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maw [93]
3 years ago
14

a man can row a boat at 4 km per hour in still water. he rolls the boat two kilometre upstream and 2 kilometre back to a startin

g place in 2 hours how fast is the stream flowing​
Physics
2 answers:
stiv31 [10]3 years ago
5 0

Answer:

I would say since it is still water the stream flow is 0km/h. Especially because he needs the same time upstream as He does down stream.

FromTheMoon [43]3 years ago
3 0

Answer:

sorry I don't give answers

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A duck is 12 m from the edge of a pond. A student stands in the middle of the pond
olganol [36]

Answer:

The wavelength is 2 meters

Explanation:

The relationship between the frequency, the speed and the wavelength is given by the relation;

v = f × λ

The given parameters are;

The distance of the duck from the edge of the pond = 12 m

The number of ripples produced per second = Frequency, f = 2 Hz

The time it takes the ripple to reach the edge of the pond after travelling past the duck = 3 seconds

Therefore, speed of the wave, v = Distance/time = 12 m/(3 s) = 4 m/s

The wavelength, λ, is therefore;

λ = v/f = (4 m/s)/(2 Hz) = 2 meters.

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4 years ago
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What is the maximum frequency of visible light in hertz?
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