Q. The dense feathers and a layer of fat under the skin allows the penguins to withstand temperatures below

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Q. The heating coil of the electric kettle is always placed at the kettle's

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Q. To help plants grow better by trapping heat in cold climates, we use

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Q. Due to good insulator property, to cover ice blocks, we use

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Q. The shiny surfaces are

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Q. Double-glazed windows have air trapped between two panes of glass, which reduce

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Q. Soldering iron rods are made of iron with the tip made of

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Q. During boiling, temperature remains constant at the

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Q. During condensation temperature remains constant at the

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Q. The boiling point of mercury is

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Q. The reverse process of boiling is termed as

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Q. A typical graph of temperature against time is called the

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Q. When a pure liquid is heated and it changes to vapor at a fixed temperature, the state is called

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Q. The particular temperature at which the pure liquid is heated and it changes to vapor is known as

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Q. The change of state from vapor to liquid when a substance is cooled at the same constant temperature as in boiling is known as

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Q. In a meter rule, when the pivot is at the 50 cm mark, the ruler is

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Q. The center of gravity of an object depends on the distribution of its

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Q. If we place the pivot at a special position, its weight causes

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Q. The center of gravity of an object is usually located in the region where

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Q. When the object is pivoted at a corner, its weight causes

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