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A freshly prepared sample of a certain radioactive isotope has an activity of 10 mCi. After 4 h, the activity is 8 mCi.
(a) Find the decay constant and half-life of the isotope.
(b) How many atoms of the isotope were contained in the freshly prepared sample?
(c) What is the sample's activity 30 h after it is prepared?
Implement a traffic light controller FSM with a state encoding where GNS=00, YNS = 01, GEW = 10, and YEW = 11. Show Karnaugh maps for the next state variables and output variables and a gate level schematic for the FSM.
The circuit is to be tuned to the first station at a frequency of 1000 kHz. In order to minimize the interaction between signals, the tuning circuit response must attenuate the signal of the second station (with a frequency of 1020 kHz) by four ti..
what drum speed in r/min is necessary to make the amount of filtrate delivered in 24 h from the rotary filter exactly equal to the maximum amount of filtrate obtainable per 24 h from the plate-and-frame filter?
She wishes to calculate a project's PW with estimated costs of $35,000 now and $7000 per year for 5 years beginning 1 year from now with increases of 10 % per year thereafter for the next 8 years. Use a real interest rate of 12% per year to make t..
Obtain the Thévenin and Norton equivalent circuits for the portion of the circuit to the left of terminals a-b in Figure P2.1.4, and find the current in the 200-Ω resistance.
Write an equation for the combustion of PVC in oxygen. Suggest a reason why its incineration poses a serious risk during a fire.
Adipic acid is used in the manufacture of nylon 6,6. It is made by hydrogenation of phenol to a mixture of cyclohexane and cyclohexane (known as KA oil-ketone and alcohol), followed by oxidation with nitric acid.
What is the rationale for claiming that the presence of a low temperature loss peak is a necessary and sufficient condition for good room-temperature impact strength
Solid NH4NO3 (ammonium nitrate) decomposes on heating to 400°C, forming N2O gas and water vapor, H2O. (a)Write a balanced chemical equation
Determine the output voltage. Then indicate how the circuit may be modified to perform as a summer.
An 8-bit A/D converter is driven by a 1-MHz clock. Estimate the maximum conversion time if:
The most unsuitable reactor for carrying out reactions in which high reactant concentration favours high yields is 1. plug flow reactor 2. PFR in series
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