Author: Abdul Wahab

  • Isotherms

    Isotherms

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    by

    Abdul Wahab
    in

    The temperature of a region is usually taken as a whole to find out how that area feels, e.g. hot or cold. However, the temperature in a region is not the same in every location of its covered area. It changes from point to point in a particular region. Generally, […]

  • Pen & Pencil

    Pen & Pencil

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    Abdul Wahab
    in

    Since prehistoric times, humans have tried to mark their stories and presence with the help of some tools. In ancient times, people used the techniques of engraving or etching their writings on hard surfaces like smooth stones, suitable flat wood, and some metallic surfaces. After that, materials like papyrus and […]

  • Paper

    Paper

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    Abdul Wahab
    in

    It is quite interesting to know the scenario of humans before paper. People used to write on various materials, such as wood, stones, leather, and leaves. For example, if they wanted to write on wood, they simply inscribe it with a sharp tool. Also, they used a kind of ink […]

  • Fire

    Fire

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    Abdul Wahab
    in

    It is very hard to imagine how humans used to live without the invention of fire. Before the fire, humans have only known about the heats of summer and colds of winter. So, without fire, no cooking, and one had to eat raw food and live life on cold nights. […]

  • Compass

    Compass

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    by

    Abdul Wahab
    in

    According to an old Greek tale, the effect of magnetism was seen by a shepherd accidentally. His name was Magnes and he lived in Magnesia, Greece. He had noticed that the nails of his shoes and the ferrule (cap) of his stick got stuck on a rock under his feet. […]