In the data for A dependence of R (Table 2b), by what factor (multiplier) did the diameter D increase from the thinnest to the thickest wire? Show the ratio calculation in support of your answer. By what factor did the area A increase? Show calculation. Are these factors consistent with how area A and the diameter D are related? If D doubles, by what factor would you expect the cross-sectional area to increase? D diameter (cm) 0.0175 0.0255 0.0315 0.0415 A area (cm^2) 2.41x10^-4 5.11x10^-4 7.79x10^-4 13.5x10^-4 V(volt) 0.945 0.898 0.850 0.777 I (Amp) 0.0214 0.0410 0.0600 0.0903 R Resistance  (Ω) 44.2 21.9 14.2 8.60

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Half Life

The concept of Half Life has numerous practical applications some of them includes figuring out the effective drug dosage to finding out when a radioactive becomes safe to use. If you look for a career in Nuclear Physics you will need this concept.