Per NCERT §1.3, the diameter of Earth ≈ 1.28 × 10⁷ m has order of magnitude equal to which value?
A10
B8
C7
D6
Answer & Solution
Correct answer: C. 7
NCERT §1.3: a = 1.28 ≤ 5, so round down → 10⁷ m. Order of magnitude = exponent = 7.
Related questions
Per NCERT §1.3, the digit 0 conventionally placed to the LEFT of the decimal in numbers < Per NCERT §1.3 rule, exact integers (like 2 in s = 2πr or n in T = t/n) have how many signPer NCERT §1.3, the diameter of a hydrogen atom (≈ 1.06 × 10⁻¹⁰ m) has order of magnitude Per NCERT §1.3 (scientific notation), in the form a × 10ᵇ all zeros appearing in the base Per NCERT §1.3, the number 4 700 m written WITHOUT a decimal has how many significant figuPer NCERT §1.3, the number of significant figures in 6.320 J (NCERT Ex 1.10d) is which?Per NCERT §1.3, in a number WITH a decimal point, TRAILING zeros are which?Per NCERT §1.3, the number of significant figures in 0.007 m² is which?