Una sirena y una persona se acercan entre sí con velocidades de 20 m/s cada una. La sirena emite un sonido de 300 Hz de frecuencia. Halle la frecuencia percibida. (Recuerde que la velocidad del sonido es 343 m/s).

La frecuencia percibida es 337,2 Hz.

Step-by-step explanation:

Dado que tanto el emisor del sonido como el receptor se están acercando, la frecuencia percibida es:

  (1)

En donde:

f': es la frecuencia recibida

f: es la frecuencia emitida = 300 Hz

v: es la velocidad del sonido = 343 m/s

es la velocidad del emisor = 20 m/s                                              

es la velocidad del receptor = 20 m/s

Sustituyendo los valores en la ecuación (1) tenemos:

Por lo tanto, la frecuencia percibida es 337,2 Hz.     

Espero que te sea de utilidad!

the most boring ever written

step-by-step explanation:

i am writing something. yes, i plan to make it the most boring thing ever written. i go to the store. a car is parked. many cars are parked or moving. some are blue. some are tan. they have windows. in the store, there are items for sale. these include such things as soap, detergent, magazines, and lettuce. you can enhance your life with these products. soap can be used for bathing, be it in a bathtub or in a shower. apply the soap to your body and rinse. detergent is used to wash clothes. place your dirty clothes into a washing machine and add some detergent as directed on the box. select the appropriate settings on your washing machine and you should be ready to begin. magazines are stapled reading material made with glossy paper, and they cover a wide variety of topics, ranging from news and politics to business and stock market information. some magazines are concerned with more recreational topics, like sports card collecting or different kinds of hairstyles. lettuce is a vegetable.