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  1. 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
  2. Specific Gravity
    by Dr. Osama M. Khaled — published Aug 14, 2024 — last modified Aug 17, 2024 04:20 AM — filed under: Year 8, Year 9, Year 10
    The specific gravity of a substance is often listed in tables instead of either mass density or weight density
    Located in Physics / Solids
  3. Pressure
    by Dr. Osama M. Khaled — published Sep 09, 2024 — last modified Sep 09, 2024 08:38 PM — filed under: Year 8, Year 11, Year 12
    Pressure is the force divided by the area over which the force is applied
    Located in Physics / Solids
  4. 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
  5. Multiply two integers that have different signs
    by Dr. Osama M. Khaled — published Apr 29, 2026 — last modified Apr 29, 2026 08:57 PM — filed under: Year 8
    To multiply a positive integer and a negative integer,multiply their absolute values.Then make the final answer negative.
    Located in Mathematics / … / Integers / Multiplying Integers
  6. Multiply two integers that have the same sign
    by Dr. Osama M. Khaled — published Apr 30, 2026 — last modified Apr 30, 2026 09:09 PM — filed under: Year 8
    To multiply two integers that have the same sign,multiply their absolute values.The final answer is positive.
    Located in Mathematics / … / Integers / Multiplying Integers
  7. Perform several multiplications to evaluate expressions
    by Dr. Osama M. Khaled — published May 02, 2026 — last modified May 05, 2026 08:05 AM — filed under: Year 8
    To evaluate expressions that contain several multiplications,we make repeated use of the rules for multiplying two integers.
    Located in Mathematics / … / Integers / Multiplying Integers
  8. Evaluate exponential expressions that have negative bases
    by Dr. Osama M. Khaled — published May 04, 2026 — last modified May 05, 2026 08:06 AM — filed under: Year 8
    We evaluate exponential expressions with bases that are negative numbers.
    Located in Mathematics / … / Integers / Multiplying Integers
  9. Solve application problems by multiplying integers
    by Dr. Osama M. Khaled — published May 05, 2026 — last modified May 05, 2026 08:23 AM — filed under: Year 8
    Problems that involve repeated addition are often more easily solved using multiplication.
    Located in Mathematics / … / Integers / Multiplying Integers
  10. Divide two integers
    by Dr. Osama M. Khaled — published May 05, 2026 — last modified May 05, 2026 10:44 AM — filed under: Year 8
    To divide two integers,divide their absolute values
    Located in Mathematics / … / Integers / Dividing Integers
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