A copper overhead transmission line has a length of 60.0 m between its supports at 20°C. Determine the increase in length at 55°C if the coefficient of linear expansion of copper is 17 × 10-6 K-1
Energy transfer
The flow of energy from one region to another region is referred to as energy transfer. Since energy is quantitative; it must be transferred to a body or a material to work or to heat the system.
Molar Specific Heat
Heat capacity is the amount of heat energy absorbed or released by a chemical substance per the change in temperature of that substance. The change in heat is also called enthalpy. The SI unit of heat capacity is Joules per Kelvin, which is (J K-1)
Thermal Properties of Matter
Thermal energy is described as one of the form of heat energy which flows from one body of higher temperature to the other with the lower temperature when these two bodies are placed in contact to each other. Heat is described as the form of energy which is transferred between the two systems or in between the systems and their surrounding by the virtue of difference in temperature. Calorimetry is that branch of science which helps in measuring the changes which are taking place in the heat energy of a given body.
- A copper overhead transmission line has a length of 60.0 m between its supports at 20°C. Determine the increase in length at 55°C if the coefficient of linear expansion of copper is 17 × 10-6 K-1
- A car mass of 1200 kg accelerates up a road with a slope of 1 in 10, increasing its speed from 6 m/s to 20 m/s while travelling up the road a distance of 110 m against a frictional resistance of 1.5 kN calculate:
- The tractive effort between the driving wheels and the road surface
- The work done during the period of acceleration
- The average power developed
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