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Nerves and brain cells in the brain send electric signals to each other to tell the body what to do.
Like the name suggests, a strain gauge is a device used to measure the strain of an object. The devices electrical resistance varies in proportion to the amount of strain on the device.
The electric motor changes electric energy into mechanical energy.
Electricity is the interaction of many components. These include electric charges, electric fields, electric potentials, electric currents, and electromagnets.
The compound noun 'electric cord' is singular, a word for one cord.The plural noun is 'electric cords'.