chemical energy is transformed to kinetic energy. PAY ATTENTION TO THIS!!!! It’s at the end of your notes

Kinetic Energy The energy of motion or movement The same object moving faster will

Kinetic Energy The energy of motion or movement The same object moving faster will have more kinetic energy than if it was moving slower. Examples of objects with kinetic energy: A speeding race car A ball flying through the air Formula K =½*M*V 2

Potential Energy – (Gravitational) Ug Stored Energy (due to gravity) The same object higher

Potential Energy – (Gravitational) Ug Stored Energy (due to gravity) The same object higher off the ground will have more potential energy than if it was closer to the ground Examples of objects with potential energy: A roller coaster at the top of a ramp Water behind a dam A ball being held in the air Ug = ½*M*G*H

Transforming Kinetic Energy to Potential Energy As an object falls or rolls to the

Transforming Kinetic Energy to Potential Energy As an object falls or rolls to the ground the potential energy is transformed into kinetic energy

Transforming Kinetic Energy to Potential Energy

Transforming Kinetic Energy to Potential Energy

Transforming Kinetic Energy to Thermal Energy This transformation occurs through friction Rub your hands

Transforming Kinetic Energy to Thermal Energy This transformation occurs through friction Rub your hands together and you should feel them get warm. That is the kinetic energy of motion in your hands being transformed into thermal energy which you feel as heat.

Energy Transformations Potential Energy in the water behind a hydroelectric dam to kinetic energy

Energy Transformations Potential Energy in the water behind a hydroelectric dam to kinetic energy of a ceiling fan. Chemical Energy in Gasoline to kinetic energy of a car.

Potential Energy in the water behind a hydroelectric dam to kinetic energy of a

Potential Energy in the water behind a hydroelectric dam to kinetic energy of a ceiling fan. Potential Energy (the water) Kinetic energy (the water falling, and spinning a turbine) Electrical Energy (generated by the turbine) Kinetic Energy of your spinning fan

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