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Must all illuminator have forced ventilation?
Usually yes, the exception being which with a massive construction that dissipate heat by transfer or radiation.
A pulley in the form of a uniform disk with a heavy rope hanging over it. The circumference of the pulley is 1.2m and its mass is2.2kg.The rope is 8.0m long and its mass is 4.8kg.A
Newton's law of universal gravitation (Sir I. Newton): Two bodies attract to each other with equal & opposite forces; the magnitude of this force is proportional to the produ
Rayleigh criterion; resolving power: A criterion for finding out how finely a set of optics might be able to distinguish. It start with the supposition that central ring of on
What is the meaning of Refraction? Waves that do not reflect back from a boundary but travel into the new medium instead are said to refract. In one dimension, the wave just mo
According to their frequencies, waves are separated into three categories: (1) Audible or sound waves : Range 20 Hz to 20 KHz. These are formed by vibrating bodies like as voc
mass of body= 4 kg is dropped form height= 45 m Calculate the kinetic energy just before hitting the ground
Refracting telescopes, if uncorrected, suffer from chromatic aberration. Chromatic aberration occurs because: a) red light is focused more strongly than blue light b)
What is meant by tunnelling phenomenon? A tunnel diode is a high conductivity two-terminal P-N junction doped heavily about 1,000 times higher than a conventional junction diod
Explain the working of a refrigerator A refrigerator is the reverse of a heat engine. Here the working substance extracts heat Q2 from the cold reservoir at temperature T2, som
A constant potential difference is applied across the plates of a parallel-plate capacitor. Neglecting any edge effects, the electric field inside the capacitor is: a) constan
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