Determine the maximum possible COP if heat is extracted from the outside atmosphere at (a) 10 °C, (b) 0°C, (c) –10 °C, and (d) -40 °C. Express each CcOP numerically to three significant figures, separated by commas.
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- A house is heated and maintained at 20 °C by a heat pump. Part A Determine the maximum possible COP if heat is extracted from the outside atmosphere at (a) 10 °C, (b) 0 °C. (c) – 10 °C, and (d) – 40 °C. Express each COP numerically to three significant figures, separated by commas. COP10 °C, COP, °C, COP_10 °C, COP 40 °C = Submit Previous Answers Part B Based on these results, would you recommend heat pumps at locations with a severe climate? Match the words in the left column to the appropriate blankes in the sentences on the right. Reset Help mild 1. Given that a real heat pump is significantly efficient than a Carnot heat pump, the more advantage of a heat pump over electric heating rapidly when the outside temperature becomes really low. increases less 2. As the COP decreases, the heating power decreases 3. A heat pump is ideal for a climate. severe Submit Request AnswerQ8): To find how much heat is required to bring a kettle of water to its boiling point, you are asked to calculate the specific heat of water at 61°C. The specific heat of water is given as a function of time in Table below. Temperature, T Specific heat, C₂ (°C) J kg-°C 22 42 52 82 100 4181 4179 4186 4199 4217 Determine the value of the specific heat at 7=61°C using the direct T method of interpolation and a third order polynomial. Find the absolute relative approximate error for the third order polynomial approximation (Lagrange Method).25 Question 10 Anwer 2 g of air in a piston cylinder is compressed isothermally. The initial temperature is 399 K, the initial pressure is 7.1 bar, and the final volume is 2.8 litres. What is the heat transfer during the process? Give your answer in Joules to the nearest whole number. Far air co1.005 kJ/kgK and cy- 0.718 kJ/kgK.
- 1:34 ull Telegram ex ch 2.p... Q1) A turbine model having the following specifications was made to predict the behaviour of the actual turbine: Pt = 15'8 HP H= 12 m N= 474 rpm, Model scale n =10 Determine the speed of the actual turbine runner and its power developed if the overall efficiencies of the turbine and its model are equal. Find the type of turbine of which the model was made. Q2) A model turbine is provided with a runner 2 m in diameter. It is found to develop 64 HP under a head of 100 m when running at a speed- of 4,000 rpm. Calculate the specific speed. It is required to build a similar turbine to develop 200 HP under a head of 120 m. Calculate the required diameter. Prove any formula used. ActivaQ1. The following data is obtained during geothermal drilling operation. Rock density = 1550 kg/m ³, heat capacity of the rock = 0.00163 J/kg K, temperature difference = 80 K. How much will be the thermal heat content of the rock at the geothermal site? Discuss about geothermal gradients their importance in energy exploration. Do you think utilization of geothermal energy worldwide is increasing yearly? Justify your answer. Do you think the geothermal energy available in this site can be used for a metal melting industry?incomplete units/solution. Box your final answer and round to the nearest 2 DECIMAL PLACES 1.63 Ib of gas is stored in a tank of 2ft3. If the internal energy decreases by 27.4 BTU as temperature drops from 200F to 100F, find the specific heat at constant volume for this gas • A closed gaseous system undergoes a reversible process with constant pressure of 200kpa. 2500 kJ of heat is rejected, and the volume changes from 5m3 to 2m3. Find the change in internal energy An Ideal gas with R=25.9 Ib-ft/lb-R and k=1.1 is heated at constant volume. What is the a.) Cp and Cv? b.) mass if it initially it had a volume of 15 ft3, pressure 70 psia, and 540 R? c.) What is the final temperature if 20 Btu is added?
- %or l. Iu. A A:YA docs.google.com/forms/d/e/1l O مطلوب Untitled Section F1 F2 F3 d a F4 D Consider the following values: - a - 11 m; b - 6 m; - 8 m; d - 3 m; F1 - 3 kN; F2 - 11 kN; F3 - 2 kN; F4 - 20 kN; F5 - 2 kN; a = 30°, e = 60° , B= 30° 1] What is the resultant moment of the five forces acting on the rod about point A? c) - 4.6 KN.m d) 22.9 kN.m e) - 14.1 kN.m f) 21.3 kN.m a) -1.2 kN.m b) 12.7 kN.m 2] What is the resultant moment of the five forces acting on the rod about point B? a) 28.8 kN.m b) 42.7 kN.m c) - 1.6 KN.m d) 10.9 kN.m e) - 1.1 kN.m 1 24.2 KN.m 3] What is the resultant moment of the five forces acting on the rod about point C? a) 63.6 kN.m b) -11.1 kN.m c) 77.4 kN.m d) - 9.1 kN.m e) 24.1 kN.m f) - 85.3 kN.m 4] What is the resultant moment of the five forces acting on the rod about point D? a) 33.6 kN.m b) 83.4 kN.m c) - 1.6 kN.m d) 52.1 kN.m e) 21.1 kN.m f) - 40.1 kN.m 5] What is the moment of the force F2 about point E? a) 80.6 kN.m b) - 8.1 kN.m c) 54.6 kN.m d) 33.1…QUESTION 10 A Watt (W) is defined as one Joule (J) of energy per second (s): 1 W = 1 J/s. It is also possible to calculate the watts of an electric device by multiplying the voltage supplied, in Volts (V), by the current drawn, in Amps (A): 1 W = 1 V x 1 A. Consider an electric car with a 75 kWh (kilowatt- hour) battery. If the car consumes on average 230 Wh/mile, what is the maximum range of the car in miles? Enter your answer to one decimal place using rounding.The left side of this equation tells how much energy Q the cylinder gives to the water while it cools. The right side of this equation tells how much energy Q the water and aluminum cup absorb from the cylinder to warm up. Because it is the same energy, they are equal. What is known in this equation? Mcyl 411.7 g, malum 46.5 g, malum+water = 175 g Can you find: mwater =? g Twater = Talum = 20°C (water and cup of room temperature) 90°C, T; = 35°C (hot cylinder and cool "cylinder+cup+water" temperatures) Tcyl kCal Calum = 0.22, Cwater 1 (specific heat of water and aluminum, measured in units kg-°C What are we looking for is Ccul - How we find it? Plug all the numbers into the equation (1), Ccul will be one unknown which you can calculate from the equation. Important, convert all the masses from grams to kilograms! After you find Ccyl, compare it to known value for the copper 0.093(our cylinder is made out of copper). |Ceyl -0.093| % : · 100% 0.093
- You have the six pieces of metal listed below plus a beaker of water containing 400. g of water. The water temperature is 21.0 °C. Metals Specific Heat (J/g. K) Mass (g) 1. Al 0.9002 100. 2. Al 3. Au 4. Au 5. Zn 6. Zn 0.9002 0.1289 0.1289 0.3860 0.3860 50. 100. 50. 100. 50. The specific heat capacity of water is 4.184 J/g °C.For the following function, the value of "a" is: 6(s + 5) s (s + 4)(s+ 3) a b d Y(s) = + + + s+4 s+3 Select one: a. -0.958 b. 1.33 С. 0.375 d. 2.5 e. 0.958 O f. -0.375 g. -2.5 O h. -1.33Q1. The net potential energy between two adjacent ions, EN, is represented by %3D A В EN r pn where En is the net energy in Joule (J), A and B are constants with values of 1.436 J.nm and 7.32 × 106 J.nm, r is the interatomic distance between the two ions in nanometer (nm), and n is a positive number 8 with a value of 8. Using these information, determine the equilibrium spacing between the two ions in nanometer (nm).