How does water flow through a sponge?

In most simple type of canal system of porifera, water flows through which one of the following ways

When does the current flow through the following circuit ?

During osmosis, flow of water through a semipermeable membrane is:

The water flowing through the same tube having two different cross section areas has different flow rates .

16cm^(3) of water flows per second through a capillary tube of radius a cm and of length l cm when connected to a pressure head of h cm of water if a tube of the same length and radius a/2 cm is connected to the same pressure head the quantity of water flowing through the tube per second will be-

A tank with a small orifice contains oil on top of water. It is immersed in a large tank of the same oil. Water flows through the hole. Assuming the level of oil outside the tank above orifice does not change. a. What is the velocity of this flow initially? b. When the flow stops, what would be the position of the oil-water interface in the tank? c. Determine the time at which the flow stops. Density,of oil 800kg//m^(3) .

Water flows from the

Figure shows how the stream of water emerging from a faucet necks donw as it falls. The area changes from A_(0) to A through a fall of h. At what rate does the water flow from the tap ?

Can Bernoulli's equation be used to describe the flow of water through a rapid in a river? Explain.

Blood flows through sinuses in