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Here is the question which I am confused on, please help me!
Question: What is the wavelength of the emitted photon, when the electron in the hydrogen atom makes a transition from the ni = 4 state to the nf = 3 state?
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You hike 2/3 of the way to the top of the hill at a speed of 3.5 miles per H and run the final third at a speed of 5.6 miles per H
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An isotope of the element Thallium, Tl-206, undergoes beta decay with a half life of 3.1 minutes. Assume you begin with 1.0 grams of the thallium isotope, what mass of the isotope will be left after 9.3 minutes have elapsed?
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