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Kusum Joshi

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  1. Asked: May 8, 2021In: Class 10 Science

    At noon the sun appears white as

    Kusum Joshi
    Added an answer on December 14, 2021 at 6:22 am

    [A] Light is least scattered. All we know that the Sun is directly over the head and sunlight travel relatively shorter distance causing only little of the blue and violet colours to be scattered.

    [A] Light is least scattered.
    All we know that the Sun is directly over the head and sunlight travel relatively shorter distance causing only little of the blue and violet colours to be scattered.

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  2. Asked: May 5, 2021In: Class 10 Science

    Which of the following phenomena contributes significantly to the reddish appearance of the sun at sunrise or sunset?

    Kusum Joshi
    Added an answer on December 14, 2021 at 6:21 am

    [B] Scattering of light Red colour scatters the least so that it travels the farthest. During sunset or sunrise, light has to travel a longer distance to reach us. The sky appears reddish as when only red light reaches to us. Hence, you should go with the option [B].

    [B] Scattering of light
    Red colour scatters the least so that it travels the farthest. During sunset or sunrise, light has to travel a longer distance to reach us. The sky appears reddish as when only red light reaches to us. Hence, you should go with the option [B].

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  3. Asked: June 9, 2021In: Class 10 Science

    Alloys are homogeneous mixtures of a metal with a metal or non-metal. Which among the following alloys contain non-metal as one of its constituents ?

    Kusum Joshi
    Added an answer on December 7, 2021 at 9:36 am

    [D] Steel We know that steel is an alloy of iron and carbon. Mixing of carbon gives strength to iron. Your answer will be option [D].

    [D] Steel
    We know that steel is an alloy of iron and carbon. Mixing of carbon gives strength to iron. Your answer will be option [D].

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  4. Asked: May 27, 2021In: Class 9 Science

    Animal cell lacking nuclei would also lack in

    Kusum Joshi
    Added an answer on November 24, 2021 at 11:49 am

    [A] chromosomes Animal cells lacking nuclei would also lack in chromosomes because chromosomes are present in nucleus only.

    [A] chromosomes
    Animal cells lacking nuclei would also lack in chromosomes because chromosomes are present in nucleus only.

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