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A glass window is to be fitted in an aluminium frame.The temperature on the working day is 40 degree C & the glass window measures exactly 20cm*30cm. What should be the size of the aluminium frame so that there is no stress on the glass in winter even if the temperature drops to 0 degrees C? Coefficients of linear expansion of glass & aluminium are 0.000009 & 0.000024 respectively.


A glass window is to be fitted in an aluminium frame.The temperature on the working day is 40 degree C & the glass window measures exactly 20cm*30cm. What should be the size of the aluminium frame so that there is no stress on the glass in winter even if the temperature drops to 0 degrees C?        Coefficients of linear expansion of glass & aluminium are 0.000009 &  0.000024 respectively.  


Grade:11

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