A whistle you use to call your hunting dog has a frequency of 21 kHz, but your dog is ignoring it. You suspect the whistle may not be working, but you can't hear sounds above 20 kHz. To test it, you ask a friend to blow the whistle, then you hop on your bicycle.

Answers

Answer 1

Answer:

minimum speed to know if the whistle is working = 16.33m/s

Explanation:

Speed of sound, v= 343m/s

Hearing frequency of dog, f= 21kHz

Hearing Frequency of man, fₐ= 20kHz

Minimum travel speed, vₐ=?

Using the formula;

fₐ=(1-vₐ/v)f

20=(1-vₐ/343)21

(1-vₐ/343)=20/21

vₐ/343=1-0.9524

vₐ=0.0476*343

vₐ=16.33m/s


Related Questions

help with my Spanish please ​

Answers

Answer:

1. Es mi lápiz.

2. Son mis libros.

3. Es tu gato.

4. Son tus perros.

5. Es su mochila.

6. Son sus cuadernos.

7. Es nuestro hermano.

8. Son nuestras mascotas.

9. Es su clase.

10. Son sus primos.

Explanation:

Identifying the narrator and the time that a sentence indicates is the first step that must be taken. this is very important to be able to logically conjugate the verbs, and that these have concordance with what is being expressed, following the instructions given in the activity, to be able to assign the correct adjective to each person.

Answer:

1) Es mi lápiz

2) Son mis libros

3) Es tu gato

4) Son tus perros

5) Es su mochila

6) Son sus cuadernos

7) Es nuestro hermano

8) Son nuestras mascotas

9) Es su clase

10) Son sus primos

Explanation:

Possessive adjectives indicate belonging. These adjectives are divided into two groups of similar length, and the main characteristic of each is its location with respect to the noun:

* the atone possessive adjectives (also called weak) should always be positioned in front of the noun to which they modify, and they are the following: mi, mis, tu, tus, su, sus, nuestro/a/os/as, vuestro/a/os/as.

* Tonic possessive adjectives (also known as strong) should always be placed behind the noun they modify, and have a greater emphasis than the unstressed. They are the following: mío/a/os/as, tuyo/a/os/as, suyo/a/os/as, nuestro/a/os/as, vuestro/a/os/as.

Spanish 1010 (Spanish 1 in college) PLEASE HELP!!!

Answers

Answer:

blanks-

1st corro (I run)

2nd comemos (we eat)

3rd bebe (drinks)

4th escribe (writes)

5th lee (reads)

6th asiste (attends)

7th seran (will be)

8th viveremos (we will live)

Explanation:

I don't think there is an explaination

I answered cause im mexican and know spanish

Corro
Comemos
Bebe
escribe
Lee
Asiste
Serán
Viviremos

A água escoa dentro de um tubo, como mostra a figura abaixo, com uma taxa de escoamento de 0,10 m 3 /s. O diâmetro no ponto 1 é 0,4 m. No ponto 2, que está 3,0 m acima do ponto 1, o diâmetro é 0,20 m. Se o ponto 2 está aberto para a atmosfera, determine a velocidade nos pontos 1 e 2.

Answers

Answer:

A1v1 = A2v2 = 0,1 m 3/ s    

          ⇒ v1  =  0,1 m³/s / π(0,2 m)²

 =  0,8  m/s    

 and       v =  0,1 m³/s / π(0,1 m)²  

 =  3,2  m/s

Segundo, usamos a equação de Bernoulli para determinar a diferença de pressão entre os extremos do tubo:

 

P1 - P2 =  ½ ρ(v2² - v1²) + ρg(h2 - h1)    

 = ½ × 10³ kg/m³ . ((3,2  m/s )² - (0,8  m/s )²) + 10³ kg/m³ . 9,8 m/s² . 3,0  m

 = 34.200 N/m 2

Need some help please ​

Answers

Answer:

1. A nosotros nos gusta pintar.

2. A ti te gusta alquilar vídeos.

3. A mi me gusta navegar por Internet.

4. A ella le gusta patinar.

5. A ellos les gusta levantar pesas.

6. A usted le gusta hablar por teléfono.

Explanation:

Identifying the narrator, gender, number and time indicated by a sentence is the first step that must be taken. This is very important to be able to logically conjugate the verbs, and that these have agreement with what is being expressed.

Answer:

1) A nosotros nos gusta pintar

2) A ti te gusta alquilar videos

3) A mí me gusta navegar por internet

4) A ella le gusta patinar

5) A ellos les gusta levantar pesas

6) A usted le gusta hablar por teléfono

Explanation:

Infinitive verbs are those words that manifest actions and that are not determined by a time, be it present, past, future, or any other.

The tenses of the verbs in infinitive represent their basic forms, since they are in their original form since they are not conjugated in any tense.

Infinitive verbs always end in ar, er, ir.

This means that they indicate the moment in which the action is performed, so that the verbs in infinitive do not have time, nor person, nor number, so they require another verb to complement themselves in addition to always ending in “ar”, "er", "ir".

La 1. ___________________ (last week) yo 2. _____________ (went) a la 3.___________________ (city) de Nueva York.

Answers

Answer:

Answer Below

Explanation:

Semana Pasado

Fui

Ciudad

La semana pasada yo fui a la ciudad de Nueva York

Choose the correct demonstrative adjective to complete each sentence. Compramos ___ pantalones. Question 12 options: esos esas esa ese

Answers

Answer:

The correct answer is: esos.

Explanation:

Demonstrative pronouns are those pronouns that we use to show objects by pointing out their situation with respect to a certain person.

The demonstrative pronouns are divided into three series according to the distance at which the indicated point of the issuer is found. It also presents variations of gender and number.

So we find these series:

"este, esta, esto, estos y estas" denote the closeness of the above regarding the issuer;

"ese, esa, eso, esos y esas" denote the closeness of what has been indicated regarding the receiver;

"aquel, aquello, aquella, aquellos y aquellas" denote distance from what is indicated with respect to the sender and the receiver.

The correct demostrative adjective is esos.
Because the sentence is plural and masculin.
Esos—> plural, masculin
Esas—> plural, feminin
Esa—> singular, feminin
Ese—> singular, masculin
(I’m a spanish student)

Escoge la mejor respuesta de acuerdo al contexto dado.
Cuando quieres saber si algo te queda bien antes de comprarlo, puedes____.

A) probartelo
B) vestirte
C) costar
D) coserlo ​

Answers

a. probártelo snsksjsjjdjc

Answer:

The right answer is, A. Probártelo.

* Cuando quieres saber si algo te queda bien antes de comprarlo, puedes probártelo.

Explanation:

Because according to the context of the prayer a person can try on a garment before buying it, then the option that best describes this situation is A.

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