# Category Archives: Economics

## Calculate p(0) such that p(y) is normalised.

A PCM transmitter sends out a 12-bit serial digital signal with 5 V corresponding to a 1 and 0 V corresponding to a 0. The signal passes over a transmission link, affected by random noise, to a PCM receiver consisting of a low-pass filter and a comparator. The comparator input signal is the PCM signal with noise superimposed on it; the probability density p(y) of this noise is the triangular function shown in Figure Prob. 2. The comparator decides that a 1 has been transmitted if the comparator input signal is greater than 2.5 V, and that a 0 has been transmitted if the comparator input signal is less than or equal to 2.5 V.

(a) Calculate p(0) such that p(y) is normalised.

(b) Find are probability that….

## estimate the probable number of errors if 1600 bits of information are transmitted.

Ten measurement signals are input to a multiplexer so that each one is sampled twice per second. The multiplexed signal is input to a serial digital transmitter incorporating a 10-bit ADC. The resulting PCM signal is converted into FSK such that 720 Hz corresponds to a 1 and 480 Hz corresponds to a 0. Estimate the bandwidth required by the FSK signal.

(a) Random noise is characterised by a Gaussian probability density function of standard deviation  V and mean value  Using the probability values given below, calculate the probability that the noise voltage:

(i) exceeds +0.5 V

(ii) lies between −1.0 and +1.0 V

(iii) is less than −1.5 V.

(b) Information in binary form is sent with a 0 represented by 0 V and a 1 represented by 5….

## Calculate the cost per equivalent unit of material and conversion cost for January

Calculate the cost per equivalent unit of material and conversion cost for January – using the Weighted Average Approach Units Materials Conversion Work in process January 1 2,500 50% 35% Work in process January 31 45% 25% Materials cost in work in process January 1 \$25,000 Conversion costs in work in process January 1 \$10,000 Units started in production 12,000 Units transferred to the next department 8,000 Materials cost added during January \$20,000 Conversion costs added during January \$7,500 Complete the grey cells that required information. Beginning Inventory Units Started this Period Units to be accounted for Direct Materials Conversion Costs Units in process January Units completed & transferred out Ending Inventory Units accounted for Direct Materials Conversion Costs Beginning Inventory Current Costs Total Costs Equivalent Units Materials….

## use this to simplify complex fractions.

For some practice working with complex numbers: Calculate (3-4i)+(2+5i) = , (3-4i)-(2+5i) = , (3-4i)(2+5i) = . The complex conjugate of (1+i) is (1-i). In general to obtain the complex conjugate reverse the sign of the imaginary part. (Geometrically this corresponds to finding the “mirror image” point in the complex plane by reflecting through the x-axis. The complex conjugate of a complex number z is written with a bar over it: z?? and read as “z bar”. Notice that if z=a+ib, then (z)(z??)=|z|2=a2+b2 which is also the square of the distance of the point z from the origin. (Plot z as a point in the “complex” plane in order to see this.) If z=3-4i then z?? = and |z| = . You can use this to simplify complex….

## Write a 2-3 page report on any one of the following topics.

Write a 2-3 page report on any one of the following topics. A supporting paper is provided for each topic. However, the report has to be prepared based on general literature beyond the supporting paper. The deadline for the submission of the assignment is 14th January, 12 noon, 2017. Your report should have proper references/bibliography. Plagiarism is strictly prohibited! Topic 1. Impact of invasive species on native species and ecosystems. Supporting paper/s: Gurevitch, Jessica, and Dianna K. Padilla. “Are invasive species a major cause of extinctions?- Trends in Ecology & Evolution 19.9 (2004): 470-474. Molnar, Jennifer L., et al. “Assessing the global threat of invasive species to marine biodiversity ” Frontiers in Ecology and the Environment 6.9 (2008): 485-492. Didham, Raphael K., et al. “Are invasive species the….

## At which rate is VAT on salaries and wages charged?

25. On January 19 2020, Fire enterprises recorded credit sales of N\$5,000 (VAT inclusive), a cash payment for electricity of N\$600 (VAT exclusive) on February 28th. How do these transactions affect the accounting equation? (2) Select one: Ca. Asset 4,400 Owners’ Equity=4,400 + Liabilities 0 b. Asset 4,310 Owners’ Equity=4,310 + Liabilities 0 Cc. Asset 4,347 Owners’ Equity=4,347 + Liabilities 0 Clear my choice Top of Form Bottom of Form Skip Quiz navigation 26. Malimina Mills Pty Ltd is a registered VAT vendor specialising in selling maize meal and related products. The following information was compiled for the month of May 2019: On 05 May 2019, sold maize meal to PicnPay for N\$450,000 (including VAT) on credit. On 10 May 2019, purchased Corn from Corny Shop for N\$300,000….

## Identify any zero force members by inspecting the joints and list them.

The truss shown below is supported by a pin at A and a rocker at G. Each of the six horizontal members at the bottom of the truss are 2 m in length. (1) Identify any zero force members by inspecting the joints and list them. (ii) Determine the support reactions at pin A and rocker G. (ili) Determine the forces in members KJ, CJ and CD. Indicate if each of these is in tension or compression by writing (T) or (C), respectively, next to their values. Note: Free body diagram(s) must be drawn for full credit. 6 kN 3 kN 12 kN 9 kN 6 kN – H 3 m A . OLDTOO 2 B E F – C D — 12 m, 6 @ 2 m….

## Solve the following systems of equations 6x +3y-1 9x+5y-1 4x+y-2z = 0 b. 2x-3y+3z-9 -6x-2y + z-0 a.

1. Solve the following systems of equations 6x +3y-1 9x+5y-1 4x+y-2z = 0 b. 2x-3y+3z-9 -6x-2y + z-0 a. 2. Solve each of the following equation a. 4x-3+2-11 b. 2x-3 2(x -3) 3. Find the equation of the line that contains the given pair of points 4. Line L contains the point (5, -3) and has a graph parallel to the graph of 2x -5y -10. Find the equation for L. 5. Simplify the following expressions a. 4×2)-3×3 b. (6×2 -3x +2)-(4×2+2x-5 (12x 2) Factor completely for the following: a. 6x*-11×3 -10×2 6. b. x+4×2 -9x -36 Solve the following equations: a. (X+2)(x-5)=8 7. b. x+4×2 -9x -36-0 8. Reduce the following to the lowest term x2-x-6 a. b. 2y-32y2 9. Simplify the following to the lowest term….

## determine the maximum yield? T

When an apple orchard owner plants 65 trees on an acre of ground, he gets an average yield of 1500 apples per tree per year. For each additional tree planted per acre, the annual yield per tree drops by 20 apples. Use this information to answer the next two questions. 54. Let x represent the number of additional trees above 65. Determine a formula for the number of trees (T) and the number of apples per tree (A). (A) and and T = 65x T = 65 + x T = 65x T = 65 + x T = 65 + x (C) (D) (E) and A = 1500 – x A= 1500 x A = 1500 – 20x A = 1500 – x A = 1500 –….

## Discuss in detail the applications, advantages and disadvantages of the piezo electric sensor?

TASK 2 The Figure 2 shown below is a Piezo Electric Circuit to measure the change of pressure, force, temperature, strain and acceleration. +5Volt R2 R3 R4 333 2200 X Piezo Diaphgram T2 BCS4 Speaker C1 tu BC548 Ground Fig. 2 Piezo Electric Circuit to measure the change of pressure, force, temperature, strain and acceleration For the Circuit shown above: a. Explain in detail the Working principle of operation of the circuit. (10 Marks) b. Derive the necessary voltage and current equations from the circuit and also briefly explain the output signals generated at each component. (30 Marks) C. Draw the input and output waveforms generated at the output using CRO. (10 Marks) d. Discuss in detail the applications, advantages and disadvantages of the piezo electric sensor? (20….