Can any one solve these for me ?

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The discussion revolves around solving three physics problems involving sound frequency calculations using the Doppler effect, optics with a diverging lens, and energy calculations for falling water. The first problem requires calculating the frequency perceived by a listener under different motion scenarios relative to a stationary sound source. The second problem involves determining the object and image locations for a diverging lens with a given focal length and magnification. The third problem focuses on calculating the power generated by water falling from a height and the work done by the water. Participants are encouraged to show their attempted work for guidance rather than asking for complete solutions.
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1) calculate frequencies by a listener under the following circumstances.a)a listner moves with a velocity of 60km/hr directly towards a stationary source emitting sound waves of frequency 2000hz.
b)source is moving directly towards listener with a velocity of 60 km/h,observer is at rest. c)source and listener both are moving toward each other with velocity 50km/h.
2) a diverging lens of focal length 15cm porduces of image of magnification one third.
i)where is the object located.
ii)where is the image located.
iii)draw graphical representation.
3) water falls over waterfall of height 50m at a rate of 5000 cubic per minute. determine the power generated.if water takes 10 minutes to reach the ground and also calculate work done by water.


THANX
 
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Apply the doppler effect
Apply the magnification formula
Apply Energy Equations
 
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