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forsale [732]
3 years ago
12

Which is greater 10 newtons or 5 pounds

Physics
1 answer:
Tpy6a [65]3 years ago
6 0
On Earth, 1 kilogram of mass weighs 9.8 newtons or 2.2 pounds.

        9.8 newtons = 2.2 pounds

        (9.8/2.2) newtons = 1 pound = 4.45 newtons

       (2.2/9.8) pounds  =  1 newton  =  0.225 pound

        5 pounds  =  (5  x  4.45 newtons)  =  22.2 newtons.

        22.2 newtons is more than 10 newtons, so
         5 pounds is more than 10 newtons.
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P_{1}+\dfrac{1}{2}\rho v_{1}^2=P_{2}+\dfrac{1}{2}\rho v_{2}^2....(I)

Firstly we need to calculate the velocity

Using continuity equation

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Q=A_{1}v_{1}

v_{1}=\dfrac{Q}{A_{1}}

v_{1}=\dfrac{40.0\times10^{-3}}{\pi\times(1.5\times10^{-2})^2}

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For output velocity,

v_{2}=\dfrac{40.0\times10^{-3}}{\pi\times(4.5\times10^{-2})^2}

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\Delta P=\dfrac{1}{2}\times1000\times(56.58^2-6.28^2)

\Delta P=1.58\times10^{6}\ N/m^2

(b). We need to calculate the maximum height

Using formula of height

\Delta P=\rho g h

Put the value into the formula

1.58\times10^{6}=1000\times9.8\times h

h=\dfrac{1.58\times10^{6}}{1000\times9.8}

h=161.22\ m

Hence, The pressure and maximum height are 1.58\times10^{6}\ N/m^2 and 161.22 m respectively.

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