- Physics extended essay ideas?

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How can we say that 1/4 wavelength dipole has impedance of 36.5, without knowing the size or material of the antenna, i can't understand? What would happen if a mutation occurred that resulted in DNA polymerase I being incapable of bonding to uracil? I was told to solve this: (2x^2 + 3)^2 = 4x(x^3 + 6)? Exactly how many 20oz bottles goes in a 2 L? I need help with this problem. I have to get differential equations so that I can make a model to later simulate in Matlab/Simulink?