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Problem 1:
a) Calculate the intrinsic carrier concentration, n, at T = 200 and 400K for silicon and GaAs
b) If silicon is doped with a donor concentration of N_d = 10^16 cm^-3 , what is the position of the Fermi level at room temperature (assume all the donor atoms are ionized)
c) If the electron concentration of silicon (at room temperature) is n_0 = 3 x 10^4 cm^-3 , what is the hole concentration, p_0?
d) Is the material n- or p-type?
natural uranium consists almost entirely of 238u. to operate a nuclear power reactor the fuel must be enriched in a
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What is the pH at the equivalence point of the titration and at the half equivalence point
Consider a single photon with a wavelength of a frequency of and an energy of E. What is the wavelength, frequency, and energy of a pulse of light containing 100 of these photons
waters relatively high specific heat 4.184 jgdegc makes it an ideal coolant for automobile engines. how much heat from
an unknown mass of each of the given substances as with the final temperature is recorded as indicated 1.pyrex glass
Petroleum is a fossil fuel containing many different carbon compounds. If the carbon atoms in petroleum have been in the ground for 325 million years
Explain the half-life of 18-F is 16 minutes. It takes 132 minutes to label deoxyglucose to make the PET scanning reagent Fludeoxyglucose. Explain how many curies of radioactivity remain in the product
If you wanted to prepare a solution of CO in water at 25C in which the CO concentration was 1.8 mM, what pressure of CO would you need to use
Rainwater from Menlo Park, California is said to contain 0.3 mg/L of silica (SiO_2). What is the concentration of the silica in the rainwater in terms of: ppt (parts per trillion), ppb, molarity (M), and % solution?
A 3.5514 g of a chromium oxide was found to contain 2.4299 g of chromium and 1.1215 g oxygen. What is the empirical formula for this chromium oxide
when 7.20 grams of h2so4 l at 22.0oc are poured into a 94.0 gram mixture of ice and watercontaining 6.15 grams of ice a
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