A planet has a diameter and average density twice that of the earth. The acceleration due to its gravity on surface will be
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Explanation:
Radius. of earth =r
Radius of a planet=2r
density =mass/volume
=M/4/3*πr^3= density of earth
density of new planet=M/4/3*π8r^3
mass of new planet= 16 M
gravity=16MG/4r^2
=4g
= 39.2 m/ s^2
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