The first form of electric communication was called Morse Code. It uses long and short electric pulses (beeps) to encode letters. It is still used today.
Answer:
D
Explanation:
A catalyst speeds up a chemical reaction, without being consumed by the reaction. It increases the reaction rate by lowering the activation energy for a reaction.
<span>The name given to the semiconductor device that has 3 or more elements is a Transistor</span>
Answer:
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Not completely understanding what the question is