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For Questions 12 through 17, give a specific example of a process that has the energy changes and transfers described. (For example, if the question states “
∆Eth > 0, Q = 0
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- An electrical power station uses 1.58 x 10-4 J of heat input with an efficiency of 35.7%. (a) How much work is done? (b) How much waste heat is produced by the station? (c) What is the ratio of waste heat to work output? waste heat work outputarrow_forwardHow does one answer this question?arrow_forwardplease answer the following As a gasoline engine is running, an amount of gasoline containing 12,000 J of chemical potential energy is burned in 1 s. During that second, the engine does 4,000 J of work. What is the engine's efficiency (in percent)? The burning gasoline has a temperature of about 4,300°F (2,600 K). The waste heat from the engine flows into air at about 88°F (304 K). What is the Carnot efficiency (in percent) of a heat engine operating between these two temperatures?arrow_forward
- Answer isnt -15arrow_forwardA series of thermodynamic processes is shown in the pV-Diagram (see figure on the side). In process ab, 150J of heat are added to the system, and in process bd, 600 J of heat are added. Find a) internal energy change in process ab; b) the internal energy change in process abd; and c) the total heat added in process acd.arrow_forwardA heat engine receives 500 j of heat from its combustion process and loses 391 J through the exhaust and friction. What is it’s efficiency?arrow_forward
- 27 J of heat energy is transferred into an ideal gas and 46 J of work is done on the gas. What is the change in thermal energy, in Joules? Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.arrow_forwardThe heat supplied is 500 J. The heat loss to the environment is 160 J. Step 2 Calculation: Write the expression for the work output from the heat engine. W=Q1-Q2 Here, W is the useful workout, Q1 is the supplied heat, and Q2 is the heat loss. Substitute, all known values in the above expression. W=400 J-160 J=240 J Thus, the useful work is 240 J. What is the efficiency of the heat engine in the preceding problem at top? a) 32% b) 54% c) 68%. d) 75% e) 175%arrow_forwardProblem 11: A heat engine receives heat in the amount of Q, = 750 kJ from a high temperature thermal reservoir and delivers = 270 kJ of work per cycle. W. net Part (a) Write an expression for the efficiency of the engine. Expression : Select from the variables below to write your expression. Note that all variables may not be required. a, ß, 0, a, d, g, h, j, k, m, P, Qħ, S, t, W, net Part (b) What is this efficiency? Numeric : A numeric value is expected and not an expression. Part (c) Write an expression for the amount of energy required to be rejected into the low temperature reservoir. Expression : ttps://usu34ny.theexpertta.com/Common/ViewAssignmentDetails.aspx 26/2020 The Expert TA | Human-like Grading, Automated! Select from the variables below to write your expression. Note that all variables may not be required. a, ß, 0, a, d, g, h, j, k, m, P, Qh, S, t, Wnet Part (d) How much energy, in kilojoules, is rejected into the low temperature resevoir? Numeric : A numeric value is…arrow_forward
- 1st Law of Thermodynamics - Cyclic Process 1 In the figure, pressure PA=PB = 4.80 X 105 Pa. pressure P= P =1.6X 10° Pa. Volume VA = VD= 0.0016 m², V = 0.0064 m³ Don't use scientific notations in your answers. Calculate the work done from A to B. Include a proper sign. Keep 2 decimal places. Enter a number J Submit Calculate the heat from A to B. Include a proper sign. Keep 2 decimal places. Enter a number J Submit Pressure Calculate the change in internal energy from A to B. Include a proper sign. Keep 2 decimal places. Enter a number J Submit D m³ 3 B isotherm From B to C is an isothermal (constant temperature) process. Caculate the volume at point C. Keep 5 decimal places. Enter a number Submit C Volumearrow_forwardCan you help 2a and subpart 2b 1. A certain power plant produces useful work (i.e. electricity) at a rate of 900 MW (remember, that's 900 x 106 joules/sec). How many joules of electricity does this power plant produce in 24 hours? 2a. To generate this amount of electricity, the power plant uses 2.22 x 1014 J of heat drawn from burning coal. What is the efficiency of this power plant? 2b. How much waste heat, Qc, does this power plant eject into its cold reservoir in 24 hoursarrow_forwardSuppose you spend 30.0 minutes on a stair- climbing machine, climbing at a rate of 90.0 steps per minute, with each step 8.00 inches high. If you weigh 150. lb and the machine reports that 600. kcal have been burned at the end of the workout, what efficiency is the machine using in obtaining this result? If your actual efficiency is 0.18, how many kcal did you actually burn?arrow_forward
- Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning