Recent content by Sublime74

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    De Broglie wavelength, velocity of electron

    Homework Statement Question 1) Calculate the de Broglie wavelength of a neutron (mn = 1.67493×10-27 kg) moving at one fiftieth of the speed of light (c/50). Question 2) Calculate the velocity of an electron (me = 9.10939×10-31 kg) having a de Broglie wavelength of 225.7 pm...
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    Calculating Age of Old Sample with Carbon 14 Dating

    Homework Statement The amount of 14C in an old, isolated sample of vegetation is 0.692 that expected from a present day sample with an equivalent carbon content. Calculate the age of the old sample in years. Homework Equations Im fairly sure you use the following equation to solve...
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    How Does Radioactive Decay Affect Isotope Ratios Over Time?

    Homework Statement A sample of radioactive isotopes contains two different nuclides, labeled A and B. Initially, the sample composition is 1:1, i.e., the same number of nuclei A as nuclei B. The half-life of A is 2 hours and, that of B, 4 hours. What is the expected ratio A/B after 8 hours...