Subject :NSO Class : Class 4
Subject :NSO Class : Class 7
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Subject :NSO Class : Class 7
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Subject :NSO Class : Class 7
Ans 6:
Class : Class 9
I think I can explain this. We know it has to be a metal bowl so that it conducts the heat from the milk. Now, if we have a thinner bowl, the conducted heat can be transferred to the air faster and more efficiently. That's why I think the answer is c and not d.
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Subject :NSO Class : Class 7
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Subject :NSO Class : Class 7
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Subject :NSO Class : Class 5
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Subject :NSO Class : Class 7
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Subject :NSO Class : Class 4
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Subject :NSO Class : Class 7
Observe the given figure carefully and choose the correct option for matching the column I with column II.
Column I | Column II |
(A)X | (i) The process of transfer of heat in a liquid or a gas by the movement of liquid or gas. |
(B)Y | (ii) The flow of heat through a substance without the movement of the substance itself. |
(C)Z | (iii) The process by which heat travels without the help of material medium. |
A (A)-(iii), (B)-(i), (C)-(ii)
B (A)-(ii), (B)-(iii), (C)-(i)
C (A)-(i), (B)-(ii), (C)-(iii)
D (A)-(ii), (B)-(i), (C)-(iii)
Ans 3:
Class : Class 8
i think the answer is A as the process X is of radiation and process Y is convection and process Z is conduction .
a medium is not required in radiation .
convection takes place in fluids .
that is why i think the answer is option A