At an auto race, a member of the pit crew stands beside the track. a car approaches him at 100 m/s and emits a sound at frequency 1100hz. the air is still and the speed of sound is 340mls. what frequency will the pit crew member hear? a.1560hz b.1420hz c.1640hz d.850hz

As per the formula of Doppler's effect we know that

now we know that

v = 340 m/s

now we will have

so the frequency heard by the crew will be approx 1560 Hz

the arctic is a region of the planet, north of the arctic circle, and includes the arctic ocean, greenland, baffin island, other smaller northern islands, and the far northern parts of europe, russia (siberia), alaska and canada.