Homework Answers
Work net=work output-work input=90-70=20 Joule.
Heat supplied or Heat input =100.
Efficiency= Work done / Heat supplied=20/100=.20
Therefore efficiency is 20%.
Option B is correct .
Add Answer to:
(a) In one cycle of a heat engine: 70 J are input by working, 90 J...
A, B , D ,E PLEASE SOLVE THEM ( DETAILED SOLUTION + CLEAR HANDWRITING) In this...
A, B , D ,E PLEASE SOLVE THEM
( DETAILED SOLUTION + CLEAR HANDWRITING)
In this question, assume no changes in Ek or Ep (a) In one cycle of a heat engine: 70 J are input by working, 90 J are output by working, 100 J are input by heating, 80 J are output by heating. Write down which one of the following is true: (A) |Wnet-160 J (B) Iw.et-20 J (C) η-0.25 (b) For a fixed amount of gas,...
3. An ideal Carnot engine has an input of 150 J of heat per cycle at...
3. An ideal Carnot engine has an input of 150 J of heat per cycle at its high-temperature reservoir, which is maintained at 135 °C. The engine has a thermal efficiency of 22.0%. a. How much work does this engine do per cycle? b. How much heat does this engine output to its low-temperature reservoir per cycle? c. What is the temperature of the low-temperature reservoir? d. How many cycles would this engine have to go through to lift a...
In one cycle, a certain heat engine takes in 1000 J1000 J of heat from its...
In one cycle, a certain heat engine takes in 1000 J1000 J of
heat from its high‑temperature reservoir and exhausts 700 J700 J of
heat to its low‑temperature reservoir.
What is the efficiency of the heat engine under these
conditions? 70%,30%,43%,143%,300%.
In one cycle, a certain heat engine takes in 1000 J of heat from its high-temperature reservoir and exhausts 700 J of heat to its low-temperature reservoir. Hot reservoir What is the efficiency of the heat engine under these...
If a 20% efficient heat engine does 50 J of work each cycle, it requires a...
If a 20% efficient heat engine does 50 J of work each cycle, it requires a heat input of 250 J per cycle, and dumps 200 J per cycle of heat into waste. Group of answer choices A)True B)False
During each cycle, a heat engine operating between two heat reservoirs absorbs 156 J from the...
During each cycle, a heat engine operating between two heat reservoirs absorbs 156 J from the reservoir at 100°C and releases 136 J to the reservoir at 20°C. (a) What is the efficiency of this engine? % (b) What is the ratio of its efficiency to that of a Carnot engine working between the same reservoirs? This ratio is called the second law efficiency. εengine / εCarnot =
A heat engine follows a square cycle, as shown, with an isobaric expansion, followed by an...
A heat engine follows a square cycle, as shown, with an isobaric
expansion, followed by an isochoric cooling, followed by an
isobaric contraction, followed by an isochoric heating. The gas
used in the heat engine is an ideal monatomic gas. Given
PA=100×103Pa, PB=292×103, VA=0.00324m3 and VB=0.0141m3, find the
net heat used by this engine to complete one cycle. Answer in
J.
A heat engine follows a square cycle, as shown, with an isobaric expansion, followed by an isochoric cooling, followed...
A heat engine operates in a Carnot cycle between 80°C and 350°C. It receives 21,000 J...
A heat engine operates in a Carnot cycle between 80°C and 350°C. It receives 21,000 J of energy per cycle from the hot reservoir. The duration of each cycle is 1.00 s. What is the mechanical power of this engine? Select one: a. 21 kw b. 910 kW c. 9.10 kW d. 120 kW
7. Consider a Carnot-cycle heat engine with water as the working fluid. The heat transfer to...
7. Consider a Carnot-cycle heat engine with water as the working fluid. The heat transfer to the water occurs at 150°C, during which process the water changes from saturated liquid to saturated vapor. The heat is rejected from the water at 25°C. (a) Show the Carnot-cycle on a T-s diagram (b) Find the properties (P, T, v, h, s) water at each state. Here v is the specific volume. (c) Determine the cycle thermal efficiency, net heat added and work...
A gasoline engine takes in 1.53×104 J and delivers 3500 J of work per cycle. The...
A gasoline engine takes in 1.53×104 J and delivers 3500 J of work per cycle. The heat is obtained by burning gasoline with a heat of combustion of 4.60×104 J/g. Part A What is the thermal efficiency? Express your answer as a percentage. e=? Part B How much heat is discarded in each cycle? Express your answer in joules. Q=? Part C What mass of fuel is burned in each cycle? Express your answer in grams. m=? Part D If...
The input heat of a Carnot engine is 3,000 J. The temperature of a hot reservoir...
The input heat of a Carnot engine is 3,000 J. The temperature of a hot reservoir is 600 K and that of a cold reservoir is 300 K. What is the work done? Hint: The efficiency e of a Carnot engine is defined as the ratio of the work done, W, by the engine to the input heat QH : e=W/QH. W=QH – QC, where Qc is the output heat. That is, e=1-Qc/QH =1-Tc/TH, where Tc for a temperature of...
A, B , D ,E PLEASE SOLVE THEM
( DETAILED SOLUTION + CLEAR HANDWRITING)
In this question, assume no changes in Ek or Ep (a) In one cycle of a heat engine: 70 J are input by working, 90 J are output by working, 100 J are input by heating, 80 J are output by heating. Write down which one of the following is true: (A) |Wnet-160 J (B) Iw.et-20 J (C) η-0.25 (b) For a fixed amount of gas,...
3. An ideal Carnot engine has an input of 150 J of heat per cycle at its high-temperature reservoir, which is maintained at 135 °C. The engine has a thermal efficiency of 22.0%. a. How much work does this engine do per cycle? b. How much heat does this engine output to its low-temperature reservoir per cycle? c. What is the temperature of the low-temperature reservoir? d. How many cycles would this engine have to go through to lift a...
In one cycle, a certain heat engine takes in 1000 J1000 J of
heat from its high‑temperature reservoir and exhausts 700 J700 J of
heat to its low‑temperature reservoir.
What is the efficiency of the heat engine under these
conditions? 70%,30%,43%,143%,300%.
In one cycle, a certain heat engine takes in 1000 J of heat from its high-temperature reservoir and exhausts 700 J of heat to its low-temperature reservoir. Hot reservoir What is the efficiency of the heat engine under these...
A heat engine follows a square cycle, as shown, with an isobaric
expansion, followed by an isochoric cooling, followed by an
isobaric contraction, followed by an isochoric heating. The gas
used in the heat engine is an ideal monatomic gas. Given
PA=100×103Pa, PB=292×103, VA=0.00324m3 and VB=0.0141m3, find the
net heat used by this engine to complete one cycle. Answer in
J.
A heat engine follows a square cycle, as shown, with an isobaric expansion, followed by an isochoric cooling, followed...
A heat engine operates in a Carnot cycle between 80°C and 350°C. It receives 21,000 J of energy per cycle from the hot reservoir. The duration of each cycle is 1.00 s. What is the mechanical power of this engine? Select one: a. 21 kw b. 910 kW c. 9.10 kW d. 120 kW
7. Consider a Carnot-cycle heat engine with water as the working fluid. The heat transfer to the water occurs at 150°C, during which process the water changes from saturated liquid to saturated vapor. The heat is rejected from the water at 25°C. (a) Show the Carnot-cycle on a T-s diagram (b) Find the properties (P, T, v, h, s) water at each state. Here v is the specific volume. (c) Determine the cycle thermal efficiency, net heat added and work...
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