Recent content by androidx219

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    Spring & Blocks: Max Friction Force & Oscillation

    I am sorry, I was grossly wrong at the statement I made there. Thanks for pointing that out and correcting me. f(max) can never be equal to kx and will always be less than kx, otherwise the blocks wouldn't move at all as you rightly said. Lets consider the FBDs of A and B separately, suppose...
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    Spring & Blocks: Max Friction Force & Oscillation

    if kx exceeds μmg, there will be slipping and relative motion between the blocks. The frictional force at max displacement has to be less than μmg, only then the blocks will oscillate together without slipping. Reason: The frictional force is STATIC and not DYNAMIC. Static friction adjusts...
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    Calculating Water Pump Efficiency and Work Rate

    OK, 50 cm^2 = 0.005 m^2 and not 0.05 m^2 . Got your point. The answer is 8 m/s.
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    Calculating Water Pump Efficiency and Work Rate

    ok, that's my usual silly mistakes. i don't know why i squared 50 and made it 0.25. Obviously you are correct. Thanks
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    Calculating Water Pump Efficiency and Work Rate

    (a) volume flow rate = (2.4/60) SI units should be equal to (AREA*speed) = (50 cm^2)*speed = (0.25*speed) SI units therefore speed = {2.4/(60*0.25} m/s by LAW OF CONSERVATION OF VOLUME (MASS, assuming incompressible liquid) (b) Now for calculating power, take density of water as 1000 Kg/m^3...
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    Trouble understanding ray optics

    The question is NOT stupid at all. What's taught in schools can create such confusions. The distance is very large, but so is the diameter of sun. Therefore, the rays are NOT strictly parallel. Rays coming from two diametrically opposite ends DO make an angle on our eyes. Thus you resolve the...
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    Electrical appliance which is labelled 240V, 2000W

    Considering the electrical appliance as a simple form of resistive load, such a slightly high voltage than rated capacity should not burn it but if the voltage applied is very high, then definitely it will burn the appliance, (unless protected by some other sophisticated mechanism). Similarly...
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    What Causes High Heat Loss in Space?

    I don't think that anybody would suddenly freeze if exposed to vacuum and you are right that vacuum is the best insulator. The only method of heat transfer from the body to outer space is radiation in this case as there are no atoms for conduction or convection. The heat transfer in the form of...
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    Acceleration and velocity (conceptual) question

    Ideally if the car is strictly driving straight to the x-axis and the brakes are applied on both the wheels with identical force, then the car shouldn't rotate at all (assuming the slippery road has no geometrical flaws). In reality this situation might be hard to achieve. So any unbalanced...
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