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Perspectivelysci
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    How does the heat transfer through the rod?

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  • 2. 

    What kind of gas that ignites glowing splinter?

    • Oxygen

    • Carbon Dioxide

    • Nitrogen

    • Hydrogen

    Correct Answer
    A. Oxygen
    Explanation
    Oxygen is the correct answer because it is a highly reactive gas that supports combustion. When a glowing splinter is introduced to oxygen, it reacts with the oxygen molecules, causing the splinter to ignite and produce a flame. Carbon dioxide, nitrogen, and hydrogen do not support combustion in the same way that oxygen does, so they would not cause the splinter to ignite.

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  • 3. 

    What is the name after Iron combined with Sulphur?

    Correct Answer
    Iron Sulphide
    Explanation
    When Iron combines with Sulphur, the resulting compound is called Iron Sulphide. This compound is formed through a chemical reaction between Iron and Sulphur atoms, where the Iron atoms bond with the Sulphur atoms to create a new substance with its own unique properties. Iron Sulphide is commonly found in nature as the mineral pyrite and is also used in various industrial applications.

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  • 4. 

    What is the most accurate percentage of Oxygen?

    Correct Answer
    21% , 21
    Explanation
    The most accurate percentage of oxygen is 21%. This is because oxygen makes up approximately 21% of the Earth's atmosphere. It is an essential element for many living organisms and plays a crucial role in various biological and chemical processes.

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  • 5. 

    Why the thumbtack will fall through different time?

    Correct Answer
    Wax has been melted
    Explanation
    The thumbtack will fall through different times because the wax that was holding it in place has been melted. When the wax is solid, it provides a strong hold for the thumbtack, preventing it from falling. However, when the wax is melted, it loses its adhesive properties, causing the thumbtack to no longer be securely held in place. As a result, the thumbtack will fall through at different times depending on when the wax was melted and how long it takes for gravity to overcome any remaining friction or resistance.

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  • Oct 22, 2024
    Quiz Edited by
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  • Oct 29, 2009
    Quiz Created by
    Perspectivelysci

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