⚡ Quick Reference

📐 Mathematics Formulas

Quadratic Formula:

x = (-b ± √(b² - 4ac)) / 2a

Pythagorean Theorem:

a² + b² = c²

Slope:

m = (y₂ - y₁) / (x₂ - x₁)

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⚛️ Physics Constants

Speed of Light: 3 × 10⁸ m/s

Gravity (g): 9.8 m/s²

Planck's Constant: 6.626 × 10⁻³⁴ J·s

Avogadro's Number: 6.022 × 10²³

Boltzmann Constant: 1.38 × 10⁻²³ J/K

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🧪 Chemistry Periodic Table

Atomic #1: Hydrogen (H)

Atomic #6: Carbon (C)

Atomic #8: Oxygen (O)

Atomic #26: Iron (Fe)

Atomic #79: Gold (Au)

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🇫🇷 French Grammar Quick Guide

Present Tense - "Je" form:

• Être: suis
• Avoir: ai
• Aller: vais
• Faire: fais

Common Prepositions: à, de, en, pour, avec, sans

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🇸🇦 Arabic Alphabet Reference

Arabic Letters (28 total):

ا ب ت ث ج ح خ د ذ ر ز س ش ص ض ط ظ ع غ ف ق ك ل م ن ه و ي

Writing direction: Right to left

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