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5. Give reasons.

a. Wood is an example of bio-fuel.

b. People prefer white clothes in summer and black clothes in winter.

c. A jammed stopper of a bottle is dipped into hot water.


Sagot :

Final answer:

Explanation of wood as biofuel, color choice based on heat absorption, and bottle stopper loosening in hot water.


Explanation:

Wood is considered an example of biofuel because it is a renewable resource that can be burned directly for heat energy or processed into biofuel, which can be used in various applications including vehicles.

People prefer white clothes in summer and black clothes in winter due to how these colors interact with sunlight and heat absorption, with white reflecting light and heat while black absorbs it, helping to regulate body temperature accordingly.

When the jammed stopper of a bottle is dipped into hot water, the heat causes the material around the stopper to expand, making it easier to remove the stopper without damaging the bottle.


Learn more about Biofuels, color absorption, expansion with heat here:

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