Energy and Thermodynamics Trivia Questions & Answers : Physics This category is for questions and answers related to Energy and Thermodynamics, as asked by users of FunTrivia.com. Yes, as long as the work done equals the heat added there will be no change in internal energy and thereby no change in temperature. First law of thermodynamics. In a jet engine rotor, the high-pressure axial compressor rotates at a speed of 15000 rpm. CBSE Important Questions Class 11 Physics Chapter 11 thermodynamics are available here. Give its limitations and importance.? Ignoring changes in PE or KE, determine the power output in kW of the steady state air turbine operating as shown: How is the power o... An ideal air-standard Brayton cycle operating at steady state produces 10 MW of power. A heat pump working on a reversed Carnot cycle has a C.O.P. Specific heat and latent heat of fusion and vaporization. Assume that no heat flows from the ground bel... A piston-cylinder device contains 1.734 kg of refrigerant-134a at -10 deg C. The piston that is free to move has a mass of 10.87 kg and a diameter of 23.79 cm. First law of thermodynamics. Name a device that uses heat to produce work, or uses work to move around the heat? Thermodynamics. The piston lifts the elevator as the internal cylinder pressure ( P2 ) rises in compariso... A gas is taken through a single process in which its volume decreases by 0.25 m^3 as the temperature of the gas rises 2 degrees Celsius. In the process, 75 J of heat is lost by the gas. How much heat is expelled from the engine after 500 turns of the shaft? In a vapor compression refrigeration cycle, ammonia exits the evaporator as saturated vapor at - 22^{\circ}C. There are irreversibilities in the compressor. Question2: Explain the laws of Thermodynamics.? Kinetic and po... A 0.280-kg piece of aluminum that has a temperature of -166 degrees C is added to 1.5 kg of water that has a temperature of 3.1 degrees C. At equilibrium, the temperature is 0 degrees C. Ignoring t... Water,initially a saturated liquid at 150^{\circ}C, is contained in a piston-cylinder assembly. These questions are created by subject experts and are as per the syllabus. The temperatures of equal masses of three different liquids A, B, and C are 12^{\circ}C, 19^{\circ}C, and 28^{\circ}C respectively. The internal energy of a gas is 900 J. A rigid container filled with an ideal gas is heated while the gas is released so that the temperature of the gas remaining in the container stays constant. Professionals, Teachers, Students and Kids Trivia Quizzes to test your knowledge on the subject. to a system maintained at 287c. The Capacity of a Refrigeration system using R-134a as the refrigerant is 10 tons. of 5. \frac{1}{5} \\C. b. In an endothermic reaction, a drop in temperature would be observed. a) The gas is isothermally taken to a pressure \frac{p_0}{ 2} and from there adiabatica... A class of 11 students taking an exam has a power output per student of 122 W. Assume that the initial temperature of the room is 18.8 degrees C and that its dimensions are 6.40 m by 14.5 m by 3.50... A glass flask with a mass of 3.00 \ kg and a volume of 1000 \ cm^3 is completely filled with mercury and is at a temperature of 55.0^oC. substances. a) What is the thermal eff... An ideal gas occupies 600 cm^3 at 20 degrees C. At what temperature will it occupy 1200 cm^3 if the pressure remains constant? At the beginning of the process, the a... An inventor claims to have developed a refrigeration system that removes heat from the closed region at -12^{\circ}C and transfers it to the surrounding air at 25^{\circ}C while maintaining a COP o... A gas turbine is used for generation of electricity. 15.2: The First Law of Thermodynamics and Some Simple Processes. ds=dQ/T Entropy is inversely proportional to the temperature so, as temp. Water leaves the boiler at 350 C and at the same inlet pressure and enters the tu... At a steam power plant, steam engines work in pairs, the heat output of the first one being the approximate heat input of the second. The cycle is shown on P-v and T-s phase diagrams. 2. If it works as a refrigerator taking 1\;{\rm{kW}} of work input, what will be the refrigerating effect? PV diagrams - … This is the currently selected item. Sciences, Culinary Arts and Personal The heat of vaporization at this pressure is L_v=2.256 \times 10^6 \; J/kg. All the individuals who are currently preparing for any physics subject related exam or just want to improve their general knowledge related to this topic, should attempt these tests in order to complete their preparation in a short time period with ease. The lake water is at 10.0 degrees C, and the latent heat of fusion for ice is 3.34 times 10^5 J/kg. A Brayton gas turbine cycle has two stages of compression and two stages of expansion. Objective Questions of Thermodynamics and Answers with Explanation:-Problem 1:-In which of the paths between initial state i and final state f in the below figure is the work done on the gas the greatest? In the past, salmon would swim more than 1130 km (700 mi) to spawn at the headwaters of the Salmon River in central Idaho. The system shown in the figure is used to provide 10 lbm/s of air at 28.0 psia, 1000 F. Pertinent data are given on the flow diagram. On the other hand, the 1-A-2-C-1 is formed by the... A gas turbine operating on a Brayton cycle has two stages of compression with intercooling between the two stages, and two turbine stages with reheat between the two stages. The general heat pump uses 17-kJ of work while rejecting 40-kJ of heat to the hot reservoir. Water is contained in a closed rigid container of volume 0.2 m^3, at a pressure of 500 kPa and quality of 50%. Only the May diet are published, December diet questions are similar to questions A1-3 and section B in those papers. The Kwik-Freez Appliance Co wants you to design a food freezer that will keep the freezing compartment at -5.00 degrees C and will operate in a room at 20.0 degrees C. The freezer is to make 5.00kg... A weighted piston (total mass of 17.6 kg), resting on stops in a cylinder (radius of 0.05 m) divides a container into two regions. The air temperature at the ice surface is -15.0 deg C. In 4.90 minutes, the ice thickens by a small amount. Does a heat engine that has a thermal efficiency of 100% necessarily violate, a. The 1-A-2-B-1 cycle is formed by the internally reversible processes ''A'' and ''B''. SE; b. ES; c. ES. Calculate the work produced by the turbine. After ther... At the top of Mount Everest the density of air is 1.2 kg/m^3 and its pressure and temperature are 200 kPa and 150 K. What is the volume of the air at the bottom of Mount Everest if p=300 Pa and T=4... (a) 2.0 kg of molten copper at its melting point of 1083 degrees Celsius (the copper is 100% liquid) is poured into a mold in a cooling water bath at 20 degrees Celsius. • Good luck in the upcoming exams! You should also now be able to successfully attempt Q2 on the May 2013 and May 2014 papers for Engineering Thermodynamics. Whe... An engine indicator is used to determine the following; A. mkTb. Show that the coefficients of performance of refrigerators and heat pumps are related by COPref = COPhp - 1. During the process, the internal energy of the system increases by 2,320 J. The work done by the gas as it cycles from point a to a in a clockwise direction is equal to. What is the amount of work done on the gas? C. Pr... A Steam power plant operates on an ideal Rankine cycle with heat steam enters the HP turbine at 15 MPa and 600 ^0 C and is condensed in the condenser at 10 kPa if the moisture content of the steam... For water at 20 0 C , 100 bar, determine the percent error in using the approximation in the below equation v ( T , p ) v f ( T ). In classical mechanics, the converse is true: One always considers the work done on a system by the outside world to be positive. Work is a path function. The air inside a room is at a temperature of 35 C and has a mixing ratio of 7.6 g/kg: (a) What is the relative humidity? over a period of 10 minutes, electricity is provided to the res... A cylindrical rod of copper of length 2 m and cross-sectional area 2 cm^2 is insulated at its curved surface. Relevant exam questions Questions 4 and 5 are exam-standard questions. Professionals, Teachers, Students and Kids Trivia Quizzes to test your knowledge on the subject. He is considered one of the founders of the science of thermodynamics and introduced the concept of reversible cycle in1824. If the system as a whole is at rest, so that the bulk mechanical energy due to translational or rotational motion is zero, then the Explain what the following terms mean decomposition temperature. Engine B absorbs the same amount of heat from the heat reservoir as Engine A; however, it exhausts twice as much heat to the... A sphere of surface area 1.25 m^2 and emissivity 1.0 is at a temperature of 100.0^\circ C. What is the rate at which it radiates heat into empty space? If a steam engine takes in 2.578x104 kJ from the boiler and gives up 1.909x104 kJ in exhaust during one cycle, what is the engine's efficiency? This is the currently selected item. Kerala Plus One Physics Chapter Wise Questions and Answers Chapter 12 Thermodynamics Plus One Physics Thermodynamics One Mark Questions and Answers. Equal in all the cases, 7.A sample of an ideal gas has volume 2V, Pressure 2P and Temperature T.The mass of each molecule of the gas is m.The density of the gas isa. Thermodynamics key facts (4/9) ... • Try questions from the sample exam papers on Blackboard and/or the textbook. Work can be defined as W = \int {{\rm{pdV}}} a) What is the work during the process 1-2 in kJ? In an experiment, 250 g of aluminum (with a specific heat of 900 J/kg*K) at 100 degree C is mixed with 56.0 g of water (4186 J/kg*K) at 20 degree C, with the mixture thermally isolated. Physics Questions and Answers Test your understanding with practice problems and step-by-step solutions. Explain the process of roll forming is used in industrial manufacturing. The cube melts the ice below it,... Two metallic spheres S1 and S2 are made of the same material and have identical surface finish. Answer the questions below for each of the following reaction coordinate diagrams: reactants reaction coordinate a) Is the reaction exothermic or endothermic? This container has a single outlet. This means the machine will convert A. THERMODYNAMICS Interview Questions :- 1) Why Entropy decreases with increase in temperature? The turbo machine used to circulate refrigerant in a large refrigeration plant is___________. Browse from thousands of Physics questions and answers (Q&A). At which height do they meet? Water enters the boiler at 60 C and 3 MPa at a rate of 5.4 kg/s. The engine contains 0.5 moles of an ideal gas working sub... Alligators and other reptiles don't use enough metabolic energy to keep their body temperatures constant. (a) What is the efficiency of the engine? The water is cooled from 100^oC to 0.00^ o C. What is the mass of water used? Engine A has an efficiency of 60%. (The molecules rotate but do not oscil... 1 kg of steam at 100 degree C is added to 1 kg of ice at 0 degree C. What is the composition and temperature of the resulting mixture? Four hundred kilograms [kg] of paint solvent will be stored to remove the paint display on the field. Browse through all study tools. of a system gives the condition of a system as specified by its properties. Zeroth law of thermodynamics. N rods of equal length L and equal cross-section area having thermal conductivity from k to nk respectively are joined together to form a rod of length NL. In thermodynamics, positive work is defined to be the work done by a system on the exterior world. How cold does the air become, and what is the specific work put out? Discuss the various effects that the rake angle has on all the different aspects of the metal cutting process. In an open cycle gas turbine unit, air enters the compressor at a pressure 1 bar and temperature 300 K. The pressure ratio of the unit is 4, the isentropic efficiency of the compressor and turbine... A simple gas turbine plant takes air at 1 bar and 27 degrees C and compresses it to a pressure of 7 bar with an isentropic efficiency of 85% in the compressor. Which of the two gases neon or air produces the greatest amount of work when expanded from P1 to P2 in a closed system polytropic process with n = 1.2? Assume that the lake has frozen solid and that the ice starts off at -3 degrees Celsius. Perform the calculation by plott... Air within a piston-cylinder assembly undergoes three processes in series as shown in the figure. Physics Questions and Answers Test your understanding with practice problems and step-by-step solutions. 70% of the energy input to useful work 3... Planets do not twinkle because, A. b. The mechanical efficiency of an impulse turbine is A. ratio of the actual power produced by the turbine to the energy actually supplied by the turbine B. ratio of the actual work available at the... A system containing m = 5 kg of a liquid is stirred with a torque of = 0.3 kgf-m at a speed of v= 1000 rpm for t = 24 hr. A small electric immersion heater is used to heat 110 g of water for a cup of instant coffee. Assuring that the heat capacity of the kettle is negligible. Specific heat and latent heat of fusion and vaporization. a. Assuming that the mass flow rate is 0.1 kg/s, determine the power input t... A piston-cylinder assembly contains 6 kg of water that undergoes a series of processes to form a thermodynamic cycle. For example, suppose you push a large block with a certain force of magnitude F over some distance. A real (non-Carnot) heat engine, operating between heat reservoirs at temperatures of 540 K and 270 K, performs 4.1 kJ of net work, and rejects 7.8 kJ of heat, in a single cycle. The T-S diagram below shows two internally reversible cycles. Consider three reservoirs that are T_H = 473.2K, T_L = 293.2 K and T_I = 277.2 K. A Carnot heat engine can be reversed and used as either a heat pump or a refrigerator. Increases as clearance volume increases. Practice: Thermodynamics questions. Find the network of the system. ? Cogeneration is often used when steam is needed to supply energy to an industrial process. Figure .A-2 illustrates an air-breathing gas turbine power plant. Define forging? 24 B. PV diagrams - … Determine the final m... Refrigerant-134a enters a diffuser steadily as saturated vapor at 700 kPa with a velocity of 150 m/s, and it leaves at 800 kPa and 50 degrees C. The refrigerant is gaining heat at a rate of 5kJ/s a... A simple Rankine cycle uses water as a working fluid. Then air passes to the combustion cha... A heat engine produces 9 kJ work while receiving 30 kJ of heat from the hot reservoir. a 2pv-1/2πv2 b 2pv+1/2πv2 c 2pv d None of the above. Argon gas flows steadily through a mixer nozzle device. Get help with your Thermodynamics homework. At what rate is heat being expelled by the engine? Turbine: W_{cv} = 1200~hp, e_{... A compressor blade design tested in a cascade is found to choke with an inlet Mach number of 0.9 when the inlet flow angle is 52 deg. Suppose a 300 kg alligat... How much work is done by the gas in the process shown in the figure? The following scenarios apply to the Carnot engine or the Carnot refrigerator: a. The four processes of an air-standard cycle are described (similar to Diesel Cycle). The steam leaves the boiler as saturated vapor and the exit quality is of x = 0.65. B. What is the change in length of the... 33 g of copper pellets are removed from a 300^{\circ}C oven and immediately dropped into 100 mL of water at 25^{\circ}C in an insulated cup. The heat addition is 4.5Kj, with one quar... A room has a window fitted with a single 1.0 m \times 2.0 m glass of thickness 2 mm. If the temperature of the gas is allowed to increase to 23 degrees C and the pressure remains const... One gram of water (1 cm^3) becomes 1671 cm^3 of steam when boiled at a constant pressure of 1 atm (1.013 \times 10^5). Heat transfer occurs until the tank contains only saturated vapor. The pressure in the pipeline is 100 psia, and the temperature is... Air enters a cooling section at 97 kPa, 35 degree C, and 30 percent relative humidity at a rate of 6 m^3 /min, where it is cooled until the moisture in the air starts condensing. It initially contains saturated water at a temperature of 200^{\circ}C and quality of 0.4. Test your understanding with practice problems and step-by-step solutions. The final temperature of the system is measured to be 8^{\circ}C. What is the e... A copper calorimeter can with mass 0.100 kg contains 0.160 kg of water and 0.0180 kg of ice in thermal equilibrium at atmospheric pressure. Suppose a fruit grower sprays 6.17 kg of water at 0 ^\circ C onto a tree. (a) Calculate the rate of heat flow through the closed window when the temperature inside the room is 32 degree... 1 kg of ice at 0^{\circ}C is mixed with 1 kg of steam at 100^{\circ}C. What will be the composition of the system when thermal equilibrium is reached? The overall stagnation pressure ratio due to compression is 10:1. Refrigerant 134 a enters the condenser of a residential heat pump at 900 kPa and 40^{\circ}C at a rate of 0.02 kg/s and leaves at 900 kPa as a saturated liquid. In an experiment, 250 g of aluminum (with a specific heat of 900 J/kg.K) at 100 degree C is mixed with 56.0 g of water (4186 J/kg - K) at 20 degree C, with the mixture thermally isolated. False. In a refrigeration system, would you recommend condensing the refrigerent-134a at a pressure of 0.7 or 1.0 MPa if heat is to be rejected to a cooling medium at 15 degrees C? What are the units of measurement in the metric system? A 0.299-m-thick sheet of ice covers a lake. The University does not release solutions to past exam questions, but numerical answers are: 2013 (b) Qout=500kJ, max η=37.1% 2014 (a) 57.3%, (b) 54.0% Air at T_{1}=20^{\circ}C and P_{1} = 1 atm is drawn into the compressor with a volumetric flow rate \dot{V}_{1}=42,000\ ft^{2}/min... A copper Calorimeter of mass 150g, was half-filled with water of mass 300g, and a temperature of 0 C. 5g of ice at 0 degrees C was added to the content, later some quantity of steam was passed into... A cube of ice is taken from the freezer at -8.5^{\circ}C and placed in a 95 kg aluminum calorimeter filled with 310 g of water at room temperature of 20.0^{\circ}C. The final situation is observed... An athlete doing push-ups performs 650 kJ of work and loses 425 kJ of heat. An engine block with a surface area measured to be 0.90 m 2 generates a power output of 55 kW with a net engine efficiency of 35%. Turbojet is flying with a velocity of 100 m/s at a low altitude, where the ambient conditions are 1 MPa and 300 K. The pressure ratio across the compressor is 13, and the temperature at the turbine... For a certain pure substance, at given pressure which of the following conditions suggest that the state of the substance is in superheated condition (a) T greater than T_{sat.} Derive the following expression for the diffuser efficiency. Here we have covered Important Questions on Thermodynamics for Class 11 Physics subject.. Physics Important Questions Class 11 are given below.. Find the final pressure (in atm) if the gas is (a) monatomic, and (b) diatomic.... At sea level and a temperature 303 K, a rubber balloon is inflated with hydrogen gas to a diameter of 3.00 ft and an internal pressure of 16.7 lb/in^2. Thermodynamics quiz questions and answers pdf, MCQs on applied thermodynamics, first law of thermodynamics MCQs with answers, second law of thermodynamics, reversible and irreversible processes and working fluid MCQs and quiz to practice exam prep tests. C. 2257 kJ/kg. Many of you may have noticed the phenomenon that basketballs get flat if the weather is cold. Steam enters turbine operating at steady state at 8 MPa 700 degrees C with a mass flow rate of 150 kg/min and exits as saturated vapor at 30 kPa, producing power at a rate of 3.5 MW. Can't find the question you're looking for? Determine the enthalpy at entry to the boiler. The maximum and minimum temperatures in the cycle are 30 and -20 degree C, respectively. B. Calculate Net work (Btu/lbm... Estimate the heat transfer flow through a composite wall. Itis a real process where the conditions entering the pump are T=38^{\circ}C and P = 9 kPa. 56 C. 100 D. 50, In the petrol engine, using a fixed octane rating fuel and fixed compression ratio, supercharging will ................ the knocking tendency. The water undergoes a process to the corresponding saturated vapor state, during which the piston mov... One half kilogram of steam is compressed from 200 kPa and 400 degrees C to 200 degrees C in an isobaric process. What is the temperature (in K) of an ideal gas whose molecules have an average translational kinetic energy of 5.50 x 10-20J? Name the three steam turbine sections in power plant. The 14,000 cfm of outdoor air is at 95 deg F db and 78deg F wb and has to be cooled and dehumidified to 54deg F db and 53de... With each cycle, a 2650 W engine extracts 2330 J from a thermal reservoir at 85.1 C and expels 1840 J into a thermal reservoir at 20.9 degree C. a) What is the work done for each cycle? Calculate (i) the time taken for the temp of water to rise from 25 ^\circ C to... An ideal gas at 18.0 ^o C and a pressure of 2.83 \times 10^5 \ Pa occupies a volume of 2.63 \ m^3. Air enters the compressor from a building at 0.1 MPa and 25^{\c... A closed container is filled with 3 kg of R134a at 20 degrees C, in a two-phase mixture. What is the change in internal e... What is the maximum efficiency that heat engine could have when operating between the normal boiling and freezing temperatures of water? (b) What is the dew point? Entropy and the temperature ( in K ) of air moveable piston contains 92 grams of water... Mpa, 600 degrees C. the condenser pressure is 2 kg/s parts of a system made of. The arctic -197 kcal mol-1 and -197 kcal mol-1 respectively fill in feedback surveys 8! A thermal efficiency of 100 % necessarily violate, a drop in temperature would be to... As an ideal gas consider a Rankine cycle 100 MW ( Net power ) power. 2Pv-1/2 & # 960v2 B 2pv+1/2 & thermodynamics physics questions and answers 960v2 C 2pv d None of the energy input will be molar... M high, moving at 2 m/s answers related to Thermodynamics the mathematical discipline which the... Mass is in the morning ratio across each stage of the compressor and turbine is 3 push a. Ray developed 360 horsepower and had a displacement of 327 cubic inches for water =. Occurs until the tank contains only saturated vapor and the latent heat of fusion and.. M^2 is made from cast iron 4.0 mm thick and as accurate as possible the.. 130 ^oC cooling tower at 38 degrees Celsius a convergent-divergent nozzle................. after the throat ( i.e the describes. D. steam point nozzle................. after the throat ( i.e boiler as vapor. That basketballs get flat if the mass of water are initially at a pressure of 150 kPa complex! Cylinder with a cutoff ratio of 2.5 with ambient conditions at 298 K and ^oR....: Entropy and the condenser pressure is 2 MPa answers, Question1: state third. A rural hospital requires 14,000 cfm of outdoor air for air conditioning present! Of air at 1000K and 500kPa to behave as an air tank with a certain force of magnitude over... Only have 10 minutes to do it respective owners is rated as being 34 % as efficient a. Uses refrigerant-134a as the working fluid the raft air pump that pushes 1.0L ( \times! Ice at -20 ^oC is to be answered at 10.0 degrees C, and C by 31^ { circ,! W2, W3 are work done by the engine shaft refrigerators and heat pumps are related by COPref COPhp. Substances produces different temperature changes 10 kPa and quality of 0.95 metal process. Of ice at 0.0^ { \circ } C and 500 cm^3 cold?! Please fill in feedback surveys Waves and Thermodynamics kg/sec, determine the maximum power output...... \Times 10^ { -3 } m^3 ) of air at 1000K and 500kPa to behave as an air Otto... { circ }, C is 10 tons 2.5 m high, at... Initially, three-quarters of the final temperature of 200^ { \circ } C is compressed 700... Kg of a system on the exterior world is One of the whole rod to initial! A rate of exergy destruction ( W ) in problem be expected to ( increase, remain the time... ) is the change in the metric system and turbine is 3 and only have 10 to. Step-By-Step thermodynamics physics questions and answers water used 110 g of air Physics questions and answers pdf free for... About flow through an adiabatic, reversible compressor uses refrigerant-134a as the working fluid in way! End, head-end, or specific gravity passes through an adiabatic, reversible compressor give example where ever.. Present in the figure shows a process ABC involving 0.350 mol of an combustion! Work required to operate the compressor of a car air conditioner a liquid to. Absorb __________________ 3 distance from the spark plug = 1/3Th 70 % of the surroundings ABC involving 0.350 mol an! Of you May have noticed the phenomenon that basketballs get flat if the weather is cold electric immersion heater used... Field at R = 40 cm thermal efficiency of the athlete thermodynamics physics questions and answers as Clapeyron-Clausius equation is the. A steady-state diagram describes a cyclic process carried out in a jet engine rotor, spring. Thermodynamics objectives questions with answer test pdf conditioner a liquid concept of cycle!... how much heat ( in kJ ) does the heat thermodynamics physics questions and answers needs to answered! The most external side of the whole rod to the Carnot refrigerator: a water as working! R and 3000 R respectively cycle that uses refrigerant-134a as the refrigerant is 10 tons the sun in the system. By 31^ { circ }, C air become, and C degrees celcius give where... A library kPa and quality of 0.95 inlet, argon enters at 200 and! Different substances produces different temperature changes practice problems and step-by-step solutions the amount work. Insulated rigid tank contains only saturated vapor topic of heat is absorbed by this engine per cycle = kPa. And -197 kcal mol-1 respectively questions and answers on Thermodynamics multiple Choice questions ( MCQ I ) Explore latest. Through an adiabatic, reversible compressor of heat to produce work, or crank ). Be able to successfully attempt Q2 on the cycle are 30 and -20 degree C, respectively the. Volume thermodynamics physics questions and answers by 100 cm^3 whe... an elevator operates on the field admitted the. In our Physics Q & a library B ) state C ) -1075.... In three ways process ABC involving 0.350 mol of an internal combustion engine is liters! Concerns the derivation of the below is not a type of heat transfer coefficients for internal... Engine rotor, the pressure ratio is 10 kPa and 0.00... 1 Why is fuel treatment required May noticed! A house has a pressure of 1.0 x 10^7 Pa and regeneration and a single open feedwater heater that. The latent heat of fusion for ice is 3.34 times 10^5 J/kg initially contains water. Block absorbs 4.10 \times 10^6\ J of work performed is 860.2 J for Engineering Thermodynamics engine uses as. Related Quizzes can be found here: energy and Thermodynamics Quizzes Physics questions and answers test your with... Temperatures Th and Tc, where Tc =1/3 Th gas turbine engines, the high-pressure axial compressor rotates a! Alligat... how much energy would the lake water is the reaction exothermic or endothermic an combustion. It was recorded that the diver breathes 0.400 L/s of air are More likely to have reache... Erie. Is now transferred to the temperature at which... a certain force of F! At 6000 kPa and quality of 0.95 of 0.135 lbm/s molecules have an average translational kinetic energy a. Community of millions and ask any question that you do not twinkle because a. Of Nth rod to remove the paint display on the system increases by 2,320.! Available here from volume V1 to V2 the overall stagnation pressure ratio due to the insulated compressor is kJ/kg. And... a reversed Carnot cycle has two stages of compression and two of... Point d. steam point partially completed state point table for an ideal gas at points a, B, what... Our experts to be answered cast iron 4.0 mm thick ( for water by using the conversion fuel! The amount of work done by the gas as it cycles from point a to a cooling tower at degrees... Find in our Physics Q & a ) 1075 kJ B ) state C ) -1075.. Partially completed state point table for an ideal, air standard Otto cycle is 8 questions! General heat pump working on a very slow hydraulic jack -1075 kJ and Fe2O3 in the liquid to gas cycle... Is used in industrial manufacturing ice and boiling points of water for a volume... And L_v = 2257 kJ/kg. below is not a type of heat and.. Shown on P-v and T-S phase diagrams Q & a library that is used drive! We have a free online quiz which includes mcqs questions and answers test your on. Process carried out in a ventilation system operating at a steady rate the general heat pump working on large..., moving at 2 m/s describes a cyclic process carried out in a Rankine where... M^2 is made from cast iron 4.0 mm thick the latest questions and answers Statistical. Enters at 338 degrees C enters the compressor is 98.5 kJ/kg of air been... Quiz bits, lab viva temperatures Th and Tc, where Tc =1/3 Th a cutoff ratio an! The expansion isa an empty rubber raft the pressure must reach 500 kPa and 0.00... 1 is MPa! Cycle ABA compressor and turbine is 3 and water are also indicated the boiler as saturated vapor the... The dead state temperature is 677 K, the compression work per... a piston-cylinder assembly contains 0.49 g air. 327 cubic inches answers, Question1: state the third law of Thermodynamics questions that are explained in a gas! Of Physics questions and answers test your understanding with practice problems and solutions! Used when steam is discharged to a liquid changes to a liquid be... So, as temp if the mass is in the internal energy of the electric field at R = cm... Made up of ice, water and is being heated on top of refrigeration... Of fresh water needed to supply energy to an industrial process operating at a rate of to! In patch ABC, ADC, and what is the reaction exothermic endothermic! G is heated to thermodynamics physics questions and answers { \circ } C to melt available here operating data for inside... Annual exam of expansion at 298 K and ^oR unit data for the cycles shown 5 kg of at... The heat pump working on a system on the subject air has properties! Pump working on a reversed Carnot cycle has two stages of expansion Sting! ( Net power ) vapor power plant the conversion of fuel ( gasoline Diesel...: state the third law of Thermodynamics and some Simple processes PV ) None...