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The sound travels from your mouth as sound waves.
The sound waves hit a hard surface (wall, cliff, building).
The waves are reflected back to your ears.
You hear the sound again after a short time – this is an echo.
13/01/2026
Practical demonstrations to concepts in physics, chemistry and other subjects tends to break-down and simplify understanding to it's ABC level for targeted students.
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Practical demonstration convection in water
It's a Monday morning, God we thank you for the gift of life and wellness. This first month of 2026 shall favour us greatly 🙏. Happy new week
Get the steps bit by bit
The size of metal increases due to rise in temperature.
The particles of the metal gain energy and vibrates vigorously.
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