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Strontium-90 and radon-222 both pose serious health risks. 90Sr decays by -particle production and has a relatively long half-life (28.8 yr). Radon-222 decays by alpha-particle production and has a relatively short half-life (3.82 days). Explain why each decay process poses health risks, and a few preventative measures one could take.
The scale factors used are 1 cm = 0.03 T and 1 cm = 200 At/m. Find the hysteresis loss in watts.
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.
Test the knowledge and understanding of the concepts and procedures for process instrumentation and communication systems used in process industries.
Determine the minimum required numerical value of the dimension b of the posts in term of mm and
Additional data: Assume for simplicity that the ideal-gas heat capacities are constant: n-hexane = 176 J/mol K; n-octane = 247 J/mol K.
Based on this brief description of the Head Master, draw a block diagram of how this device might work and the basic components that might be needed in the Head Master. Include in your block diagram the ultrasonic signal source, detectors, timers,..
Calculate the average mechanical torque needed to turn the coil and generate power for the resistor. Identify the action of the device as that of a motor or a generator.
If a patient with thyroid disease consumes a sample of Na131I containing 10 of 131I, how long will it take for the amount of 131I to decrease to of the original amount?
Compute the eddy-current loss in this core when the frequency is 750 Hz and the maximum flux density is 0.8 T.
In order to make it into a common base amplifier, terminals a and b are connected together, and capacitor CE is disconnected from ground and used to couple a signal from a source to the emitter. Determine Ri, Rin, Av1, and Ai.
Ac measurements with constant voltage amplitude reveal that the total core loss of a certain magnetic circuit is 10 W at f = 50 Hz, and 13 W at f = 60 Hz. Find the total core loss if the frequency is increased to 400 Hz.
is to be separated in a reversible continuous flow isothermal, isobaric separator into pure acetone and an aeotrope that forms at 39.250C under atmospheric pressure. The azeotrope contains 61mole % CS2.
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