Recent content by physicsprasanna

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    Unit Conversion Troubleshooting: Identifying and Correcting Common Errors

    That's just one day, not a fortnight. And why twice 201.2m/1 furlong?
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    Intro Chemistry: Does this look ok?

    Great going ... Everything seems right to me
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    Powering Homes with 10,000,000 Volts

    https://www.physicsforums.com/showthread.php?t=94379 Please see the above thread
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    What Are Shock Cones and How Do They Relate to Mach Numbers?

    Mach (X) means that the velocity of that particle is X times the speed of sound. So mach II would be twice the speed of sound.
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    Bulb Temperature using resistance

    0.008 degC^-1 is alpha ... its not 1/alpha ... that's what is wrong... 1/alpha will have the unit deg celsius. only then you can add it with T0 .. What you have taken as alpha is actually 1/0.008 degC^-1 ... so your 1/alpha will have the units degC^-1 so you cannot add it to T_{0} In a...
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    Solve Hard of Hearing Question: Increase dB for Hearing Aid?

    Please read the replies that you've got for your previous post. https://www.physicsforums.com/showthread.php?t=113220 And try this question out ... I think all the information necessary for solving this question has been provided there ...
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    Understanding Sound Levels & Protectors

    The decibel is a logarithmic scale. The decibel level can be calculated by \beta=10\log_{10}{\frac{I}{I_{0}}} where I_{0} is a constant reference intensity = 10^{-12}W/m^{2} This is roughly the intensity of a just audible sound. Your problem can be solved only if the intensity of the chain...
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    Electricity and Magnetism question

    The field is indeed given by B=\frac{\mu_{0}NI}{L} and the total flux through the solenoid \phi=NAB is also right. Maybe what they asked for is the flux through a single turn which would be your answer divided by N Also keep in mind that B=\frac{\mu_{0}NI}{L} is valid only for a long...
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    Equations & Angular Velocity for Rotational Forces

    you could try these: http://hyperphysics.phy-astr.gsu.edu/hbase/circ.html#circ http://theory.uwinnipeg.ca/mod_tech/node43.html
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    How Do You Calculate a Particle's Average Velocity?

    For Average velocity Find the final displacement of the particle from the initial position. Then divide this by the total time taken. For average speed Find the total distance traveled by the particle. Divide this by the total time taken.
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    Energy Loss in SHM: Piano Wire (262Hz) - Help Needed!

    i'm not sure of this ... but i think we can do this problem like radioactivity problems... for the first part given that half-life = 4s. Now calculate deacy constant which is ln2/(half-life period)... The decay constant is defined as inverse of time taken to decay to 1/e times the original...
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    Magnetic field questionwhat did i do wrong

    why do you say the answer is wrong?
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    Current & Voltage Relationship in LCR Series Circuit

    the question is : suppose the resonance frequency of the LCR series circuit is f[SIZE="1"]r. Will the current in the circuit lag behind the voltage or lead the voltage in the following cases : (i) when the applied AC frequency f > f[SIZE="1"]r (ii) when f < f[SIZE="1"]r we can say that the...
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    Gauss' Law: Discrete vs Continuous Charges

    thanks for the replies ... maybe it is due to the fact that the field due to a charge does not exist at the place of the charge. Thanks once again!
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