• [Ended]Physics Tutoring Session on Heat Energy @ 4-5PM Today (Thur 25th Feb. 2016)

    Physics

    Chima Sunday (Tutor)
    25-02-2016 13:55:00 +0000

    Good day all,

    The concept of Heat Energy is the most fundamental in Thermal Physics, often tested in JAMB and other exams. so lets take a quick look into this topics. Welcome and enjoy your time.

    Heat Energy is a form of energy which flows due to temperature gradient. Heat makes us feel a sensation of hotness. Heat produced by the sun is called solar heat. Heat is used in many area of life, to mention but a few are cooking, drying, separating of metals from its ores etc. In this lecture we are going to review on the

    a) Thermal expansions in Solids
    -----Linear expansivity (α) = δL/(Loδθ)
    δL = change in length
    Lo = original length
    δθ = change in temperature

    -----Area Expansivity (β) = δA/(Aoδθ)
    δA = change in area
    Ao = original area
    δθ = change in temperature

    -----Cubic Expansivity (γ) = δV/(Voδθ)
    δV = change in volume
    Vo = original volume
    δθ = change in temperature

    Note that it can be shown that 3α = γ and 2α = β

    b) Expansion of Liquid
    -----Apparent Volume Expansivity
    -----Real Volume Expansivity

    c) Heat Transfer

    d) Anomalous Expansion of Water.

    Sit tight and enjoy your time, and please do come with your questions and writing materials. Once again WELCOME!

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