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If R is the radius of the earth and g is the acceleration due to gravity on the earth surface, the mean density of the earth is
Options
(a) 4πG/3gR
(b) 3πG/4gR
(c) 3g/4πRG
(d)πRg/12G
Correct Answer:
3g/4πRG
Explanation:
Density = Mass/ Volume
= M / (4/3 π R³)
= (gR² / G). x 3/4 (1/π R³) [as g = GM/R²]
= (3/4π G) x (g/R)
=3g/4πRG
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Question Type: Apply
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A conveyor belt is moving at a constant speed of 2 m/s. A box is gently dropped on it
- A ball is thrown vertically downwards from a height of 20 m with an initially
- For transistor action (1) Base, emitter and collector regions should have similar size
- A rocket with a lift-off mass 3.5 x 10⁴ kg is blasted upwards with an initial acceleration
- The fundamental frequency of a closed organ pipe of length 20 cm is equal to the second
Question Type: Apply (15)
Difficulty Level: Easy (1008)
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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