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  • What is the significance of sqrt{2gh} - Physics Forums
    (have a square-root: √ ) It's because v 2 is KE per mass Whenever KE + PE =constant, you'll have equations involving v 2 = PE m, which in some cases is gh As to Bernouli's equation, that's just conservation of energy applied to a fluid, and both KE and PE appear in it
  • Square Root of 4: Can it be +2 or -2? - Physics Forums
    The square root of 4 can be +2 or -2, your math teacher is retarded What you did with the imaginary number results in what I believe is called an extraneous solution (correct me if I'm wrong) If you substitute the 1 back into your original problem i^2=-1, you will find that 1=-1, which is not a true statement, meaning the solution is incorrect
  • How did the Greeks deal with sqrt(2)? - Physics Forums
    So ##\left(\dfrac a b \right)^2 = 2##; hence ##a^2 = 2b^2##; hence ##a^2## is even; hence, being a square, ##a^2## is a multiple of ##4##; hence ##2b^2## is a multiple of ##4##; hence ##b^2## is a multiple of ##2##; hence ##b## is even But this contradicts the fact that mentioned earlier, that at least one of them is odd
  • Square Root Graph: Understanding x- y- Intercepts - Physics Forums
    Remember, every real number has a positive and a negative square root Don't feel too bad about that mistake, most graphing application programmers seem to forget as well So, basically, it should look a bit like y=x^2 tipped on its side
  • Log base 2 is the same thing as square root? - Physics Forums
    Hi, Is is correct to say that the logarithm of base 2 of a number x, is the same thing as the square root of a number x? Insights Blog -- Browse All Articles -- Physics Articles Physics Tutorials Physics Guides Physics FAQ Math Articles Math Tutorials Math Guides Math FAQ Education Articles Education Guides Bio Chem Articles Technology Guides
  • Reason for dividing peak value by sq. root 2 to get RMS - Physics Forums
    The conclusion will naturally be the same It sounds to me like the OP wants to know why and is not simply satisfied with the sqrt(2) formula -You can also sample the sine wave (or any waveform) at a number of points, square each sample, average them, and then take the square root of the average and you will find the same thing
  • Square Root of Pi: Is it Possible? - Physics Forums
    what is the "square root of pi", is still a vague question that needs elucidation how on Earth would you "arrive" at root two? as root two squares to 2, surely if one can 'arrive' at root two, one can 'arrive' at root of root two since that is then the fourth root of 2, and if one can 'arrive' at square roots why not fourth roots
  • What is the square root of (-12)^2? - Socratic
    In this case, since the principal square root or a positive number is the non-negative square root, the answer is #12# Note that for non-negative real #n#, the symbol #sqrtn# always refers to the principal square root The definition of a square root is: #a# is a square root of #b# if and only if #a^2 = b# So every positive number has 2
  • Proove that the cubic root of 2 + the square root of 2 is irrational
    Which is a contradiction since sqrt(2)(-3a^2 -2) is an irrational multiplied by a non-zero rational, which can be proved to always be irrational, and the sum of a rational (a^3 + 6a) and an irrational can be proved to always be irrational, and above cannot equal 2 since 2 is rational





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