The trachea divides into two tubes at its lower end. What is the name of these tubes ?

When a person breathers in air, the air enters into his body through an organ A having two holes B in it. The air then passes through pharynx and larynx and enters into a tube C. The tube C divides into two smaller tubes D at its lower end. The two smaller tubes are attached to two respiratory organs E. Each smaller tube divides inside the organs E to form a large number of still smaller tubes called F. The smallest tubes F have air-sacs G at their ends in which gaseous exchange takes place in the body of the person. What are A, B, C, D, E, F and G?

A cylindrical tube of length l has inner radius a while outer radius b. What is the resistance of the tube between (a) its ends (b) inner and outer surfaces ? (The resistivitiy of its material is p)

In a resonance tube experiment, the first and second resonace occur, when the water levels in the tube are 25 cm and 80 cms below the open end respectively . What is the inner diameter of the resonance tube ?

A bent tube is lowered into the stream as shown in the figure below. The velocity of the stream relative to the tube equal to v. The closed upper end of the tube located at the light h_(0) . To what height h will the water jet spurt ?

Water rises to a height h in a capillary tube lowered vertically into water to a depth l as shown in the figure. The lower end of the tube is now closed, the tube is the taken out of the water and opend again. The length of the eater column remaining in the tube will be .

The value of end correction for the pipe open at both the ends is a (If the d is the inner diameter of the tube and r is the radius of the tube .)

The capillary tube is dipped in water vertically it is sufficiently long so that water rises to maximum height h in the tube te length of the portion immersed in water is lgth . The lower end of the tube is closed the tube is taken out and opened again then find length of the water column remaining in the tube.

A bent tube is lowered into water stream as shown in figure. The velocity of the stream relative to the tube is equal to v=2.5m//s . The closed upper end of the tube located at a height of 12cm has a small orifice. To what height h will the water jet spurt ?