Question

Give reason for the following
1. Iron rims are heated red hot before fixing them on cart wheels
2. A new quilt is warmer than an old one​

Answer 1

Answer:

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Answer 2

Answer:

1. iron rim are heated red because by heating the iron Rim gets expanded and is easily fixed on cart wheels .

1. 2. a new quilt is warmer than old because the air which is trapped inside the cotton or woollen clothing acts as an insulator and does not allow the transfer for heat but in the older quilt air spacing in the cotton or wool gets compressed