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  1. n.karthick

    Step up transformers - confusion

    It is not like that. Power loss in a cable is given by Ploss =I^2 R The voltage drop V in the cable depends on current I passing through the cable. This V is not the applied voltage Vs. Instead Vs= V+Vl where Vl is the load voltage (because resistance of cable is in series with load) So your...
  2. n.karthick

    How Is Energy Stored?

    Energy can be stored in batteries or else it has to be consumed as and when it is generated.
  3. n.karthick

    Is there really such a thing as a perfect circle in nature?

    well, my navel looks to be a perfect circle when my body is not stretched.:wink:
  4. n.karthick

    Would the other end move instantaenously

    Ok what is the speed? 330 metres/sec or even more?
  5. n.karthick

    Would the other end move instantaenously

    Ok, I know sound requires medium to travel but I am curious to know how the compression wave in metal bar travels at speed of sound, that too in vacuum. I mean why it travels at such low speed. Why cant it travel faster than that? What is the theory/ mathematical derivation which shows that it...
  6. n.karthick

    Would the other end move instantaenously

    Sorry I dont know anything about this. Could you please explain why it travels at the speed of sound? I could recall that speed of sound is due and depends on the properties of the medium at which it is travelling. Here, coming to our iron rod example, though it is not rigid and it is like a...
  7. n.karthick

    Would the other end move instantaenously

    Oh my doubt is why it takes months for other end to move? Since iron bar is rigid object it should move instantaneously right?
  8. n.karthick

    What is the incompressible fluid?

    In reality all fluids are compressible at least to a very small extent.
  9. n.karthick

    Why do forces make an object move?

    Forces do really exist in nature and they are measurable. As we all know its SI unit is Newton. I would like to say, when an object is disturbed by a force and with no resistance in the path, it will move (accelerate) in order to show its opposition to the source which is creating force. The...
  10. n.karthick

    Why do forces make an object move?

    Forces can make an object to accelerate only if the resultant force (vector sum of all forces) is non-zero. If you ask why, it is the effect in order to neutralize the cause. For example, if there is a potential difference between two points, electric current flows from high potential to lower...
  11. n.karthick

    Mass to energy conversion in living beings

    I have a doubt regarding mass to energy conversion. Suppose I consume m1 kg of food at beginning of a day. Will it be equal to the mass of solid and liquid wastes out of my body on that day (say m2) and increase in mass of my body (say m3) and added to energy gained by me from that food (Eg)...
  12. n.karthick

    Energy required per day for survival by an individual

    I want to know how much energy is required by an average individual per day for his survival, assuming he is doing normal work. is there any rough estimate? (say some thousands of joules !!!!). I like to know this rough value and I want to convert this is to electrical equivalent (i.e, in kWhr)...