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Fill in the blanks about the internal structure of a chloroplast.

by Dr. Osama M. Khaled — published Jun 15, 2026 Located in Biology / Cell Structure / Chloroplasts and Photosynthesis Organelles

Vacuoles and Cell Sap

by Dr. Osama M. Khaled — published Jun 15, 2026 — last modified Jun 15, 2026 09:26 PM — filed under: Year 8, Year 11, Year 12

Focuses on plant vacuoles (tonoplast, cell sap, hyperosmotic conditions), contractile vacuoles in single-celled organisms, and the role of vacuoles in storing ...

Located in Biology / Cell Structure

How does a perfectly elastic collision differ from an inelastic collision?

by Dr. Osama M. Khaled — published Aug 07, 2023 — last modified Jul 03, 2025 12:29 PM Located in Physics / Momentum and Energy Conservation / Conservation of momentum and energy: Self Test

Lifting a 5-kg object 3 meters requires how much energy?

by Dr. Osama M. Khaled — published Aug 07, 2023 — last modified Aug 08, 2023 01:06 AM Located in Physics / Momentum and Energy Conservation / Conservation of momentum and energy: Self Test

what is the power of the lifter if it requires 147 joules to lift an object above the ground for 2 seconds?

by Dr. Osama M. Khaled — published Aug 07, 2023 — last modified Aug 08, 2023 01:14 AM Located in Physics / Momentum and Energy Conservation / Conservation of momentum and energy: Self Test

An object is going 10 m/s when it hits the ground.

by Dr. Osama M. Khaled — published Aug 07, 2023 — last modified Aug 08, 2023 01:31 AM Located in Physics / Momentum and Energy Conservation / Conservation of momentum and energy: Self Test

Gravity

by Dr. Osama M. Khaled — published Mar 20, 2024 — last modified May 30, 2024 11:15 AM

The law of gravitation plays a very prominent role in our view of the universe

Located in Physics

$Gravity$

The Law of Gravity

by Dr. Osama M. Khaled — published Mar 20, 2024 — last modified Jul 13, 2024 01:04 PM — filed under: Year 10

Learn how gravity keeps the universe in balance

Located in Physics / Gravity

Newton's law of gravity

by Dr. Osama M. Khaled — published Mar 20, 2024 Located in Physics / Gravity / The Law of Gravity

Choose the correct formula of Newton's law of gravity

by Dr. Osama M. Khaled — published Mar 20, 2024 — last modified Mar 20, 2024 09:13 PM Located in Physics / Gravity / The Law of Gravity

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