Question A transmitter operating at 80 MHz has an output power of 1.5 kW which is fed to an antenna with a gain of 20 dB. Determine the "keep-out" distance (in meters) required to meet the safety standard. 100 10 Power density (mW/sq. cm) Pen 0.1 1 10 1001-103 1-104 1103 fcm MHz Frequency (MHz) Radiated EM Safety Standard Levels

please answer the question in clear font and show me the specific solutions. I will appreciate for that. Thank you a) Complete the following table for the family of dc-dc converters that are not isolated. The subscripts are as follows: 'o' is the output, 'd' is the input, 'L' is the inductor, 'D' is the diode, 'A' indicates the maximum instantaneous step in current. A capital 'l' indicates the average value as opposed to 'Alc' which indicates the magnitude of the step in current in the capacitor (if no step then this would represent the ripple). Converter Topology V./V. DCM V./V. CCM Lf, for CCM la (A) (A) CCM CCM 1 (A) Alc CCM* Apk-pk Ссм ΔΙ, Apk ссм Buck D DI 1. 1 1-D Lfs D(1 - DR 2 1. (1-D) D 1-D R D 2Lfs I. (1-D) 1 (1-D) + D) 2lfs 1. * For these columns express the answer in term of Lfs, the load current, lo, load resistance, Ro, and modulation depth D (8 marks) b) A power supply is required that converts 100 to 6V with a maximum output current of 4A into a 20 load. Assuming a Buck converter operating in CCM, calculate the input current, ld, and the inductor current ripple Al. (Your answers above may help) [2 marks] c) In the same circumstances, but using a Buck-Boost circuit, highlight the difference in the specification of the inductor current, l. [1 marks) d) A power supply is required to boost a 12V battery output to 48V. Compare the operation of the boost converter with the operation of the buck-boost converter, both circuits operating in CCM. Specifically determine the required, D, in each case and compare the average inductor current

1. For a Solid Oxide Fuel Cell that uses hydrogen as fuel, calculate the maximum energy output possible at 800°C. 2. For a methanol fuel cell with total reaction equation and AG given, calculate the open circuit voltage. CH;OH + 3/2 O2 2H2O + CO2 AG = -698.2 kJ/mol 3. H2O is electrolyzed using an SOEC reactor. Inlet of the cathode has 30ml/min H20, outlet of anode has 5ml/min O2, and applied current is 2A. Calculate the H2O conversion and Faradaic efficiency (both in %). (Flow rates are given for gas phase in STP)

please help. with brief is possible. thank youwith 1 a, 1 b, 2 and 3 EXPERIMENTS Post-Laboratory Questions 1. In Step 24, you were instructed to wash the precipitates on the filter paper. a. Why was it necessary to wash the precipitate before drying. b. You were instructed to use dilute nitric acid to wash silver chloride, and to use distilled water to wash barium sulfate and calcium carbonate. Why was water used, in place of nitric acid, to wash barium sulfate and calcium carbonate? 2. Some precipitate is lost when the filter paper and precipitate is removed from the drying oven. The her paper and precipitate is subsequently weighed. Would the calculated percent by mass of the unknown lon in the compound be higher or lower than the true value? Justify your answer with an explanation 3. If the filter paper containing the precipitate is significantly charred in the drying oven because the oven temperature is to high, would the calculated percent by mass of the unknown lon in the compound be higher or lower than the true value? Justify your answer with an explanation

The probability density of a random variable $x$ is $$f(x)=a\ \cdotp x^2\ \cdotp \mathrm{e}^{−kx}\ (k>0,\ 0\leq x\leq \infty)$$ Then, the coefficient $a$ equals $$(i)\frac{k^3}{2}\ \ \ \ (ii)\ k^3 \ \ \ \ (iii)\ k^2 \ \ \ \ (iv)\ k \ \ \ \ (v) \frac{2\ \cdotp k}{\pi}$$ Here is what I've tried: $$\int_0^\infty f(x)\mathrm{d}x = 1$$ $$\int_0^\infty\left(a\ \cdotp x^2\ \cdotp \mathrm{e}^{−kx}\right)\mathrm{d}x = 1$$ solving by parts gives result as $$\left[-\frac{a\cdotp\mathrm{e}^{-kx}}{k}\cdotp\left(x^2+\frac{2x}{k}+\frac{2}{k^2}\right)\right]^\infty_0 = 1$$ Now, here I'm stuck. Can't find a way to solve $a$.

I have this question on a work sheet, I have completed part a, b, and c. However I'm not too sure how to work out the last part of it. Any tips or hints would be very much appreciated. Thank you! A prisoner in solitary confinement amuses himself by playing snakes and ladders. He uses a single six-sided die, and his counter starts at square $1$ . There is a ladder going from square $3$ to square $6$ , a ladder from square $4$ to square $8$ , a snake from square $7$ to square $2$ , and a snake from square $9$ to square $1$ . The game is finished when the counter reaches square $10$ and he needs to throw exactly the right number on the die to finish; if it is too large the counter remains unmoved. Use a vector $x(t) = (p_1, p_2, p_5, p_6, p_8, p_{10})^T$ for the probabilities of the counter being on square $(1,2,5,6,8,10)$ respectively at discrete time $t$ . Determine the probability $P(t)$ that the game has not finished at time $t$ . Plot $P(t)$ for $0 \leq t \leq 50$ . We are using matlab :)

The students can now conclude that: dc is divergent. In Planck's Radiation Law, we encounter the integral dx x5(ex – 1) + + 2e* 1+tse .00 of rolex - 1) Yx dec 2 е is convergent. dx sole - 1 1. Explain why a graph of the tangent line to et at t = 0 tells us that for all t. 1+t set X > 3 dx dc 25(e; - 1) < 3 oc dx 2. Substituting t = 1/x, show that for all x = 0 x’le1) x SUBMIT e1/– 1 > X 11 3. Use the comparison test to show that the original integral converges. ana 3a WP