3 years ago

A bird flies 200 km in 4.5 hours. What is the birds average speed?

Physics

1 answer:

Mazyrski [523]3 years ago

4 0

900km just multiple

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A small artery has a length of 1.10 × 10-3 m and a radius of 2.50 × 10-5 m. If the pressure drop across the artery is 1.15 kPa,

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$7.69533\times 10^{-11}\ m^3/s$

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P = Pressure difference = 1.15 kPa

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$Q=\frac{\pi Pr^4}{8\eta l}\\\Rightarrow Q=\frac{\pi 1.15\times 10^3\times (2.5\times 10^{-5})^4}{8\times 2.084\times 10^{-3}\times 1.1\times 10^{-3}}\\\Rightarrow Q=7.69533\times 10^{-11}\ m^3/s$

The flow rate of blood is $7.69533\times 10^{-11}\ m^3/s$

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