Physics, asked by Anonymous, 1 year ago

solve 3rd question please

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Answered by imsimran0
2
sorry for bad handwriting

(b) use m2 in roh = mass / volume and volume =4/3 pi (r)3
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Answered by kvnmurty
1
Qn 3.   G = 6.67 *10⁻¹¹ Nm²/kg².    R = 6.4 * 10⁶ m.   g = 9.8 m/s²

We know from Newton's Gravitational law:

            g = G M / R²
     =>   M = g R² / G = 9.8 * 6.4² * 10¹² /6.67*10⁻¹¹  Kg = 6.018 * 10²⁴ Kg

           density = d = M / [4 π R³ /3 ] = 5,480.6 Kg /m³
           Substitute the values and calculate the answer.


kvnmurty: :-) :-)
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