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solid angle is the ratio of the intercepted area dA of the spherical surface , described about the apex O as the centre ,to square of its radius r

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Definition for elastic vibration?

The definition of elastic vibration was found in the website at the bottom. Elastic vibration is oscillating movement of a solid object in which a large majority of the energy is retained though elastic forces and with inertia of the object.www.answers.com/topic/elastic-vibration


What is the proper angle of sewage drainage pipe?

Horizontal lines 3" in diameter or larger should be as close to 1" in 10 feet ( pitch) as possible so that the flow of the liquid component carries the more solid particles along with it instead of having the fluid drain away quickly leaving the solid (feces) to dry out and clog the pipe . Smaller lines can be the same or larger pitch because there usually is no solid material in them.


What is the transmission angle?

Angle between coupler link and output link for a given crank angle is called transmission angle, it is maximum when crank angle is 180 degree and minimum when crank angle is 0 degree


What is difference between electrical angle and mechanical angle?

Electrical angle is half of mechanical angle in unipolar electrical machines. In multipolar electrical machines, the relationship between the mechanical angle and electrical angle is Electrical angle = (P/2) x Mechanical angle where: P = Number of poles.


What is the definition of reactive power?

For Single Phase, P = VI cos (theta) therefore cos(theta) = P/VI here P = Power V = voltage I = current theta = phase angle current to voltage cos(theta) = power factor For Three Phase, P = 3VI cos(theta) where V = phase voltage and I = phase current and theta = phase angle