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  1. Mathematical Operations and Foundational Constraints
    by Dr. Osama M. Khaled — published May 23, 2026 — last modified May 23, 2026 08:55 AM — filed under: Year 7, Year 8
    Negative Numbers and Division by Zero
    Located in Mathematics / Calculus / From Arithmetic to Algebra
  2. The Moon and Gravity
    by Dr. Osama M. Khaled — published Mar 27, 2024 — last modified Jul 13, 2024 12:44 PM — filed under: Year 7
    The moon is 240,000 miles from earth-center, or 60 times as far as we are from center
    Located in Physics / Gravity
  3. Weightlessness
    by Dr. Osama M. Khaled — published Mar 31, 2024 — last modified Jul 13, 2024 12:51 PM — filed under: Year 7
    Heavy and light objects fall at the same rate !!
    Located in Physics / Gravity
  4. Calculations
    by Dr. Osama M. Khaled — published Apr 01, 2024 — last modified Jul 13, 2024 12:53 PM — filed under: Year 7
    The law of gravity included a symbol for proportionality. In order to use this relationship for solving problems, we must remove the proportionality by ...
    Located in Physics / Gravity
  5. Density
    by Dr. Osama M. Khaled — published Jul 25, 2024 — last modified Aug 11, 2024 02:26 AM — filed under: Year 7, Year 8
    Solids differ in many ways, including color, texture, and elasticity. Another important distinguishing property of solids is density
    Located in Physics / Solids
  6. Pressure in a liquid
    by Dr. Osama M. Khaled — published Jul 16, 2025 — last modified Jul 19, 2025 10:28 PM — filed under: Year 7, Year 8
    Pressure in a liquid increases with depth below the surface
    Located in Physics / Liquids and Gases
  7. Buoyancy
    by Dr. Osama M. Khaled — published Jul 23, 2025 — last modified May 18, 2026 09:36 PM — filed under: Year 7
    An object in a fluid is buoyed up by a force equal to the weight of the fluid displaced
    Located in Physics / Liquids and Gases
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