Astreet musician sounds the a string of his violin, producing a tone of 440 hz, what frequency does a bicyclist hear as he a) approaches and b) recedes from the musician with a speed of 11.0 m/s?

a)

b)

Explanation:

Let´s use Doppler effect, in order to calculate the observed frequency by the byciclist. The Doppler effect equation for a general case is given by:

where:

Now let's consider the next cases:

The data provided by the problem is:

The problem don't give us aditional information about the medium, so let's assume the medium is the air, so the speed of sound in air is:

Now, in the first case the observer alone is in motion towards to the source, hence:

Finally, in the second case the observer alone is in motion away from the source, so:

the moon affects the earth gravitation ally, causing certain motions of that body and also producing tides in its ocean and atmosphere. the tidal wave in our atmosphere is, however, far too minute to be an effective cause in any known meteorological phenomenon.

explanation:

their crystal patterns have been disrupted by stress