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10th Physics Numerical Problems have been uploaded...      9th Physics Numerical Problems and Shotr Questions have been uploaded...



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UNIT 9 NUMERICALS
UNIT 9:

Transfer of Heat...
Numerical Problems...

Numerical No: 9.1,9.2

    NUMERICAL NO: 9.1

  • The concrete roof of a house of thickness 20 cm has an area of 200 m2. The temperature inside the house is 15oC and the outside is 35oC. Find the rate at which thermal energy will be conducted through roof . The value of K for concrete is 0.65 Wm-1 K-1.


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    NUMERICAL NO: 9.2

  • How much heat is lost in an hour through a glass window measuring 2.0 m by 2.5 m when inside temperature is 25oC and that of outside is 5oC, theckness of glass is 0.8 cm and the value of k for glass is 0.8 Wm-1 K-1.


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