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A boat running upstream takes 8 hours 48 minutes to cover a certain distance, while it takes 4 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and speed of the water current respectively? A. 2 : 1 B. 3 : 2 C. 8 : 3 D. Cannot be determined

Asked by Srikanth Bala 06/02/2015 Last Modified 06/02/2015

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angular momentum of the electron is quantised

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The maximum frequency limit of the continuous x-rays spectrum depends upon __________. (the atomic number of the atoms of the target, the kinetic energy of the incident electrons, the maximum frequency limit of the characteristic x-rays spectrum, the degree of vacuum in the x-ray tube)

kinetic energy of electron

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Those material objects which allow charge or electric current to pass through them are called __________. (Insulators, Conductors, Semi-conductors, none of these)

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