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Stokes' Formula: When a spherical object falls by the fluid, layer in immediate touch with it, sticks to it and goes along with the object with the same speed. The layer next to it has lower speed, the next still lesser and so on, whereas the part at a considerable distance from the object remains at rest. As a result of this relative rotation, a backward dragging force is set up, which repels the motion of the object. This backward dragging tension, known as the viscous force. As the object falls, its speed goes on enhancing and likewise the viscous force on the object becomes similar to the weight of the object. Then, the object goes with a constant speed, known as terminal speed. Stokes found that when the object attains terminal speed, the viscous force on the object is shown by,
Here n, r and v respectively represents the coefficient of viscosity of the fluid, radius of the spherical object and the terminal velocity attained by the object. The relation (i) is known as Stokes' law.
how does a magnifying glass work to produce a large or smaller image?
Ans) In the first one..... F=ma...the only force which acts is F...which causes an acc. of ''a'' to the body of mass m... and as the force=>F=ma but on the second... let .
faraday law of induction(differential and integral form)
Is the fiber end important? So far as the actual light output the fiber termination has little affects on the overall light output. However, it is very important; while at the
Radiation Hazards: 1. They can injure our body cells. 2. Excessive radiation might be cause cancer. 3. Energetic radiation penetrates inside the body and can cause other
what is neutrino
a projectile is fired from a gun has an initial velocity of 90.0 Km/h at an angle of 60.0 degrees to the horizontal. When the projectile is at top of its trajectory an internal exp
People believe that seatbelts are a MUST. But they think that they could increase the risk of other road users. Explain why it would be difficult to gather evidence for this idea..
Chlorine atom differs from chloride ion in the number of: (1) Proton (2) Neutron (3) Electrons (4) Protons and electrons Ans: Electrons
whta is three application of electrostyatics
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