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**Q1:**12-6 In a storm, waves may have a height of 12 m and a period of 15 s. Compare the power per meter of wave front to the average values shown in Figure 12.1.See Answer**Q2:**12-6 In a storm, waves may have a height of 12 m and a period of 15 s. Compare the power per meter of wave front to the average values shown in Figure 12.1.See Answer**Q3:**The following problem is courtesy of Prof. Brian Faulkner of the Milwaukee School of Engineering who is keen to ask practical, i.e., "real world," problems (although this one is arguably more fun than practical). 3. The Z machine at Sandia National Laboratory in Al- buquerque, New Mexico, is used to perform various physics experiments. Over the span of about 95 ns (nanoseconds) it delivers an electromagnetic pulse with a peak power of 350 TW (terawatts). This peak is more power than any other generator can produce and, in fact, is more than one-percent of the power produced by all the generators in the world combined. Let us assume the power varies linearly from zero up to a peak of 350 TW in 47.5 ns and then varies linearly back to zero after another 47.5 ns. (a) How much energy, in joules, is delivered by a single "shot" of the Z machine? (b) In terms of chemical energy, a kilogram of bacon contains approximately 4700 food Calories. Which has more energy, a Z-machine shot or a kilogram of bacon? (Food Calories are actually kilocalories and there are 4184 joules per kilocalorie.)See Answer**Q4:**● The voltage and current at the terminals of an automobile battery during a charge cycle are shown below a. Calculate the total charge transferred to the battery. b. Calculate the total energy transferred to the battery. v (V) 15 10 5- i (A) 30 20 10 5 5 10 15 20 25 10 15 20 25 t (ks) t (ks)See Answer**Q5:**The numerical values for the currents and voltages in the circuit are given Find the total power developed in the circuit. a ia ib b - Vb + a Element b ic d f C + Vc Voltage (V) -8 -2 10 10 -6 ial -4 7 Current (A) -7 d 15 5 3 3 Vd e f + VfSee Answer**Q6:**Plana density O o S CO Ə to There A= الدا Ⓒ 3 ex b 9 ooo B 19 10 bord of b 3 atoms 2D repeat Planow density BE unit as 2 ah EX area 2D repeat unit 20 D T R 2 6 a - (111) Все ре F 15 1 atom in plane / unit surface 3 3 √29 I 16√3 3 * @A ra 2 a O XXX A (1 9 2 R 31 @ x A O Q 1 A above plane x under plane cell 4√3 3 17 -R 7 atoms 2 OM 2See Answer**Q7:**You can start discussion by answering the following questions and later replying or commenting on at least one of your peers' replies. Please keep online civility as per the instructions in the syllabus. Your answer and reply should be to the point and within three sentences maximum. Question 1: How do you define energy and power? Question 2: What's your thoughts on energy use and its effect?See Answer**Q8:**You can start discussion by answering the following questions and later replying or commenting on at least one of your peers' replies. Please keep online civility as per the instructions in the syllabus. Your answer and reply should be to the point and within three sentences maximum. Question 1: How is population growth affecting the natural resources of the world? Question 2: Among the conventional energy resources i.e. fossil based energy which one do you favor and why?See Answer**Q9:**You can start discussion by answering the following questions and later replying or commenting on at least one of your peers' replies. Please keep online civility as per the instructions in the syllabus. Your answer and reply should be to the point and within three sentences maximum. Question 1: What do you think of "Global Warming"? Question 2: If you are the top leader (i.e. president/prime minister/king/ameer etc.) of your own country, what you'll do to make the country more sustainable?See Answer**Q10:**You can start discussion by answering the following questions and later replying or commenting on at least one of your peers' replies. Please keep online civility as per the instructions in the syllabus. Your answer and reply should be to the point and within three sentences maximum. Question 1: What are the benefits of hydropower? Question 2: How does a hydroelectric power station impact the environment?See Answer**Q11:**Section 1: Conceptual Questions & Units (14 pts) 1. How would you explain the difference between power and energy to a. your colleague? b. your grandma? Feel free to use diagrams and fully reference your answer. (2 pt) 2. Please briefly define or express the following terms (6 pts) a. Watt (W) b. Kilowatt (kW) c. Megawatt (MW) d. Gigawatt (GW) e. Kilowatt Hour (kWh) f. British Thermal Unit (BTU) g. Calorie (cal) h. Joule (J) i. Nameplate capacity j. Capacity Factor k. Heat Rate I. Anthropocene 3. Explain one major transformation in the world's energy usage in the past decade? What caused this change? (1pt)See Answer**Q12:**Section 2: Top-Down Energy Planning ( 31 pts) 4. Suppose a coal power plant has a heat rate of 10,000 BTU per kWh. If 1,000,000 kg of coal were burned, how much energy would be produced in GWh? (1 pt)See Answer**Q13:**5. Suppose a power plant has a nameplate capacity of 1 GW and a capacity factor of 0.8. If it operated for 1 full year, how much energy would it generate? (1 pt)See Answer**Q14:**You are a newly-hired energy planner for the city of Exampleville. Mayor Bigshot has decided that the city should become energy-independent, and has asked your supervisor, Bossperson, for a report discussing different options for doing so. Bossperson has tasked you with performing some calculations and discussing the strengths of different options based on those calculations. 6. There are 100,000 homes in Exampleville, and the average home has the following daily power demand profile. Each hour is an hour in a day, and "Watts" describes the average power demand during that hour:/nHour 1 Watts 600 Hour Watts 2 600 3 600 600 800 67 8 1000 1100 1200 1200 1000 1000 9 10 11 12 1200 13 14 15 16 17 18 19 20 21 22 23 24 1000 1000 1100 1500 1600 2200 4500 2200 1800 1000 800 600 a. How much energy in kWh does the average home use in a 24 hour period? (1 pt) b. How much energy in kWh does the average home use in 365 days? (1 pt) c. How much energy, in MWh, do all of the city's homes combined use in 365 days? (1 pt) d. Exampleville has several options for generating electrical power, each with different characteristics, listed below:See Answer**Q15:**Plant Type Coal Combined Cycle Natural Gas Nuclear Solar PV Panel + Battery Avg. Nameplate Capacity 228 MW³ 500 MW4 1,000 MW5 150 watts / m² Battery Max Discharge: 25% of Capacity Avg. Heat Rate ¹ 10583 BTU/kWh 7687 BTU/kWh 10429 BTU/kWh N/A Avg. Capacity Factor² Number of combined cycle natural gas plants: Number of nuclear power plants: 0.59 0.50 0.91 0.166 a. How many power plants of each type would be needed to meet the city's annual energy requirements if energy was sourced only from one type? Please round up. (4 pts) i. Number of coal of plants: ii. iii.See Answer**Q16:**Section 3: Planning roof-top solar for an O'Neill colleague (20 pts) A colleague of mine is interested in rooftop solar energy generation. Below is his electricity use from Duke in the past year and a half. Kwh Year Month/na. What is his average monthly electricity usage and his total annual usage? (2 pts) b. Assume he would like to get an electric car in the future, so the system specification should be at 150% of his total annual electricity use. How many 400 W photovoltaic panels will my colleague need? State your assumptions clearly, including how many hours of sunlight he will get in Bloomington Indiana. (5 pts) c. How much does it cost to install solar panels? Most installers set the price according to the system's wattage, with the average cost between $2.50 and $5 per watt. Please give us the range of your cost estimate. (5 pts) d. Should he buy the solar PV system? Discuss any US governmental incentives for such a system at the moment and how would you convince him one way or the other? (8 pts)See Answer**Q17:**Section 4. Energy in Your Life (25 pts) In this homework assignment you are going to estimate your daily and yearly electrical use. 1. Make a list of all the electrical appliances you use in an ordinary day, including light bulbs, HVAC, blow dryers, TVs, microwave oven, refrigerator, computer, stove, washer, dryer, etc. If you live in a coop etc, list just the appliances that you use yourself (and be aware that you'll be underestimating your energy use in this assignment). Alternatively, you could also calculate your "share" of energy use in communal spaces. 2. Find the wattage or amperage ratings of these appliances by checking the labels. Write these numbers next to the appliance on the list. My radio uses 6 watts, but an iron might use 1200 watts. 3. Keep track of how many minutes or hours you use these appliances in one day. Convert to hours (10 minutes = 10/60 hr = 0.17 hr). Refrigerators get 24 hrs of use/day. List the hours of use/day on your list, beside the appliance and its power use./n4. If your appliance has a wattage rating, multiply the number of watts by the number of hours used per day. This is the number of Wh of energy that appliance used in a day. If your appliance only gives an amperage rating, multiply the amps times 120 V (the voltage of the electrical line) to get an approximate wattage. [Note: Power (watts) is the work done per unit time = | (current measured in amps) x V (voltage measured in volts).] Then follow the instructions above to estimate kWh. Write the kWh used per day on the line with the appliance. Also note appliances that use standby energy. 5. Add up the total kWh used by all your appliances in a day to get the total daily energy use.See Answer**Q18:**Radio Iron Watts 6 Amps Hrs/day (actual Hrs/day Wh/d use) (standby use) 10.9 2 0.2 12 239.8 kWh/day kWh/yr 0.01 0.24 4.38 87.53 Reference Next, we want to know how much CO₂ you generate from your energy use. One kWh of electricity generated in a coal-fired power plant (our main power source) produces about 2 pounds (lbs) of CO₂. Oil and natural gas produce less. 1. Calculate the CO₂2 produced during your yearly energy use, assuming coal power./n2. Double the number from #1 to account for the CO-2 you produced indirectly through the purchase of goods and services that need energy. 3. Convert from pound (lbs) of CO₂ to tons of CO₂ by dividing by 2000. (2000 lbs = 1 ton). Finally, discuss your energy use in light of the following information. Americans typically generate between 11 and 25 tons of CO₂ annually per person (or ~17 tons of CO2 annually per person). Currently, worldwide release of CO₂ from fossil fuel combustion and industrial processes is about 36.8 billion tons per year (EIA, 2023). Since the planet's population is now 7.8 billion, each person's average share of CO₂ should be about 4.7 tons/year. To slow climate change, some suggest that we need to reduce our usage to just two tons per person per year. How close do you come to two tons/person, and how close do you think you could come, now that you know the impacts of your energy use?See Answer**Q19:**1) A load consisting of a 452 resistor, a 502 inductor and a 302 capacitor in series. The source is at 120 V (rms). Find the following. a) The source current (in phasor form). b) The real and reactive power consumed by the load. a) 5 points b) 5 points Z = R + j(X₁Xc) = 4+j2 V₂ 1=¼/= I = 24-j12= 26.83Z-26.57° A Z S = V₁I* = 2880 +j1440 P = 2880 W, Q = 1440 VarSee Answer**Q20:**2) The voltage and current of a Y-connected load are: Vab=25/15°V, Ic = 10275⁰ A Find the total real power consumed by the load. Note: read the subscripts of the voltage and current carefully. Ve Vc: 5 points P30: 5 points 25 √3 P36 = 3. Vab √3 P30 = 3|vc||1c| cos 25 √3 25 √3 00v. 01 105° - 75° = 30° €490° <15° +90° 10.cos(30°) = -Z105° = 375 W consumed by the load.See Answer

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