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timama [110]
3 years ago
10

HELP?????????????? ????

Biology
1 answer:
Murljashka [212]3 years ago
4 0
THE ANSWER IS C (sorry for caps)
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the frequency of a wave in a stretched string depends on the length L, tension T and linear density m with dimension ML-1 . dedu
spin [16.1K]

Answer:

f = \frac{1 }{L}\sqrt{\frac{T}{m} }

Explanation:

Let the frequency ,

f = L^{x}T^{y}m^{z}

Now the unit of frequency is hertz = s⁻¹ = T⁻¹ where T is time, tension T = kgm/s² = MLT⁻¹ and linear density m = kg/m = ML⁻¹.

So,

T^{-1}  = L^{x}[MLT^{-2} ]^{y}[ML^{-1} ]^{z}\\

collecting the like bases, we have

T^{-1} = [L^{x + y -z}][M^{y + z} ][T^{-2y} ] \\L^{0} M^{0} T^{-1} = [L^{x + y -z}][M^{y + z} ][T^{-2y} ]

Equating powers on both sides, we have

x + y - z = 0  (1)

y + z = 0       (2)

-2y = -1         (3)

From (3), y = 1/2

From (2), z = -y = -1/2

Substituting y and z into (1), we have

x + y - z = 0

x + 1/2 - (-1/2) = 0

x + 1/2 + 1/2 = 0

x + 1 = 0

x = -1

So,

f = L^{x}T^{y}m^{z}\\f = L^{-1}T^{\frac{1}{2} }m^{\frac{-1}{2} }

f = \frac{1 }{L}\sqrt{\frac{T}{m} }

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Some ocean plants, such as photosynthetic algae, benefit when dissolved CO2 levels in ocean water are elevated. Complete the
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