Look that one up in you text book PG:678 that is if you got the same book as my friend<span />
Answer:
A. The bird watcher followed the south trail a distance of five kilometers in 45 minutes.
Two types of mechanical waves: longitudinal<span> waves and </span>transverse<span> waves; the medium movement differs between the two.
</span>In a longitudinal wave the medium particle movement is parallel to the direction of wave propagation; example is sound wave in air.
I<span>n a transverse wave the medium particle movement is perpendicular to the direction of wave propagation; example is mechanical wave on a string.
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ummmm it might be 300... i used a calculator
sorry if it is wrong