Saturday, January 1, 2011

HOME ASSIGNMENT FOR CLASS XI IN PHYSICS DURING WINTER BREAK

What are the CGS and SI units of heat?
What are the two fixed points on a temperature scale?
Write the relation between temperatures on different scales.
Define coefficient of linear, superficial and cubical expansion.
Define the terms latent heat of fusion and latent heat of vaporization.
State the difference between vaporization and evaporation.
What do you understand by condensation and sublimation?
What are degrees of freedom?
State the law of equipartition of energy
Distinguish between isothermal and adiabatic process.
Define molar specific heat at constant pressure.
Distinguish between reversible process and irreversible process.
Explain steam line, ice line and hoar frost line with the help of Pressure and temperature graph.
Show that the coefficient of cubical expansion is equal to three times the coefficient of linear expansion.
Show that the coefficient of superficial expansion is equal to two times the coefficient of linear expansion.
State and explain the three modes of transference of heat.
Establish the adiabatic relation between P and T and between V and T.
What are the postulates of Kinetic theory of gases?
Derive an expression for the average kinetic energy of the molecule of gas.
Define isothermal process. Derive an expression for the work done during the process.
Derive an expression for the work done in one cycle during an adiabatic process
Describe the working of Carnot engine and derive its efficiency.
A heat engine with 100% efficiency is only a theoretical possibility. Explain.
State Newton’s law of cooling. Explain the experimental verification of Newton’s law of cooling.

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