vorcil
Apr30-09, 10:04 AM
Imagine a hollow cylinder filled with water (a water tank)
a hole is near the bottom of the cylinder
the hole is covered, the tank filled with water and then the hole is uncovered
the volume flow rate = Q
h = the height of the hole from the water level
Q = Pi*r^2 * (squareroot 2gh)
(i solved this from)
q=av (area * velocity)
area of cylinder = pi R^2
velocity as it leave the hole = Squareroot (2gh) -> (h being the height from the hole to the water level)
after doing the experiment and graphs and stuff i got the velocity of the water jet to be 2.816 ms^-1
question:
would the velocity be different if i had mercury in the cylinder instead of water?
i know the velocity is determined by \sqrt{}(2gh)
so the density and mass of the liquid shouldn't make a difference!
but that made me think, what if i put something like honey or treacle into the cylinder.
it would definitely be slower, So wouldn't \sqrt{}(2gh) be wrong? even though my text book says to use that formula?
a hole is near the bottom of the cylinder
the hole is covered, the tank filled with water and then the hole is uncovered
the volume flow rate = Q
h = the height of the hole from the water level
Q = Pi*r^2 * (squareroot 2gh)
(i solved this from)
q=av (area * velocity)
area of cylinder = pi R^2
velocity as it leave the hole = Squareroot (2gh) -> (h being the height from the hole to the water level)
after doing the experiment and graphs and stuff i got the velocity of the water jet to be 2.816 ms^-1
question:
would the velocity be different if i had mercury in the cylinder instead of water?
i know the velocity is determined by \sqrt{}(2gh)
so the density and mass of the liquid shouldn't make a difference!
but that made me think, what if i put something like honey or treacle into the cylinder.
it would definitely be slower, So wouldn't \sqrt{}(2gh) be wrong? even though my text book says to use that formula?