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A boat can travel at a speed of 3 m s-1 on still water. A boatman needs to cross a river whilst covering the shortest possible distance. In what direction should he row with respect to the bank if the speed of the water is
(i) 2 m s-1,
(ii) 4 m s-1
Suppose that the speed of the water is the similar everywhere.
Does solar radiation contain a complete spectrum of all forms of electromagnetic radiation? Yes it does. It have all the forms of radiation, but 99% of its energy is carried
Conventional Current: Earlier scientists had no knowledge of the concept of electron, so the developed the convention, still in use, , that the direction of current is for appo
what is neutrino
how to transform series to parallel
Q Define: Drift velocity. Drift velocity is described as the velocity with which free electrons get drifted towards the positive terminal, when an electric field is applied.
obtain expression for potential at point due to uniformly chargeddisc
A single fixed pulley Set up a one fixed pulley as shown in the diagram below. By means of weights see how much force is needed to lift weights of 25, 50, 75, 100 and 200 g. Ca
An x-ray photon collides with a free electron, and the photon is scattered. During this collision there is conservation of: a) momentum but not energy b) neither moment
how to solve it
1. A very narrow laser beam is shone into a sphere of solid glass that has uniform refractive index n>1 and radius ρ . The beam makes an angle α in air with the normal to the surf
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