Simply put, a solar panel works by allowing photons, or particles of light, to knock electrons free from atoms, generating a flow of electricity. Solar panels actually comprise many, smaller units called photovoltaic cells. (Photovoltaic simply means they convert sunlight into electricity.)
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Rick Riordan's books follow a similar format compared to the Odyssey. First, there is one or more hero(s), who has to complete tasks or finish trials. These books have mythical creatures and elements, adding to the challenges. When this is complete, they can go home, wherever that may be for them.