Recent content by alfredbester

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    Find two lines through the point (2,8) and tangent to y = x^3

    y - 8 = m(x-2) y = (3x^2)(x-2) + 8 x^3 = (3x^2)(x-2) + 8 2x^3 - 6x^2 + 8 = 0 Solve for x and then use this to find equation of the two lines.
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    Finding Points of Inflection on a Curve

    Perfect :).
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    How Do You Calculate Distances and Angles for Multiple Treasure Map Routes?

    Your overcomplicating things, I assume the treasure is located at each point turning point. The first treasure point (third on your list) is the easiest it's located at 12m and 0°, when it says turn 90° your are turning on a right angle to your right.
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    Is cross section is proportional

    Thanks, I've got it now m=0 because the exchange boson is a photon :).
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    Is cross section is proportional

    That cause a problem then I was the scattering cross section is proportional to Mfi and |M_{fi}|^2 /propto 1 / (q^2 + m^2)^2 Starting from the definition of q = p_{final} - p_{initial}. Show that the angular dependence of the scattering is then given simply by the Rutherford formula:CS=...
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    Is cross section is proportional

    1 / (4psin^2(x) + m)(4psin^2(x) + m) Not sure what to do from there.
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    Is cross section is proportional

    If I show something that a cross section is proportional to: 1 / (16p^2 sin^4( x) + 8mpsin^2 (x) + m^2) does it imply that the cross section is proportional to 1 / sin^4 (x) as well?
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    Relativity - proton-proton collision

    Thanks. I have a similar question, for electron-proton collision and I'll try to post my full working as I'm not really sure on these problems at all. Could someone check my answer please. An electron with with total energy E collides with a proton at rest e + p -> e + p + X, find the...
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    Understanding the 1 s Digit Rule in Unit Conversions | Helpful Tips and Examples

    she means significant figures I guess so your answer should be 400 x 10^7 Hz.
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    Relativity - proton-proton collision

    A Proton, m_{1} with Kinetic energy T = 200MeV strikes a stationary proton in the lab frame. p + p -> p + p + X what is the maximum mass of X, which can be produced. I think I need to make use of E^2 - P^2 c^2 is invariant. and In S: E = (m_{1} + m_{0})c^2 , p = p_{1} In S ' ...
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    2000 mT Setting - What Does It Mean?

    Thanks :).
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    2000 mT Setting - What Does It Mean?

    2000 millitesla setting, it readsi 100 does this mean the field is 0.2T or 0.1T? I was pretty sure it was 0.2T but a demonstrator said the field had a maximum of ~1T but I'm getting a max of 2T.
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    Normalising simplified proton distribution

    So \rho (r) = (4pi r^2 dr).(1/r)Exp(-r / R) Integral from infinity to 0 of | \rho (r)|^2 = N^2 . [(1/r^2).Exp(-2r / R)] is 1 = N^2. (4pi) [1 / (-2/R)] = N^2 .2piR => N = 1 / sqrt(2.pi.R)
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    Normalising simplified proton distribution

    I tried asking this question in the maths help, but am still stuck. Q. For a simplified model of a proton's charge distribution, (where R can be considered as some characteristic "size" of the proton): \rho (r) \propto (1/r)Exp(- r / R) where R is some characteristic size of the proton...
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    Integral P(r) Normalization: Find Constant

    Thanks, I can't see how to normalise this function however.