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Comparison between work and heat - thermodynamics:
There are a number of similarities between heat and work.
1. Both heat and work are transient phenomena. The systems do not have heat or work. When a system undergoes some change, heat transfer or work done can occur.
2. The heat and work are boundary phenomena. They are normally observed at the boundary of system.
3. The heat and work signify energy crossing boundary of the system.
4. The heat and work are path functions and hence they are inexact differentials.
5. Heat and work are not properties of the system.
6. Heat transfer is energy interaction because of temperature difference only. All other energy interactions can be called as work transfer.
7. The magnitude of heat transfer or work transfer depends on the path followed by system during change of state.
Discuss relative demerits and merits of belt, rope and chain drive for transmission of power and find the condition for transmitting the maximum power in a flat belt drive.
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Transformation Hardening The main features of the laser as a heat source for transformation hardening are: (A) Clean energy source. (B) Energy is localised: no heat spillage.
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specifications of lathe.
Diamond Crossing: Two tracks crossing one another is known as a diamond crossing. The component of a Diamond Crossing are indicated in Figure. Figure: Diamond Cross
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