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1. a. A WLAN uses the 1-Mbps IEEE 802.11 infrared standard and the 16-PPM modulation scheme. Compute the period of transmission (time between bits). b. What is the average time between pulses (1 values) and the corresponding average rate of pulse transmission? c. Compute the minimum time between adjacent pulses d. Compute the maximum time between adjacent pulses. 2. For IEEE 802.11a standard, describe how the modulation technique and coding rate determine the data rate. 3. a. List at least four network devices required to implement a WLAN. b. Describe the role each device plays in the implementation of the WLAN. c. Describe how an ad-hoc LAN is different from an infrastructure WLAN.
PET has a permeability to carbon dioxide of 0.227x10^-13(cm^3 x cm)/(cm^2 x s x Pa) at 25 C. Given that the activation energy for permeability is 27 kJ/mole, at what temperature would the permeability be ten times higher
Calculate the change in pH when 7.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq).
Putrescine is a compound that is partially responsible for the rotten smell of decaying flesh. It consists of 54.50% C, 13.73% H, and 31.77% N. What is the empirical formula of putrescine?
Problem- Blood cholesterol level measures 1.36x 10^2 milligrams per deciliter. What is the value in micrograms per nanoliters
For the reaction of the ammonium ion with nitrous acid, the net reaction is NH4 (aq) + HNO2(aq) yields N2(g) + 2H2O (l) + H (aq) If the initial concentration of nitrous acid is 1.00 M and after 48.1 s has elapsed, the concentration of nitrous acid..
Calculate the number of moles of sodium carbonate present in a mixture of sodium bicarbonate, sodium carbonate and a neutral component if 6.0 ml of 0.100 M HCl were used to titrate 0.200 g of this mixture with phenolphthalein as the indicator.
suppose that you suspend a 10.0kg mass of iron from a height of 200metes. the outside temperature is 300ka. what is the
A compound of formula C6H10O2 shows only two absorptions in the 1H NMR spectrum: a singlet at 2.67 ppm and a singlet at 2.15 ppm. These absorptions have areas in the ratio 2:3. The IR spectrum shows a strong absorption at 1708 cm-1. Propose a stru..
The chemical reactions that are used in the anion spot tests in this experiment are for the most part simple precipitation or acid base reactions. Given the information in each test procedure, try to write the bet ionic equation for the key reacti..
An iron bar of mass 885 g cools from 94°C to 5°C. Calculate the heat released (in kilojoules) by metal.
Problem- The starship enterprise is caught ni a time warp and Mr. Spock is forced to use the primitive technique of the 21st century to power the spaceship. He foolishly decides to generate heat energy by diluting pure sulfuric acid with water to ..
Consider ATR sampling using a trapezoidal ZnSe crystal. In the mid-infrared region, refractive indices for ZnSe and water are approximately 2.4 and 1.3, respectively. What is the penetration depth (?m) for IR radiation of 1600 cm-1 if it strikes t..
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