National Science Olympiad Forum By SOF Olympiad Trainer - Page 36

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Subject :NSO    Class : Class 6

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Class : Class 6

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Subject :NSO    Class : Class 4

Nidhi knocked three metal thumbtacks into the middle section of a block of wood and covered this section with a piece of white paper. Then, she brought a lighted candle near this section.
After few seconds, she removed the lighted candle and found burn marks on the paper except on the areas where the thumbtacks were present. Which of the following best explains this observation?


AThe paper was a good conductor of heat.
BThe thumbtacks and the paper had different temperatures.
CSome parts of the wood absorbed the heat from the candle flame.
DThe thumbtacks conducted heat away quickly before the paper could get burnt.


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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 9

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Subject :NSO    Class : Class 9

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Class : Class 9

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Subject :NSO    Class : Class 9

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Class : Class 9
w1 should be greater than w2 because they are increasing R(distance) SO it should be Option C

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Subject :NSO    Class : Class 9

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Subject :NSO    Class : Class 9

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Class : Class 9
isnt pinus also a bryophyte?

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