I find that I can blow 1000 cm3 of air through a drinking straw in 1.3 s. The diameter of the straw is 5 mm. Find the velocity of the air through the straw.

Respuesta :

Answer:

Velocity will be equal to 39.153 m/sec

Explanation:

We have given volume v = [tex]1000cm^3[/tex]

This is the volume of cylinder

Diameter is given d = 5 mm

So radius = 2.5 mm = 0.0025 m

Volume of cylinder is equal to [tex]V=\pi r^2h[/tex]

So [tex]1000\times 10^{-6}m^3=3.14\times 0.0025^2\times h[/tex]

h = 50.9 m

Time is given t = 1.3 sec

We have to find the velocity

So velocity will be ratio of distance and time

So [tex]v=\frac{50.9}{1.3}=39.153m/sec[/tex]