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The output of an FT-IR is an interferogram which is the sum of many cosine waves. Why is this so? Why does this pattern have a "center burst" followed by rapidly decreasing intensity? The cosine waves have audio frequencies. What is the connection between the moving mirror velocity and the frequency of these cosine waves? This data must be truncated. Give two reasons why the data must be truncated? If we use a boxcar function (rectangular pulse) to truncate the data the transform of the data produces spectral lines with feet. What do feet mean? Show that the transform of the product of a rectangular pulse and a cosine wave is the convolution of a sinc function and a frequency shifted delta function at the frequency of the cosine wave, that is, a sinc function at the frequency of the cosine wave. To get rid of the feet we use an apodization function such as a triangle function. Show that the transform of the product of a triangle function and a cosine wave is the convolution of a shifted delta function and a sinc squared function, that is, a sinc squared function at the frequency of the cosine wave.
in the olympics and other major athletic competitions a gc-ms is used to screen athletes for their use of banned
A compound is found to be 30.45% N and 69.55 % O by mass. If 1.63 g of this compound occupy 389 mL at 0.00°C and 775 mm Hg, what is the molecular formula of the compound.
The fluoridation of city water supplies has been practiced in the US for several decades. It is done by continuously adding sodium fluoride to water as it comes from a reservoir.
The chemical nature of an element is independent of A. its atomic number. B. the number of protons or electrons present in it. C. the number of neutrons present in it. D. none of these.
Lead (II) nitrate and ammonium iodide react to form lead (II) iodide and ammonium nitrate according to the reaction. Pb (NO3)2 (aq) + 2NH4i (aq) --> Pbi2 (s) + 2NH4NO3(aq)
what is the appropiate mechanism for the radical polymerization of 1-butyne? show the polymerization of three units of 1-butyne.
Sketch galvanic cells based on the following overall reactions. Show the direction of electron flow, the direction of ion movement through the salt bridge, and identify the cathode and anode
For experiment 4 in chem 208, how do you find the term symbol? For example part 1b how did she find the term symbol for the red line color?
Table salt is comprised of sodium (symbol Na) and chlorine (symbol Cl) in a simple one to one ratio. It is written in chemical shorthand as NaCl. How would you go about finding approximately how much salt there is in our body?
How many grams of calcium hydroxide is produced when 3.2 micrograms of CaC2 reacts with 5.1 micrograms of water?
The membrane has pores equivalent in size to a spherical molecule with a molecular weight (Mm) of 120,000 daltons. The protein solution consists of albumin (40 g/L at Mm = 69,000 daltons), globulins (70 g/L at MW = 150,000 daltons), and fibrinogen..
67.0 mL of a 1.80 M solution is diluted to a voume of 218 mL. A 109 mL portion of that solution is diluted using 121 mL of water. What is the final concentration
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