Earth as a System : Energy, Matter, and Life
CBSE · Class 9 · Science
All formulas from Earth as a System : Energy, Matter, and Life in CBSE Class 9 Science. Key equations, constants, and identities for board exam preparation.
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Formulas
Solar Radiation and Insolation
E = Intensity × area × time
Solar constant ≈ 1.4 kW/m²
Example 13.1: E = 1 × 1000 J s⁻¹ m⁻² × 1 m² × 3600 s
Example 13.1 result: E = 3.6 × 10^6 J
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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