Question:

What are energy changes?

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I need help to this question:

What are the energy changes in the following:

Hydroelectricity

Solar hot water panels

Solar cells

Burning ethanol

I really need help with this question and i need it really soon. I can't find anything on the internet. Please tell me the full answer, what energy changes are or a website that will help me.

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  1. It seems to be about:

    1. Rotation of turbines (kinetic) energy to electrical

    2. Radiated to heat

    3. Radiated (sunlight) to electrical

    4. Chemical energy to heat

    PS I was class dunce but this might get you started

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