Recent content by dennisrobert

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    Relative Humidity and feeling of comfort

    Hi, The more humid it is, the more irritable the climate will be. The sweat will not evaporate easily if the relative humidity is high. I have been to two cities in two different countries recently - Madison in USA and Kolkata in India. The humidity in Kolkata is about 65% and that in Madison...
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    Forced Oscillations: +ve Sign of Fcoswt

    In the equation of forced oscillations (given below), ma = -kx + FCoswt, why is that the 2nd term on the right hand side is given the +ve sign. I know that kx should be negative since 'ma' and 'x' are in opposite directions. I can't quite seem to get the gist of Fcoswt being given a +ve...
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    Interference of fibre optic signals with mobile phones' microwaves?

    I got an SMS educating people how to find out the presence of a hidden cam in a trial room of a textile showroom or bathroom. It goes like this :- "If you can't make a call in the room,the there is a hidden cam. This is due to the interference of the fibre optic with the signal transfer."...
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    Michelson–Morley experiment: Did it disprove the existence of ether?

    MM experiment proves that the speed of light is constant in a specific medium and there is no relativity for it and this was the main principle which lead to Einstein's special theory of relativity. Before the MM experiment, speed of light was thought to be relative to the observer's motion. I...
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