A keyboard typically uses electrical energy to operate. When you press a key, it completes an electrical circuit to send a signal to the computer, allowing you to input commands or characters.
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Bones do not directly utilize energy for movement. Muscles, which are attached to bones, require energy in the form of adenosine triphosphate (ATP) to contract and generate movement. The bones themselves do not use energy for movement.
Kinetic energy is the energy of motion that an object possesses while it is in use. It is dependent on the object's mass and velocity.
Scissors use mechanical energy when they are being used to cut material. This energy is generated by the person's muscle movements when opening and closing the scissors.
Scissors use mechanical energy when they are used to cut objects. The energy is transferred from the user's hand to the blades of the scissors, enabling them to perform cutting action.
Most clocks use electrical energy, which can come from either batteries or an electrical outlet. Some clocks, such as wind-up or pendulum clocks, use mechanical energy stored in springs or weights.