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One type of commercial smoke detector contains a minute amount of radioactive americium-241 (241Am), which decays by -particle production. The particles ionize molecules in the air, allowing it to conduct an electric current. When smoke particles enter, the conductivity of the air is changed and the alarm buzzes.
a. Write the equation for the decay of 241 95Am by -particle production.
b. The complete decay of 241Am involves successively , , , , , , , , , , , and production. What is the final stable nucleus produced in this decay series?
c. Identify the 11 intermediate nuclides.
Compare the energy of the incident light with the rest energy of the earth using Einstein's mass-energy equivalence equation E = mc2, where the mass of the earth is 6 x1024 kg.
For the numerical values I = 10 A,N = 500 turns, g = 5 mm, a = 20 mm, b = 2 mm, and l = 40 mm, find the magnitude of the force. Assume infinite permeability of the core and neglect leakage.
Calculate the oxygenated and deoxygenated hemoglobin levels given these parameters. Is this reasonable from a physiologic point of view? Explain.
Express the maximum radius (Rmax) and maximum thickness (Tmax) in terms of bulk oxygen concentration, Cb (mol/mL), diffusivity of oxygen through the device D (cm2/s) and maximum oxygen consumption rate, Vmax (mol/mL/s).
If the motor is operating on load with a power angle of -20°, and the excitation is adjusted so that the excitation voltage is equal in magnitude to the terminal voltage, determine the armature current and the power factor of the motor.
Develop project plans for the design and construction of the following processes. Use Figure 1.2 as a guide to the activities that must occur. Estimate the overall time required from launching the project to the start of operation.
For total yearly payments of $5000 for 10 years, compare the compound amount accumulated at the end of 10 years if the payments are (a) end-of-year, (b) weekly, and Cc) continuous. The effective (annual) interest is 20 percent and payments are uni..
Radioactive copper-64 decays with a half-life of 12.8 days. a. What is the value of k in s^-1? b. A sample contains 28.0 mg 64Cu. How many decay events will be produced in the first second?
question 1nbspheat capacities cv and cp are defined as temperature derivatives respectively of u and h. show that the
estimate the relative permeability µr at a flux density of 1 T for M-19and AISI 1020 materials.
The fuzzy sets in Example Problem 10.26 have been calibrated so that a person with a resting heart rate of 95 beats per minute has a 75% degree of membership in the normal category and a 25% degree of membership in the tachycardia category. A rest..
Write a function called int_col that has one input argument, a positive integer n that is greater than 1,and one output argument v that is a column vector of length n containing all the positive integers smaller than or equal to n, arranged in suc..
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