Q.31:- (a)It is known that density ρ of air decreases with height y as ρ0e-y/y0 Where ρ0 = 1.25 kg m-3 is the density at sea level, and y0 is a constant. This density variation is called…

Q.31:- (a)It is known that density ρ of air decreases with height y as ρ0e-y/y0 Where ρ0 = 1.25 kg m-3 is the density at sea level, and y0 is a constant. This density variation is called…

Q.30:- Two narrow bores of diameters 3.0 mm and 6.0 mm are joined together to form a U-tube open at both ends. If the U-tube contains water, what is the difference…

Q.29:- Mercury has an angle of contact equal to 140° with soda lime glass. A narrow tube of radius 1.00 mm made of this glass is dipped in a trough containing…

Q.29:- In Millikan’s oil drop experiment, what is the terminal speed of an uncharged drop of radius 2.0 × 10–5 m and density 1.2 × 103 kg m–3? Take the viscosity of air…

Q.27:- A plane is in level flight at constant speed and each of its two wings has an area of 25 m2. If the speed of the air is 180 km/h…

Q.26:- (a)What is the largest average velocity of blood flow in an artery of radius 2 × 10–3 m if the flow must remain laminar? (b) What is the corresponding flow…

Q.25:- In deriving Bernoulli’s equation, we equated the work done on the fluid in the tube to its change in the potential and kinetic energy. (a) What is the largest average…

Q.24:- During blood transfusion the needle is inserted in a vein where the gauge pressure is 2000 Pa. At what height must the blood container be placed so that blood may…

Q.23:- Two vessels have the same base area but different shapes. The first vessel takes twice the volume of water that the second vessel requires to fill upto a particular common…

Q.22:- A manometer reads the pressure of a gas in an enclosure as shown in Fig. 10.25 (a) When a pump removes some of the gas, the manometer reads as in…