xxaurorabluexx
21.05.2021 •
Physics
The filament of a light bulb has a temperature of 2.5 x 103 °C and radiates 60 W of power. The emissivity of the filament is 0.69. Determine the filament's surface area.
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Ответ:
100 m
Explanation:
distance = speed x time
20×5 =100 m