Homework Statement
A patient is to be given a blood transfusion. If the inside diameter of the 4.0 cm long
needle is 0.40 mm, the blood pressure in the arm is 2400 Pa, and the required flow is 4.0
cm³/min, how high h should the bottle be placed? (ρ = 1050 kg/m³, η =0.0040 Pa·s)...
But i doubt in my method because the rod's length will decrease by cooling
and it will exert force on supporter
and my equation for solution contain avarege coefficient of linear expansion
not for compression ... understand me ?
i don' what you mean
now see
i found force and it is equal 1013 newten and it is a great force
we have small sample of gas that exert this force on each face of cube
the quastion now ... what is phyiscal reason for that ?
p = 1 atm = 1.013 * 10^5 N/m^2 ( Paskal )
it is known for evret one
and we found force in ( Newten ) so we must convert atm to paskal
now i want the answer for
(d) Comment on the underlying physical reason why such a small sample can exert such a great force.
ok
i found mass from ideal law
then
weight = mg
ok ?
now force = P * A right ?
p = 1 atm = 1.013 * 10^5 N/m^2 . are u sure ?
then i found F
ok
i need comment please
Homework Statement
A steel rod 4.00 cm in diameter is heated so that its temperature increases by 70.0 C. it is then fastened between tow rigid supports. The rod is allowed to cool to its original temperature. Assuming that Young's modulus for the steel is 20.6 * 10^10 N/m^2
and that its...
Homework Statement
A cube 10.0 cm on each edge contains air ( with equivalent molar mass 28.9 gm/mol ) at
atmospheric pressure and temperature 300K. Find (a) the mass of the gas, (b) its weight,
(c) the force it exerts on each face of the cube. (d) Comment on the underlying physical reason...