Stuck on this one Question 13.) A: If one trillion water molecules are added to
ID: 3899170 • Letter: S
Question
Stuck on this one
Question 13.)
A: If one trillion water molecules are added to one end of a filled garden hose, what happens at the other end of the garden hose?
B: As fluid density increases, the fluid speed (increases / decreases / stays the same) and the pressure (increases / decreases / stays the same). Explain your answers.
C: Imagine two identical houses, one at the top of a hill and one at the bottom of a valley. In which one would you rather take a shower? Why?
D: Shower pipes in newer houses have smaller diameters than those in older houses. Why do you suppose this is?
Explanation / Answer
A)
One trillion water molcules will come out from other end of the hose. (Mass conservation)
B)
Speed and Pressure remain the same if density is changed. They are independent variables.
C)
In the bottom of the valley because pressure will be higher there. (P + 1/2*rho*V^2 + rho*g*z = constant. As z increases, P decreases.)
D)
Reducing the diameter will increase the increase the velocity. (Q = VA = constant)