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Sabtu, 24 November 2012

DEFINE OF HEAT

Heat always refers to the transfer of energy between system and bodies, 
not to energy contained within the system. 
For example, the iron is hot, so its we reasonable to say it must have a lot of heat in it.
Is it wrong. Because it will cause that energy to transfer to your hand, in the form of heat.
Heat was formerly thought to be an invisible weightless fluid called caloric, which was produced when a substance burned and which could be transmitted by conduction from one body to another.
Quantity of Heat. The quantity of heat transferred in a process is measured by some changes which accompanies the process.
Heat capacities are ordinarily expressed in calories per celcius degree.
the specific heat capacity of material is numerically equal to the quantity of heat which must be supplied to unit mass of the material to increase its temperature through 1 degree.
So, what do you think about Heat???
Please leave a comment.. :D


Referensi :


sears and zemansky.1960.college physics.Tokyo:Japan Publication Trading Company, ltd

7 komentar:

  1. I think heat is the energy that moves due to temperature differences.
    such as heat moves from the high temperature region to low temperature region

    BalasHapus
  2. I think the heat is the transfer of energy from the substance or object to the high-temperature objects or substances that lower temperature. people used to call hot as heat. and the transfer of heat energy is also composed of three kinds, namely conduction, convection and radiation. that's what I think about the heat.

    BalasHapus
  3. i think heat is energy that can be transferred, from a high temperature to lower temperature.

    BalasHapus
  4. very good ...
    why the change in temperature depends on the heat capacity ....?????

    BalasHapus
    Balasan
    1. thanks for your question.
      i think heat is propotional with heat capacity, if the heat increase so the temperature is high, and if the heat decrease so the temperature is low.

      Hapus
  5. can u give me the example of transferred of energy?
    thanks

    BalasHapus
    Balasan
    1. ok.for example when you drop a table you need energy to drop, and when you finish droping, the energy not lost but move to table.
      or when you lift up a rock, you are changing chemical energy of the food you have eateninto muscle energy.

      Hapus