For the model of a plane in a wind tunne...

For the model of a plane in a wind tunnel , turbulence occurs at a …. Speed for turbulence for an actual plane

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In a test experiment on a model aeroplane in a wind tunnel , the flow speeds on the upper and lower surfaces of the wing are 70ms^(-1)and63ms^(-1) respectively . What is the lift on the wing if its area is 2.5m^(2) ? Take the density of air to be 1.3kgm^(-3) .

A particle is projected horizontally with speed u from the top of a plane inclined at an angle theta with the horizontal. How far from the point of projection will the particle strike the plane?

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A stone of of mass 0 .25 kg tied to the end of a string is whirled round in a circle of radius 1.5 m with a speed of 40 rev//min in a horizontal plane What is the tension in the string ? What is the maximum speed with which the stone can be whirled around If the string can withstand a maximum tension of 200 N ?

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A rectangular box lies on a rough inclined surface. The coefficient of friction between the surface and the box is mu . Let the mass of the box be m. (a) At what angle of inclination 0 of the plane to the horizontal will the box just start to slide down the plane ? (b) What is the force acting on the box down the plane, if the angle of inclination of the plane is increased to a gt theta (c) What is the force needed to be applied upwards along the plane to make the box either remain stationary or just move up with uniform speed ? (d) What is the force needed to be applied upwards along the plane to make the box move up the plane with acceleration a ?

If one were to apply Bohr model to a particle of mass 'm' and charge 'q' moving in a plane under the influence of a mgentic filed 'B' , the energy of the cahrged particle in the n^(th) level will be :-

An aeroplane leaves an airport and flies due west at a speed of 2100 km per hour. At the same time, another aeroplane leaves the same airport and flies due south at a speed of 2000 km per hour. How far apart will be the two planes after 1 hours?

Two discs of moment of inertia I_(1) and I_(2) and angular speeds omega_(1) and omega_(2) are rotating along the collinear axes passing through their center of mass and perpendicular to their plane. If the two are made to rotate combindly along the same axis the rotational K.E. of system will be

KUMAR PRAKASHAN-MECHANICAL PROPERTIES OF FLUIDS -SECTION - B Numerical From Textual Exercise

For solids with elastic modulus of rigidity , the shearing force is pr...
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For a fluid in a steady flow , the increase in flow speed at a constri...
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For the model of a plane in a wind tunnel , turbulence occurs at a …. ...
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Explain why (a) To keep a piece of paper horizontal ,you should blow...
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When we try to close a water tap with our fingers , fast jets of water...
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The size of the needle of a syringe controls flow rate better than the...
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A fluid flowing out of a small hole in a vessel results in a backward ...
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A spinning cricket ball in air does not follow a parabolic trajectory
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A 50 kg girl wearing high heel shoes balances on a single heel . The h...
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Torricell 's barometer used mercury . Pascal duplicated it using Frenc...
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A vertical offshore structure is built to withstand a maximum stress o...
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A hydraulic automobile lift is designed to lift cars with a maximum ma...
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A U- tube contains water and methlated spirit separated by mercury . ...
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In the previous problem , if 15.0 cm of water and spirit each are furt...
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Can Bernoulli's equations be used to describe the flow of water throu...
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Does it matter if one uses gauge instead of absolute pressures in appl...
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Glycerine flows steadily through a horizontal tube of length 1.5m and ...
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In a test experiment on a model aeroplane in a wind tunnel , the flow...
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Figures (a) and (b) refer to the steady flow of a (non -viscous) liqu...
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The cylindrical tube of a spray pump has a cross -section of 8.0cm^(2)...
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