The electrical current (or signal) travels at about 2/3 the speed of light in a vacuum - that is, it travels at approximately 200,000 km/sec. Note that individual electrons move slower than that.
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1,000 milliseconds
Exactly as it sounds. It is 100 times shorter than a second.
The answer is in the question. 40 m/s is how fast it is going. This means in one second, the object has traveled 40 meters. Relatively fast compared to walking or driving.
That depends on how fast one is traveling.
Two lengths