By default, the GPIO pains in raspberry Pi are configured as?
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A powerful feature of the Raspberry Pi is the row of GPIO (general-purpose input/output) pins along the top edge of the board. Any of the GPIO pins can be designated (in software) as an input or output pin and used for a wide range of purposes.
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When liquid in the cement the following will has happened to the liquid in the cement: The water present in the liquid cement goes into a reaction with the minerals of calcium silicate in the cement. The result of this reaction is the hydrate crystals of calcium silicate which are needle-shaped in nature.
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