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The circuit below utilizes a photodiode that converts light to electrical current. Calculate the output voltage of the operational amplifier when:

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The circuit below utilizes a photodiode that converts light to electrical current. Calculate the output voltage of the operational amplifier when: a. the bridge circuit is balanced (i. e. photodiode resistance is 100 kΩ) b. the photodiode reached its resistance to 150 kΩ NOTE: Potentiometer resistance is kept at 100 kΩ level. EXPERT ANSWER Solution …

The circuit below utilizes a photodiode that converts light to electrical current. Calculate the output voltage of the operational amplifier when: Read More »

Using the solid propellant burning rate data shown below, determine (a) the ratio of burning area to throat area required for a steady combustion pressure po of 7 MPa and a combustion temperature To 2500 K. The propellant density is go- 1900 kg/ m3. The combustion gas specific heat ratio is s 1.25, and the molecular weight is 20.5; and (b) if the burning-area ratio AbAl were to increase from the value determined above by 0.7% per second, how long would it take for the chamber pressure to double? [for equations, place pressure in Pascals or N/m2] 2. o s Scale 06 atm 5

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9.6 In a gas turbine generating station the overall compression ratio is 12/1, performed in three stages with pressure ratios of 2.5/1, 2.4/1, and 2/1 respectively. The air inlet temperature to the plant is 25°C and intercooling between stages reduces the temperatune to 40°C. The HP turbine drives the HP and intermediate-pressure compressor stages; the LP turbine drives the LP compressor and the generator. The gases leaving the LP turbine are passed through a heat exchanger which heats the air leaving the HP compressor. The temperature at inlet to the HP turbine is 650°C, and rehcating between turbine stages raises the temperature to 650 °C. The gases leave the heat exchanger at a temperature of 200 °C. The isentropic efficiency of each compressor stage is 0.83, and the isentropic efficiencies of the HP and LP turbines are 0.85 and 0.88 respectively. Take the mechanical efficiency of each shaft as 98%. The air mass flow is 140 kg/s. Neglecting pressure losses and changes in kinetic energy, and taking the specific heat of water as 4.19 kJ/kg K, calculate: (i) the power output in kilowatts; (i) the cycle efficiency; (ii) the flow of cooling water required for the intercoolers when the rise in water temperature must not exceed 30 K; (iv) the heat exchanger thermal ratio. (25 540 kW: 33.4%; 224 kg/s; 0.82)

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9.6 In a gas turbine generating station the overall compression ratio is 12/1, performed in three stages with pressure ratios of 2.5/1, 2.4/1, and 2/1 respectively. The air inlet temperature to the plant is 25°C and intercooling between stages reduces the temperatune to 40°C. The HP turbine drives the HP and intermediate-pressure compressor stages; the LP turbine drives the LP compressor and the generator. The gases leaving the LP turbine are passed through a heat exchanger which heats the air leaving the HP compressor. The temperature at inlet to the HP turbine is 650°C, and rehcating between turbine stages raises the temperature to 650 °C. The gases leave the heat exchanger at a temperature of 200 °C. The isentropic efficiency of each compressor stage is 0.83, and the isentropic efficiencies of the HP and LP turbines are 0.85 and 0.88 respectively. Take the mechanical efficiency of each shaft as 98%. The air mass flow is 140 kg/s. Neglecting pressure losses and changes in kinetic energy, and taking the specific heat of water as 4.19 kJ/kg K, calculate: (i) the power output in kilowatts; (i) the cycle efficiency; (ii) the flow of cooling water required for the intercoolers when the rise in water temperature must not exceed 30 K; (iv) the heat exchanger thermal ratio. (25 540 kW: 33.4%; 224 kg/s; 0.82)

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Using the solid propellant burning rate data shown below, determine (a) the ratio of burning area to throat area required for a steady combustion pressure po of 7 MPa and a combustion temperature To 2500 K. The propellant density is go- 1900 kg/ m3. The combustion gas specific heat ratio is s 1.25, and the molecular weight is 20.5; and (b) if the burning-area ratio AbAl were to increase from the value determined above by 0.7% per second, how long would it take for the chamber pressure to double? [for equations, place pressure in Pascals or N/m2] 2. o s Scale 06 atm 5

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A type 1-1 shell-tube condenser condenses 5000 kg/h of saturated ethanol vapor at normal pressure with cooling water at 25°C. Liquid ethanol exits the apparatus at a temperature of 600°C. The water leaving the device has a temperature of 400C. Let the heat coefficient of steam side is 6000W/m2.K, liquid ethanol side is 3000W/m2K, water side is 2000W/m2K. Let’s: a) Draw device diagram, line symbol b) Calculate the heat transfer coefficient of the device. c) Calculate the amount of water needed to cool down d) Calculate the number of pipes 21x2mm if L= 50 is selected.

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Q: Considerations of fairness, power and satisfactory exchanges bring us to the question of ethics in marketing. Discuss the extent to which fairness or justice are considered key questions raised by ethics, and what that means in practice. Explain the degree to which using commonly applied ethics theories in marketing – i.e. utilitarianism, deontology and virtue ethics – is challenging to a selected organization when facing and tackling an ethical dilemma. Support your answer with relevant examples. Hint: in your essay, you need to consider the following: • Fairness and Justice is an ethical issue.: 200 words • Theories of ethics in marketing.: 100 words • Examples of ethical dilemma faced by the selected organization: 150 words • How marketing ethics theories challenge your selected organization when they are facing with the situation in which they have ethical dilemma.: 300 words . Conclusion: 50 words

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EXPERT ANSWER Fairness as Justice is an ethical issue: According to American political philosopher John Rawls, fairness in business meant the equal distribution of resources. While maximizing wealth through business, a utilitarian goal, there should also be an establishment of justice through which goods and services were distributed among peoples and nations. Fairness as justice …

Q: Considerations of fairness, power and satisfactory exchanges bring us to the question of ethics in marketing. Discuss the extent to which fairness or justice are considered key questions raised by ethics, and what that means in practice. Explain the degree to which using commonly applied ethics theories in marketing – i.e. utilitarianism, deontology and virtue ethics – is challenging to a selected organization when facing and tackling an ethical dilemma. Support your answer with relevant examples. Hint: in your essay, you need to consider the following: • Fairness and Justice is an ethical issue.: 200 words • Theories of ethics in marketing.: 100 words • Examples of ethical dilemma faced by the selected organization: 150 words • How marketing ethics theories challenge your selected organization when they are facing with the situation in which they have ethical dilemma.: 300 words . Conclusion: 50 words Read More »

A truck has a total mass of m (kg) determined to act on its mass center G. During the towing operation, the truck’s hand brake is engaged, thereby causing zero slippage at the rear wheels. What critical force T (m kN) applied on the towing cable and critical angle 8 (in degrees) will cause the truck to tip over? In that situation, what are the values (in kN) of the normal force Ng and the frictional force ſo acting at point B for each of the two rear wheels of the truck. FBD is required. 3033 DS 275

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EXPERT ANSWER Sol:- Note that the mass of the truck is not given in the statement so assuming it to be as 2000-kg(Note you can assume the mass as appropriately but value should be grater than 0 kg). Also there is mentioned ONLY about the normal reactions force N(B) that is the rear wheel and the …

A truck has a total mass of m (kg) determined to act on its mass center G. During the towing operation, the truck’s hand brake is engaged, thereby causing zero slippage at the rear wheels. What critical force T (m kN) applied on the towing cable and critical angle 8 (in degrees) will cause the truck to tip over? In that situation, what are the values (in kN) of the normal force Ng and the frictional force ſo acting at point B for each of the two rear wheels of the truck. FBD is required. 3033 DS 275 Read More »

(e) For the model estimated in part (b), calculate the predicted price and residual for each automobile in the data. Identify the two automobiles that were the biggest bargains. If required, round your answer to the nearest whole number. in the data set, which has 28 miles, and sells for $ 2 less than its predicted The best bargain is the Camry # price. in the data set, which has 47 miles, and sells for $ less than its The second best bargain is the Camry # predicted price. Miles (1,000) 22 io o 73 87 92 Price $1,000s) 16.2 16.0 13.8 11.5 12.5 12.9 11.2 13.0 11.8 10.8 8.3 12.5 11.1 15.0 12.2 13.0 15.6 12.7 8.3 101 110 28

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EXPERT ANSWER X Y XY X² Y² 22 16.2 356.4 484 262.44 29 16 464 841 256 36 13.8 496.8 1296 190.44 47 11.5 540.5 2209 132.25 63 12.5 787.5 3969 156.25 77 12.9 993.3 5929 166.41 73 11.2 817.6 5329 125.44 87 13 1131 7569 169 92 11.8 1085.6 8464 139.24 101 10.8 1090.8 …

(e) For the model estimated in part (b), calculate the predicted price and residual for each automobile in the data. Identify the two automobiles that were the biggest bargains. If required, round your answer to the nearest whole number. in the data set, which has 28 miles, and sells for $ 2 less than its predicted The best bargain is the Camry # price. in the data set, which has 47 miles, and sells for $ less than its The second best bargain is the Camry # predicted price. Miles (1,000) 22 io o 73 87 92 Price $1,000s) 16.2 16.0 13.8 11.5 12.5 12.9 11.2 13.0 11.8 10.8 8.3 12.5 11.1 15.0 12.2 13.0 15.6 12.7 8.3 101 110 28 Read More »

Select three countries in Africa. Prepare a summary for each to reveal their attractiveness for foreign direct investment. For three countries, prepare a summary analyzing their suitability for foreign direct investment.

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Select three countries in Africa. Prepare a summary for each to reveal their attractiveness for foreign direct investment. For three countries, prepare a summary analyzing their suitability for foreign direct investment. EXPERT ANSWER Three countries in Africa for Foreign Direct Investment – Egypt, Morocco, Nigeria Attractiveness for FDI in Egypt: The level of FDI in Egypt …

Select three countries in Africa. Prepare a summary for each to reveal their attractiveness for foreign direct investment. For three countries, prepare a summary analyzing their suitability for foreign direct investment. Read More »