Per NCERT §7.6 eqn 7.15, for an altitude of h = 8 km above Earth (R_E = 6400 km), g decreases by approximately what fraction?
A2 %
B0.5 %
C1 %
D0.25 %
Answer & Solution
Correct answer: D. 0.25 %
NCERT §7.6: Δg/g ≈ 2h/R = 2×8/6400 = 1/400 = 0.25 %.
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