Pergunta 5 You need to fill a football with air to play with it. You know that your pump expels air at speed of 8.2 ft/s. The needle of your pump has a radius of 4.5 millimeters. What is the volume flow rate of the air being pumped into the football?
Accepted Solution
A:
The volume flow rate of the air being pumped into the football will be given by: Q=V*A Where V=Speed A=Area You know that your pump expels air at speed of 8.2 ft/s The area of The needle of your pump is A=pi*r^2=pi*((4.5/1000)*(3.28))^2=0.00068442 ft^2 Finally Q=V*A=(8.2 ft/s)*(0.00068442ft^2)=0.005612243 ft^3/s