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it saves the world because it is not using battery's

cons:
it takes a lot of energy for the flash light to make the same power as a regular flashlight.

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william, laila, araya, joshua, JP, aime
Pros

a chair that converts energy from the body into eletrical energy

Can charge a device while rocking in the chair

Cons

you have to be physically present and rocking back and forth for the chair to convert body energy into eletrical energy

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Pros: When you use brakes on an energy-capturing bicycle to slow down. Also in stored in a battery as potential energy.

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Pros: When you use brakes on an energy-capturing bicycle to slow down. Also in stored in a battery as potential energy.

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Cons: You need to keep pedaling to store energy.

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 pros: the potential energy stored in the battery so it could be used right away or saved for later. 

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 pros: the potential energy stored in the battery so it could be used right away or saved for later. 

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cons: you have to move the crank so the flash light could pop out.

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by walking the generator turns and converts into kinetic energy to electrical energy and then stores it in a battery as potienal energy.

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the backpack uses kinetic energy to charge batteries.

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extra energy from walking to power radios/ communications devices or flashlights

Cons: you have to walk a little to get any energy and in tight spaces when there are rescue workers crouching or crawling their legs don't go straight so the knee brace wont get too much power if it has already run out of it and has a high risk of breaking because of any debris or rubble falling

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you can't be doing anything else while in the rocking chair except using handheld devices

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Pros: I can straighten my knee again as i'm walking with it cause of the energy i am creating while walking.

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Pros: I can straighten my knee again as i'm walking with it cause of the energy i am creating while walking.

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Cons: I have to walk more than usual to get the full effect of it healing my knee. The energy from my walking will make this process.

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The rescue team cannot use this because in order to generate electrical energy , you have to rock a chair which is a bit difficult .

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You can't do much while you're rocking so unless you have a way to move it, you won't be doing much.

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the motion of walking powers a generator charges a battery. you can use the energy in that battery to charge small devices.

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it can get heavy from the springs inside the bag.

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Raul, Jeannie, George, Gavin, Olivia

How it works: By Bending the knee, the generator converts energy into the battery which charges it and from there you can use the battery to charge anything you'll like.
Pros:
By walking it charges or converts energy into the battery so you can use the battery for something helpful Like a flash light or a walkie talkie or a cell phone.
Cons:
You actully have to excercise to charge the battery. If your not walking then it won't charge so you'll have to be active.

Example: If i'm hiking, the best choice would be the Knee Brace because it would be charging while you walk and would be fully charged by the time you get to your destination.

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Pros: "kinetic energy that was transferred to the bicycle wheel, then transferred to the generator and converted into electrical energy"

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Pros: "kinetic energy that was transferred to the bicycle wheel, then transferred to the generator and converted into electrical energy"

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cons: Without energy you can't go anywhere your stuck in one spot.