Sound travels much slower than light, whether in air or water.
Light travels at 186,000 miles per second.
Sound travels at 770 miles per hour.
You often hear things after you see them; for example, you see the lightning before you hear the thunder.
Electric current is measured in amperes (amps).
The word robot has been derived from a Czech word 'robota' that means 'drudgery'.
The field in which we study robots is known as Robotics.
Unfortunately not the ones with chocolate chips.
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