NCERT Exemplar VIII — task. Science CBSE, Class 9.

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எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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1. The weight of an object at the centre of the earth of radius \(R\) is

\(zero\)
\(\frac{1}{R^2}\) times the weight at surface of the earth
\(infinite\)
\(R\) times the weight at the surface of the earth

2. An object weighs \(10\ N\) in air. When immersed fully in water, it weighs only \(8\ N\). The weight of the liquid displaced by the object will be

\(8\ N\)
\(2\ N\)
\(12\ N\)
\(10\ N\)

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