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Physics / Heat

Physics / Heat

""you wrap up in blankets in the winter, hold your hands out to feel the warmth of a fire, and jump when touch any hot object""What is this thing which you call as heat?Heat is form of energy . Greater the heat energy content, hotter will be the body.
Heat is transferred from a body at a higher temperature to a body at lower temperature.The effects of heat on an object are
*Change in temperature of a body,Change in shape of a body,Change of state of matter. Conduction, convection, and radiation are the different methods of heat transfer.Conduction- It is a process of heat transfer from hot end to cold end from particle to particle of medium without actual movement of particles.Convection-It is a process of heat transfer by actual movement of the medium particles.Radiation- It is a process of heat transfer in which heat directly passes from one body to other body without affecting the medium. These are invisible electromagnetic waves responsible for heat transfer by radiation .Find out whether conduction,convection and radiation is possible through vaccum.Heat passes easily through heat conductors. Heat does not pass easily through insulators. Dark colored objects more easily absorb heat through radiation.

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Exercises
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  • Heat - SmartTest

    A SmartTest on Heat

    • Accessed by: 244 Students
    • Average Time: 00:06:47
    • Average Score: 68.33
    • Questions: 23
    • Introduction to heat
    • Thermal expansion in solids
    • Thermal expansions in liquids
    • Anamalous expansion of water
    • Temperatute and different scales of temperature
    • Heat review
  • Heat -- Summary

    Learnhive Lesson on Heat

    • Accessed by: 211 Students

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