Recent content by UglyNakedGuy

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    Undergrad About the 2nd law of thermodynamics

    this is going to be a newbie question... i couldn't understand why a system in thermodynamic equilibrium must with maximum entropy? and this is just 100% sure that within an isolated system entropy never decreases? thank you in advance for your reply...
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    Graduate How observation of a distant galaxy changes when travelling towards it

    I want to say thank you first, before i got any further questions...I need some time to digest these :)
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    High School Equations for relative velocity

    thank you for your reply! unfortunately, when I search on website, I was told the equation as: \frac{u- v}{1- \frac{uv}{c^2}} and it says if they go opposite directions, I need to replace the sign...if you think I am paranoid :) , please check here...
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    High School Equations for relative velocity

    hello everyone, Can someone kindly show me the equation for relative velocity calculations? when i search for them via wikipedia, there is only one formula for collinear objects and they move to the same direction... so what if they move opposite to each? and what if their motions...
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    Graduate How observation of a distant galaxy changes when travelling towards it

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    Graduate How observation of a distant galaxy changes when travelling towards it

    hi all, quite a discuss, may I ask a question here...about time dilatation. I am just thinking, we all know (approximately) how long one second is, according to our day to day life, and ( please correct me if I am wrong, sorry :) ) if something moves at v=c, for itself, time won't move at...
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    Graduate How to understand why massless particles must travel at c?

    I wish I could start my university again with a different course... thank you :D i got it
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    Graduate How to understand why massless particles must travel at c?

    sorry to be an idiot here, how did u put v into the second equation...i mean algebraically
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    High School Mass and velocity, thank you for your help

    I see, so that's actually a algebra thing? (for my own understanding , sorry if I am wrong) the energy of an object and its V have a positive correlation, so E goes up when speed goes up. and then, since E=mc^2, and c is constant ( assume in vaccum) so we relate E with c . is this...
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    High School Mass and velocity, thank you for your help

    so may I know the equation for p under SR? thank you for your reply :)
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    High School Mass and velocity, thank you for your help

    Dear all, I am a lover in astrophyics, however, I have not got much knowledge in it. Recently, I read a book and it says " the mass (of an object) increases as its velocity goes up", I don't think my brain works for this sentence... I seem to remember that P=M*V, so literally, if velocity...