FISH (STREAMLINED)

The figure shows a non-viscous, incompressible and steady flow in front of a sphere. A-B is a horizontal streamline. It is known that the fluid velocity along this streamline is given by V=V_(0)(1+(R^(3))/(x^(3))).V_(0) is velocity of flow on this streamline when xrarr(-oo) . It is given that pressure at xrarr(-oo) is P_(0) and density of liquid is rho . (i) Write the variation of pressure along the streamline from pointA, far away from the sphere, to point B on the spehre. (ii) Plot the variation of pressure along the streamline from x=-oo to x=-R.

Assertion (A) : Cat fishes are best culturable fishes . Reason (R) : Cat fishes survive even at high temperature and low oxygen.

Which of the following belongs to Phylum Arthropoda? (1) Cockroach (2) Gold fish (3) Silver fish (4) Cuttle fish

Superclass Pisces Class3 osteichthyes Lung fishes || Types OF Scales In Fishes || Fresh Watered And marine Fishes || Important points

Fishes are

Statement-1: The body of Pisces is streamlined that helps in swimming. Statement-II: Fishes breathe through gills

Why do the speedy fishes and marine mammals have similar streamlined (fusiform) bodies even though they have different origin and are unrelated?

For a stream line flow of water following statements are given below (a) Two streamlines do not intersect each other. (b) streamlines must be straight. (c ) streamlines flow is more likely for liquids with low density and height viscosity. (d) streamlines flow is more likely for liquids with high density and low viscosity.

Consider the following characteristic of fishes :- (1) They have four pairs of gills which are covered by an operculum. (2) They have air bladder which regulates buoyancy (3) They are mostly viviparous and development is direct (4) Their body is streamlined and covered with cycloid/ctenoid scales Which of the above characteristics regarding bony fishes are correct?

Streamlines: (sqrt2+sqrt3)/2