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1. What arc the fundamental differences between a thermal and a photon (quantum) d etector? 2. Assuming an in terband absorption mechanism, what is the cutoff wavelength for a semiconductor with a bandgap of 0.2 eV? What is it if the bandgap is 0.02cV? 3. Calculate the electron transit time and device gain for a photoconductor under these conditions: distance between contacts=50 µm, applied voltage=lO V, minority carrier lifetime=2 x l0-7 s, J..ln = l 0000cm 2 !Vs ,and J..lP = I OOOcm 2 / Vs .
Wet steam at 1 100 kPa expands at constant enthalpy (as in a throttling process) to 101.325 kPa, where its temperature is 378.15 K (105°C). What is the quality of the steam in its initial state?
List out the different biological process involving acids and bases with relevant equations and in adverse conditions how is the pH level maintained in biological systems?
Now the capacitor is cut in two as shown in Figure 6.47h. Calculate the capacitance of one of the two smaller capacitors thus created. Is the sum of the capacitance of the two halves in Figure 6.47h equal to the capacitance of the whole capacitor ..
Explain why the resting potential does not equal the Nernst potential of any of the ions
If the feed quality is changed to 80 mol% vapour, the change in the slope of the q-line isA homogeneous reaction (R ® P) occurs in a batch reactor. The conversion of the reactant Ris 67% after 10 minutes and 80% after 20 minutes. The rate equation..
Nanotools, like the Atomic Force Microscope, allow us to build atom by atom.
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,
Use the generalized graphs to calculate the entropy change of 1 mole of ethanol undergoing isothermal compression from 1 bar to 100 bar along the critical isotherm.
Now describe how you would prepare 2.00 L of each of the following solutions. a. 0.250 M NaOH from solid NaOH b. 0.250 M NaOH from 1.00 M NaOH stock solution c. 0.100 M K2CrO4 from solid K2CrO4 d. 0.100 M K2CrO4 from 1.75 M K2CrO4 stock solution 3..
Find the efficiency of the transformer when it is delivering 7.5 kVA at 230 V and 0.85 power factor lagging.
Does the current through the battery increase, decrease, or remain the same? Justify your answer.
Construct a reaction which has an induced kinetic differential equation that has solutions defined on the whole positive half-line of real numbers and which still does not belong to any of the reaction classes above.
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