Complete Question
A commuter train passes a passenger platform at a constant speed of 39.6 m/s. The train horn is sounded at its characteristic frequency of 350 Hz.
(a)
What overall change in frequency is detected by a person on the platform as the train moves from approaching to receding
(b) What wavelength is detected by a person on the platform as the train approaches?
Answer:
a

b

Explanation:
From the question we are told that
The speed of the train is 
The frequency of the train horn is 
Generally the speed of sound has a constant values of 
Now according to dopplers equation when the train(source) approaches a person on the platform(observe) then the frequency on the sound observed by the observer can be mathematically represented as

substituting values


Now according to dopplers equation when the train(source) moves away from the person on the platform(observe) then the frequency on the sound observed by the observer can be mathematically represented as

substituting values


The overall change in frequency is detected by a person on the platform as the train moves from approaching to receding is mathematically evaluated as



Generally the wavelength detected by the person as the train approaches is mathematically represented as



There is half the force that there was before it was split in half
The change in potential energy of this system is = 40 J.
<h3>What is the potential difference?</h3>
The potential difference, often known as voltage, is equal to the amount of current times the resistance. One Joule, or one Volt, of energy is required for one Coulomb of charge to flow from one place in a circuit to another.
<h3>What is the formula for potential difference?</h3>
V=Uq The change in potential energy of a charge q transported from point A to point B, divided by the charge, is what is used to determine the electric potential difference between points A and B, or VBVA. The joules per coulomb unit of potential difference is called the volt (V).
This system's potential energy changed by 40 J.
Energy = charge * potential difference
=> Energy = (8v)*5
=> Energy = 40 J
The change in potential energy of this system is = 40 J.
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26.82m/s
Explanation:
Given:
speed = 60mph
problem: convert to m/s
To solve this problem, we have to find the right and appropriate conversion factor which equals to 1 to multiply this unit with:
we are converting:
miles to meters
hours to seconds
1.609km = 1mile
1000m = 1km
60s = 1 min
60 min = 1hr
Now to convert from mph to m/s
60 x
x 
= 26.82m/s
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Conversion brainly.com/question/1548911
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Answer:
a-
50°C whn converted into K - 323 K