Numerade

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The figure shows four identical conducting spheres that are actually well separated from one another. Sphere W (with an initial charge of zero) is touched to sphere A and then they are separated. Next, sphere W is touched to sphere B (with an initial charge of -30e) and then they are separated. Finally, sphere W is touched to sphere C (with an initial charge of 46e), and then they are separated. The final charge on sphere W is 22e. What multiple of e gives the initial charge on sphere A? A B C W Number i Units

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The minimum depth, d (in metres), of water in a harbour, t hours after midnight, can be approximated by the function d(t) = 5 cos(0.5t) + 12, where 0 ≤ t ≤ 24. By what time, to the nearest minute, will the water reach a depth of 7.5 m?

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Problem 5 (20 marks) Consider a communication system using 8PSK to transmit eight equiprobable messages over an AWGN channel, with symbol duration $T_s$ and symbol energy $E_s$. The noise power spectral density is $N_0/2$. 1) (5 marks) Plot the constellation diagram. 2) (5 marks) Determine the optimal decision region for each message in the constellation diagram obtained in 1). 3) (10 marks) Find a set of orthonormal basis functions and use them to represent the eight messages.

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1) In Go-Back-N ARQ protocol which uses a window size of 1000, the transmitter receives a negative acknowledgment (REJ900) after it sent frame 950. In this case the transmitter must retransmit frames: (a) 900 to 950 (b) 1 to 900 (C) 900 to 1000 (d) 900 only 1.1 (a) (b) ( (c) (d) Frame 900 is lost and the receiver gets frames 901 to 1000. In this case the receiver should: (a) wait for frame 900 (b) send RR1 (c) send NARR900 (d) time out and send a special acknowledgment 1.2 (a) (b) (c) (d)

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Compared to physically active individuals, sedentary individuals have ____. Select one: a. ten times the risk for coronary heart disease b. three times the risk for coronary heart disease c. five times the risk for coronary heart disease d. twice the risk for coronary heart disease

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Erikson's stage of identity versus role confusion coincides with Freud's ____ stage of development. genital latency phallic anal

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Reactor Test Rig Fill all the blanks with calculations explanation. Reactortype= Single-stage CSTR Reactor volume= 4L Temperature (Â°C) Flow rate of NaOH, FNOH (mL/min) Flow rate of EtAc, FET (mL/min) Total flow rate, Fo (mL/min) = FNOH + FET Residence time, T (min) Inlet concentration of NaOH, FNAOH (uni/mw) Inlet concentration of EtAc, FET (uni/mw) Outlet concentration of NaOH, COHM (uni/mw) (from calibration curve) Outlet Conductivity (mS/cm) (Self-calculate) (from calibration curve) Conversion, X (%) (Self-calculate) Time (min) Outlet Conductivity (mS/cm) 0 7.65 5 10 15 20 25 30 30.7 30.8 31.7 31.8 247 228 249 249 10.72 10.64 7.23 7.00 30.9 31.8 238 246 10.32 10.50 6.89 30.9 32.0 218 246 6.77 31.0 32.0 212 241 10.34 6.68 31.1 32.1 211 247 10.45 6.55 Fo,wg= Tangs

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Use guidelines for the partial fraction decomposition to choose the correct form of decomposition of the rational function $\frac{x-7}{(x^2+x+1)^3}$ Answer 2 Points $\circ \frac{B_1x}{x^2+x+1} + \frac{B_2x}{(x^2+x+1)^2} + \frac{B_3x}{(x^2+x+1)^3}$ $\circ \frac{B_1x+C_1}{x^2+x+1} + \frac{B_2x+C_2}{(x^2+x+1)^2} + \frac{B_3x+C_3}{(x^2+x+1)^3}$ $\circ \frac{B_1}{x^2+x+1} + \frac{B_2}{(x^2+x+1)^2} + \frac{B_3}{(x^2+x+1)^3}$ $\circ \frac{B_1}{x^2+x+1} + \frac{B_2x}{(x^2+x+1)^2} + \frac{B_3x^2}{(x^2+x+1)^3}$

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Determine the voltage $V_x$ in the circuit below.

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Question 1/20 What is the purpose of the following code segment? int val1 = 2, val2 = 7; int i, j; for(i = 1; i<val1; i++); { j = i; while (j<val2) { cout<<"*"; j++; } } 1.It will print 18 stars on the same row. 2.It will print 9 stars on the same row. 3. It will print 6 stars on the same row. 4.It will print 5 stars on the same row. 5. It will print 4 stars on the same row. 6.It will print stars infinitly on the same row.

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brenda w.