Recent content by tuananh3ap

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    How to Solve Second Order Differential Equations Involving Sines and Cosines?

    i know this thing. But i don't know the way to slove this equation who can help me. thank you very much
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    How to Solve Second Order Differential Equations Involving Sines and Cosines?

    hello every body .I have some problem : i don't know slove the equation x"=k/m*x (1) i don't understand result of (1) is x=Asinkt+Bcoskt
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    High School Can Anyone Clarify These Physics Formulas?

    you are true but i think Newton's lawF=ma and F=Gm_1m_2/R^2 => that formula formula F=Kq^2/R^2 was proofed by Coulomb by assay
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    Using Acetone as Working Fluid in Rankine Cycle: Efficiency & Boiling Point

    i think: have many reason the acetone doesn't use like a power example: expensive, steam fast, don't produce many etc but i know have many engine working by alcohol
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    Graduate How Does Mass Increase Affect Proton Velocity in a Cyclotron?

    sorry .the vietnamese usually call it is xiclotron.i forgot i am joining forums of international we know A cyclotron is a type of particle accelerator. Cyclotrons accelerate charged particles using a high-frequency, alternating voltage (potential difference) when electron is inside dees D...
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    Graduate How Does Mass Increase Affect Proton Velocity in a Cyclotron?

    hello everybody i thinks the velocity of proton in xiclotron will not increase because the mass proton will increase (theory of relativity) but i think beside have one cause: when proton flys between the two box D then the velocity will be increased by electric fields but time fly between 2...
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    What is the Effect Bifinda - Brauna and how can it help me?

    hello what do you tell about I want to know this effect the experiment is a news of magazine russia I don't know the name of magazine because I don't know russian.But I know if translate from vietnamese into english , the name means "young techniques person"
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    What is the Effect Bifinda - Brauna and how can it help me?

    three frame silver paper fly in the asmosphere in the room no wind they are connected with 1 electric wire 20000 V in room smell the ozone this is a experiment it was practiced by the student russian
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    Undergrad Magnetic flux formula confusion

    formula \phi = BAcos\alpha is magnetic flux it like \phi=\ointEdA formula F=ILBsin\alpha was deduced from F=q[B]v[B]B or F=qvbsin\alpha
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    What is the Effect Bifinda - Brauna and how can it help me?

    hello everybody I have even heard about the effect Bifinda - Brauna I don't understand it who know this effect can help me to answer about it what is it thanks
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    Electric Circuit: i=i_{o}(1-e^{-t/\tau}) - Is (1) or (2) True?

    thank you very much
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    High School Lightning in Sky: Why Don't I Hear Anything?

    thank you vert much
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    High School Lightning in Sky: Why Don't I Hear Anything?

    sorry rewrite "I sure I saw lightning in the sky. it is very legible. I think it is not far and I do not think the thunder can vanish"
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    High School Lightning in Sky: Why Don't I Hear Anything?

    I see obviously voltaic fire hurl in the sky this is a argillous jet
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    Electric Circuit: i=i_{o}(1-e^{-t/\tau}) - Is (1) or (2) True?

    thanks i think your answer like my answer but what is the end