A yacht in the calm lake and the lake to start off and in the process, the fish in the water, the shore flying bird, a people can hear the sound of a motor boat from the distance. If they perceive similar, then they are successively starting boats ()A. bird precedes manB. fish precede birdsC. fish before fishD. bird precedes fish
The speed of sound in the air is 340m/s, so at the same distance, the sound of the motor that is the first to hear the speedboat starts is the fish
The speed of sound is related to the type of medium. Sound travels faster in water than in air (the speed of sound in water is 1500m/s
This is because sound travels slower in the air than in waterSo choose B.
