The cooling fins at the back of refrigerator are made of black and rough surface because ____?
ریفریجریٹر کے پچھلے حصے میں کولنگ فین سیاہ اور کھردری سطح سے بنے ہیں کیونکہ ____؟
Answer: They are good radiators of heat
Explanation
The cooling fins at the back of a refrigerator are typically made of a black, rough surface to maximize heat radiation. This design:
- Increases the surface area for heat transfer
- Absorbs heat from the surrounding air
- Emits heat more efficiently due to the rough surface
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EVERYDAY SCIENCE (2 times)
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