Questions - TTU Physics
... length ℓ. It oscillates in a plane with no friction. The total mechanical energy is E = [(L2)/(2mℓ2)] + mgℓ(1 – cosθ). L is the angular momentum about the suspension point. θ is the oscillation angle. θ = 0 is where the wire is vertical. See figure In what follows, make the small θ approximation ...
... length ℓ. It oscillates in a plane with no friction. The total mechanical energy is E = [(L2)/(2mℓ2)] + mgℓ(1 – cosθ). L is the angular momentum about the suspension point. θ is the oscillation angle. θ = 0 is where the wire is vertical. See figure In what follows, make the small θ approximation ...
1 Basic problems for ideal gases and problems to the first law of
... 4) A thermodynamic cycle is given by Figure 3. The working gas is oxygen (O2). What is the thermal efficiency of the cycle, if the followings are given: , ratio of compression is 6? What is the thermal efficiency of a special Carnot-cycle works in between the same temperature limits belong to proble ...
... 4) A thermodynamic cycle is given by Figure 3. The working gas is oxygen (O2). What is the thermal efficiency of the cycle, if the followings are given: , ratio of compression is 6? What is the thermal efficiency of a special Carnot-cycle works in between the same temperature limits belong to proble ...
Corporate Profile
... Want to relate variables of state to each other. Experiments have found that gases follow approximately the same equation of state over a wide range of conditions. Although the atmosphere is a mixture of gases, it behaves as though it is a single “ideal” gas: • made up of a large number of molecules ...
... Want to relate variables of state to each other. Experiments have found that gases follow approximately the same equation of state over a wide range of conditions. Although the atmosphere is a mixture of gases, it behaves as though it is a single “ideal” gas: • made up of a large number of molecules ...
Molar Heat Capacities of an Ideal Gas
... As the internal energy of a system involves both work W and heat Q, exchanged between a system and its environment, we need to have a way of computing W and Q. We first look at W and restrict our attention to an ideal gas situation for which there exists an equation of state: [PV=nRT]. Consider n mo ...
... As the internal energy of a system involves both work W and heat Q, exchanged between a system and its environment, we need to have a way of computing W and Q. We first look at W and restrict our attention to an ideal gas situation for which there exists an equation of state: [PV=nRT]. Consider n mo ...
Unit 61: Engineering Thermodynamics
... • Q1-2 is the heat transferred to the system during the process from state 1 to state 2. • W1-2 is the work done by the system on the surroundings during the process • E2 and E1 are the values of the property E. • E represents all the energy – kinetic (KE), potential (PE) and internal (U) (which inc ...
... • Q1-2 is the heat transferred to the system during the process from state 1 to state 2. • W1-2 is the work done by the system on the surroundings during the process • E2 and E1 are the values of the property E. • E represents all the energy – kinetic (KE), potential (PE) and internal (U) (which inc ...
Document
... A heat engine A heat engine is a device that uses heat to do work. A gasoline-powered car engine is a good example. To be useful, the engine must go through cycles, with work being done every cycle. Two temperatures are required. The higher temperature causes the system to expand, doing work, and t ...
... A heat engine A heat engine is a device that uses heat to do work. A gasoline-powered car engine is a good example. To be useful, the engine must go through cycles, with work being done every cycle. Two temperatures are required. The higher temperature causes the system to expand, doing work, and t ...
two stroke engines
... As piston moves for TDC to BDC, the inlet valve gets opened while exhaust valve remains closed and fresh air-fuel mixture enters the cylinder. As piston moves for BDC to TDC, both inlet and exhaust valves remain closed and air-fuel mixture inside cylinder gets compressed. Highly compressed air-fuel ...
... As piston moves for TDC to BDC, the inlet valve gets opened while exhaust valve remains closed and fresh air-fuel mixture enters the cylinder. As piston moves for BDC to TDC, both inlet and exhaust valves remain closed and air-fuel mixture inside cylinder gets compressed. Highly compressed air-fuel ...
Unit 1, Lecture 3 - Massey University
... transfer of energy by heat in thermal processes and the transfer of energy by work in mechanical processes Although Q and W each are dependent on the path, Q + W is independent of the path. Neither can be determined solely by the end points of a thermodynamic process The concept of energy was genera ...
... transfer of energy by heat in thermal processes and the transfer of energy by work in mechanical processes Although Q and W each are dependent on the path, Q + W is independent of the path. Neither can be determined solely by the end points of a thermodynamic process The concept of energy was genera ...
Some ideas from thermodynamics
... Carnot’s discussion of the efficiency of heat engines led naturally to the concept of entropy, although it was not until the end of the 19th Century that Boltzmann was able to give a physical interpretation of entropy in terms of degree of order and probability. Now in the Carnot engine, we note tha ...
... Carnot’s discussion of the efficiency of heat engines led naturally to the concept of entropy, although it was not until the end of the 19th Century that Boltzmann was able to give a physical interpretation of entropy in terms of degree of order and probability. Now in the Carnot engine, we note tha ...
Thermodynamic (I) PE200 Assignment #6
... 1.A 0.5-m3 rigid tank contains refrigerant-134a initially at 160 kPa and 40 percent quality. Heat is now transferred to the refrigerant until the pressure reaches 700 kPa. Determine (a) the mass of the refrigerant in the tank and (b) the amount of heat transferred. Also, show the process on a P-v di ...
... 1.A 0.5-m3 rigid tank contains refrigerant-134a initially at 160 kPa and 40 percent quality. Heat is now transferred to the refrigerant until the pressure reaches 700 kPa. Determine (a) the mass of the refrigerant in the tank and (b) the amount of heat transferred. Also, show the process on a P-v di ...
PPT version
... held together by cohesive forces, different for different liquids. 2. The coefficients of thermal expansion vary a lot between liquids, and may depend on temperature in an extreme fashion. 3. Liquids freeze at low temperatures and boil at high temperature. So the ranges of operation of the liquid th ...
... held together by cohesive forces, different for different liquids. 2. The coefficients of thermal expansion vary a lot between liquids, and may depend on temperature in an extreme fashion. 3. Liquids freeze at low temperatures and boil at high temperature. So the ranges of operation of the liquid th ...
Document
... at a temperature of T0=3120C until it comes to thermal equilibrium. The cube is then dropped quickly into an insulated beaker(烧杯) containing a quantity of water of mass mw=220 g. The heat capacity of the beaker alone is Cb=190 J/K. Initially the water and the beaker are at a temperature of Ti=12.00c ...
... at a temperature of T0=3120C until it comes to thermal equilibrium. The cube is then dropped quickly into an insulated beaker(烧杯) containing a quantity of water of mass mw=220 g. The heat capacity of the beaker alone is Cb=190 J/K. Initially the water and the beaker are at a temperature of Ti=12.00c ...
Chapter 12 Slide
... environment during a constant pressure process. (a) Calculate the change in the internal energy of the gas. (b) If the internal energy drops by 4500 J and 7500 J is expelled from the system, find the change in volume , assuming a constant pressure of 1.01x105Pa ...
... environment during a constant pressure process. (a) Calculate the change in the internal energy of the gas. (b) If the internal energy drops by 4500 J and 7500 J is expelled from the system, find the change in volume , assuming a constant pressure of 1.01x105Pa ...
第四章理想气体的热力过程
... The amount of heat added to a closed system during a constant volume process equals to the increase in internal energy. ...
... The amount of heat added to a closed system during a constant volume process equals to the increase in internal energy. ...
v = Y
... ◦ Also, the temperature of the working substance must be the same as the cold reservoir when heat is discarded into it (TC). ◦ Any finite temperature drop would result in an irreversible processes. ◦ Every process that involves heat transfer must be isothermal. ◦ Any process in which the the working ...
... ◦ Also, the temperature of the working substance must be the same as the cold reservoir when heat is discarded into it (TC). ◦ Any finite temperature drop would result in an irreversible processes. ◦ Every process that involves heat transfer must be isothermal. ◦ Any process in which the the working ...
Equations of State Ideal Gas
... • the theoretical maximum amount of work that can be obtained from a system at a given state P1 and T1 when interacting with a reference atmosphere at the constant pressure and temperature P0 and T0 . • also referred to as “exergy”. The following observations can be made about availability: 1. Avail ...
... • the theoretical maximum amount of work that can be obtained from a system at a given state P1 and T1 when interacting with a reference atmosphere at the constant pressure and temperature P0 and T0 . • also referred to as “exergy”. The following observations can be made about availability: 1. Avail ...
4-Energy Analysis of Closed Systems
... • Heat is transferred in three ways: • Conduction is the transfer of energy from the more energetic particles of a substance to the adjacent less energetic ones as a result of interactions between the particles. • Convection is the mode of energy transfer between a solid surface and the adjacent ...
... • Heat is transferred in three ways: • Conduction is the transfer of energy from the more energetic particles of a substance to the adjacent less energetic ones as a result of interactions between the particles. • Convection is the mode of energy transfer between a solid surface and the adjacent ...