You are heading toward an island in your speed boat when you see a friend standing on the shore of the island. You sound the boat's horn. Is the wavelength of the sound your friend perceives greater than, less than, or equal to the wavelength that would be heard without any motion of the boat, and why?

Greater than

Explanation:

The Wavelength will be higher than what will be heard without any motion on the boat due to the Doppler Effect, which is the change in the frequency of a sound wave whenever there's a relative motion between the source of the wave and observer. The amount of shift in frequency depends on the speed of the source towards the observer; the higher the velocity of the source, the higher the shift.

hi there!

out of the two, (b) precision would be more reasonable.   however, both a and b could be pretty reasonable.

-awesomerepublic   : )