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(i) It is also known as impure semiconductor. (ii) The phenomena of adding impurity is known as Doping.
Places where friction occurs Locate the places on several mechanical devices where parts rub together. Roller skates, pulleys and the wheels of toys often required oil. Try to
Explain Conservation of Angular Momentum When a body rotates (spins like a top) or revolves (moves in a circle around a central point), all of the rules that we have used to ca
NEWTON ? "The force which forms an acceleration of 1 ms-2 in a mass of 1 kg". It is represented by N.
How are appliances we use in the domestic circuit interlinked? What are the benefits of this connection?
What do you understand by "Absorption coefficient"? which is a better absorber of sound, glass or fibre glass?
What two properties of electromagnetic waves are used to attach info to radio signals? a) By varying the amplitude of a radio wave, you can determine information. That is how A
Demonstrating the cause of difference in length of day and night in some places:- Use the similar apparatus as in 6 above. Mark a circle on the ball around its centre to show t
difference between pure and impure spectrum
Properties of cement mortar 1. It should make good adhesion with building units like bricks, stones etc. 2. It should be capable of resisting penetration of water. 3. It s
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