Q281
Open questionA small gap is left at the joints of rails in a railway track to
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Q282
Open questionPipelines in cold countries often burst in winter, because
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Q283
Open questionIn severe winter, in cold countries water pipes burst because
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Q284
Open questionRailway tracks are banked on curves so that
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Q285
Open questionThe density of the liquid when heated
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Q286
Open questionThermocouple consists of
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Q287
Open questionWater has maximum density at
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Q288
Open questionWhen water freezes its density
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Q289
Open questionWhich of the following are methods of heat transfer?
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Q290
Open questionHeat energy is transferred by conduction whenever molecules
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Q291
Open questionWhy does ice covered in sawdust not melt quickly ?
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Q292
Open questionIce is packed in saw dust because
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Q293
Open questionIn general, which is the cause of a sea breeze?
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Q294
Open questionOutside of cooking utensils are generally left black from below because
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Q295
Open questionHeat transfer by radiation mainly depends upon
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Q296
Open questionA white and smooth surface is
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Q297
Open questionThe atmosphere is heated mainly by
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Q298
Open questionThe direction of heat flow between two objects depends on
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Q299
Open questionWoollen cloth protects the body from cold because
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Q300
Open questionHot water is poured simultaneously in four metallic tumblers painted outside with different paints. After some time the water will be found to have cooled most in the tumbler painted.
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