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A windmill is operating in a 10 m/s wind that has a density of 1.2 kg/m 3 . The diameter of the windmill is 4 m. The constant-pressure (atmospheric) stream tube has a diameter of 3
Light described at a place by the equation E=100[sin(5*10^15)t + sin(8*10^15)t] falls on the metal surface having work function 2eV.calculate the maximum kinetic energy of photoel
A force of 2.5kN is needed to lift a load. How much work is done if the load is lifted by 500cm? An electromagnet exerts a force of 12N and moves a soft iron armature by a dist
The average distance of an electron in an atom from its nucleus is of the order of: (1) 10 6 m (2) 10 -6 m (3) 10 -10 m (4)10 -15 m Ans: (3) 10 -10 m
With the help of neat & labelled diagram. Explain the principle & working of a moving coil galvanometer. What is importance of radial magnetic field.
Q. A screen is placed 90 cm from an object. The image of the object on the screen is formed by a convex lens at two different locations separated by 20cm. Determine the focal lengt
How are fiber optic made? The actual process varies significantly from one manufacturer to other. In essence, a huge cylinder of core is made off high purity material, an eleme
Explain vectors Vectors : a quantity that has a size as well as direction is known a vector. So, for example, the wind blows with some speed and in some direction. So the win
Resolution of Forces: This topic is important, but is really the opposite to Addition of forces. Recalling that two forces can be added to give a single force known
Q. Why do you not collapse in the pressure created by the atmosphere? Answer:- If the outward pressure inside your body weren't equal to the pressure pressing in on you an
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