how will you show that substance expand on heating and contract on cooling
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if you observe railway tracks, you will see during summers; when it is very hot the tracks expand ie. they become large. during winters; when it is very cold the tracks contract ie. they become small.
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if u observe the following angles and 58th are you and I will call u later this month in Hyderabad to the meeting of children's day so we r not being any one to care about the how many seconds are there in the Hyderabad and when the bus stop now that number is the mountains of Himalayas residual value to come school so please grant and leave for the father birthday ra bro live
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