Question
Just a few physics questions that I'm super confused about: I don't expect someone to answer them all, even an answer to one or two would help so much. Thank you.
(a) the liquid flow speed
___ m/s
(b) the liquid pressure
___ Pa
Just a few physics questions that I'm super confused about: I don't expect someone to answer them all, even an answer to one or two would help so much. Thank you. The motor of your dune buggy is fueled by a gas line with a radius of 3.20 X 10^5 Pa to a section of pipe with a cross-sectional area of 3.50 cm^2. The density of the citric acid is 1660 kg/m^3. For the section of smaller pipe, determine the liquid flow speed and the liquid pressure. (a) the liquid flow speed ___ m/s (b) the liquid pressure ___ Pa X 10^-3 m^3 of this fluid, determine the mass flow rate in kg/s. ___ kg/s As a person breathes, during the inhale part of the cycle air moves down the windpipe (bronchus) and through a constriction where the air speed doubles. If the air is traveling 21 cm/s before the constriction and we treat air as an incompressible fluid, determine the pressure drop in the constriction. Use the density of air as 1.29 kg/m^3. ___ Pa At a soft drink bottling plant, a horizontal section of pipe carrying citric acid in liquid form goes from a cross-sectional area of 8.00 cm^2, fluid flow speed of 320 cm/s, and pressure of 1.40 X 10^-2 kg/s. If the density of the gas you are using is 730 kg/m^3, determine the speed at which gas travels through the fuel line. ___ m/s A standard after-surgery intravenous fluid has a density of 1125 kg/m^3. If during the first seven hours after surgery a patient is to receive a volume of 1.14 x 10^-3 m and the fuel pump is rated at 5.25
Explanation / Answer
in second problem ... we are given density , time and volume
we have to calculate mass flow rate or mass tranfered per sec
we will calculate mass using m = density*volume = 1125*1.14*10^-3 kg 1.2825 kg
now this mass is transfered in 7 hours or 7*3600 secs or 25200 secs
so mass flow rate would be 1.2825/25200 kg/sec or 5.09*10^-9 kg/sec
