Question

* Explain giving scientific reason.

(1) Metalic utensils are used for cooking.

(2) Ice is kept in sawdust. (wood dust)​

Answer 1

Answer:

1- so that heat transfer more faster cooking can be done in less time

2- so ice will not melt The saw dust acts as an insulator and does not pass the surrounding heat to ice and thus prevents it from melting. This is the reason why ice is kept in saw dust, or it may melt. Because a lot of air is trapped in between the sawdust particles, as air is a bad conductor of heat.

Explanation:

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Answer 2

Answer:

1. It is because metals conduct heat very quickly. This is the only reason. To do cooking in less time metals are used. Aluminium is often used as cooking utensils as the coefficient of thermal expansion is very high as well as it conducts more heat.

2. The saw dust acts as an insulator and does not pass the surrounding heat to ice and thus prevents it from melting. This is the reason why ice is kept in saw dust, or it may melt. Because a lot of air is trapped in between the sawdust particles, as air is a bad conductor of heat.

Explanation:

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