1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Vikentia [17]
2 years ago
6

Two cars are moving towards each other and sound emitted by first car with real frequency of 3000 hertz is detected by a person

in second with apparent frequency of 3400 Hertz what was the speed of cars
Physics
1 answer:
sertanlavr [38]2 years ago
3 0

Answer:

 v ’= 21.44 m / s

Explanation:

This is a doppler effect exercise that changes the frequency of the sound due to the relative movement of the source and the observer, the expression that describes the phenomenon for body approaching s

           f ’= f (v + v₀) / (v-v_{s})

where it goes is the speed of sound 343 m / s, v_{s} the speed of the source v or the speed of the observer

in this exercise both the source and the observer are moving, we will assume that both have the same speed,

                v₀ = v_{s} = v ’

we substitute

               f ’= f (v + v’) / (v - v ’)

               f ’/ f (v-v’) = v + v ’

               v (f ’/ f -1) = v’ (1 + f ’/ f)

               v ’= (f’ / f-1) / (1 + f ’/ f) v

               v ’= (f’-f) / (f + f’) v

let's calculate

                v ’= (3400 -3000) / (3000 +3400) 343

                v ’= 400/6400 343

                v ’= 21.44 m / s

You might be interested in
anice is watching her granddaughter drive a Barbie Jeep with a 6 V battery and an electric motor with 5 ohm of resistance. How m
Scrat [10]

Answer:

Power required will be 7.2 watt

Explanation:

We have given battery of Barble jeep is 6 volt

So potential difference V = 6 volt

Resistance of electric motor R = 5 ohm '

We have to find the power motor using to drive the jeep

Power is given by P=\frac{V^2}{R}, here V is voltage and R is resistance

So P=\frac{V^2}{R}=\frac{6^2}{5}=7.2watt

5 0
3 years ago
Read 2 more answers
A 2.3 kg block of copper is heated at atmospheric pressure such that its temperature increases from 6 oC to 90 oC. How much heat
Shtirlitz [24]

Answer:

the  heat absorbed by the block of copper is 74368.476J

Explanation:

Hello!

To solve this problem use the first law of thermodynamics that states that the heat applied to a system is the difference between the initial and final energy considering that the mass and the specific heat do not change so we can infer the following equation

Q=mCp(T2-T1)

Where

Q=heat

m=mass=2.3kg

Cp=0.092 kcal/(kg C)=384.93J/kgK

T2=Final temperatura= 90C

T1= initial temperature=6 C

solving

Q=(2.3kg)(384.93\frac{J}{kgC} )(90C-6C)=74368.476J

the  heat absorbed by the block of copper is 74368.476J

7 0
3 years ago
After turning off the television, you approach it. As you get close, but not touching it, the hairs on your arm start to stand u
Amanda [17]

The answer is D) induction.

6 0
2 years ago
Read 2 more answers
When describing electromagnetic radiation, there is a(n) _____________ relationship between wavelength and frequency and the gre
disa [49]

Its actually C. I did the question on USA test prep and it said the correct answer was C.


6 0
3 years ago
Read 2 more answers
3. Explain why it is, regardless of the location, at a certain distance between the two points, you will perceive the two points
faust18 [17]

Answer:

Hello your question is missing some parts attached below is the missing part of your question

answer: <em>many primary sensory Neurons will converge and become a single Neuron and the single Neuron will send a single harmonized signal to the Brain</em>.

Explanation:

The reason regardless of the location that will make you perceive the two points as a single point rather than as two distinct points is that many primary sensory Neurons will converge and become a single Neuron and the single Neuron will send a single harmonized signal to the Brain.

3 0
2 years ago
Other questions:
  • When the Voyager I and Voyager II spacecraft were exploring the outer planets, NASA flight controllers had to plan the crafts' m
    13·1 answer
  • Maritime climates can be expected in the middle of large continents.<br><br> True<br> False
    8·1 answer
  • How do you calculate Friction force without the coefficient of friction
    11·1 answer
  • A proton moves at a speed 1.4 × 10^7 m/s perpendicular to a magnetic field. The field causes the proton to travel in a circular
    15·1 answer
  • Asexual reproduction provides an advantage to organisms under which of the following conditions?
    8·1 answer
  • A steel cable of diameter 3.0 cm supports a load of 2.0kN. What is the fractional length increase of the cable compared with the
    11·1 answer
  • In a chemical reaction, substances react in a specific ratio. Chemical reactions are used to make many products, including food.
    10·1 answer
  • An ion of Mg has a different number of ________ than other atoms of Mg.
    13·1 answer
  • A bullet is shot from a rifle with a speed of 3,015 feet per second. Assuming the billet moves at a constant velocity what is th
    9·1 answer
  • A 45 kg merry go round worker stands on the rides platform 6.3 m from the center. If her speed as she goes around the circle is
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!