(a) What is the largest average velocity of blood flow in an artery of radius` 2 xx10-^3 `m if the flow must remain laminar? (b) What is the corresponding flow rate? (Take viscosity of blood to be `2.084 xx 10^-3 `Pa s).

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 velocity of blood flow in an artery of diameter 2 xx10^-3 m if the flow must remain laminar? (b) Do the dissipative forces become more important as the fluid velocity increases? Discuss qualitatively.

In Millikan’s oil drop experiment, what is the terminal speed of an uncharged drop of radius 2.0 xx 10^-5m and density 1.2 xx 10^3 kg m^-3 ? Take the viscosity of air at the temperature of the experiment to be 1.8 xx 10^-5 Pa s. How much is the viscous force on the drop at that speed? Neglect buoyancy of the drop due to air.

What is the excess pressure in a soap bubble of radius 10 mm, if surface tension is 25 Xx 10^-2 N/m?

The rate of a reaction is 1.2xx10^-3 L mol^-1 s^-1 . What is the order of the reaction?

The rate constant of a reaction is 3xx10^2 min^-1 . What is the order of the reaction?

Identify the reaction order from each of the following rate constants. k=2.3xx10^(-4)s^(-1)

The radius of the inner most electron orbit of a hydrogen atom is 5.3xx10^(-11) m. Find out the radii of the n=2 and n= 3 orbits?

In a test experiment pn a model aeroplane in a wind tunnel, the flow speeds on the upper and lower surfaces of the wing are 70 m s^-1 and 63 m s^-1 respectively. What is the lift on the wing if its area is 2.5 m^2 ? Take the density of air to be 1.3 kg m^-3 .