Diameter of a brass disc at 30^(@)C is 1...

Diameter of a brass disc at `30^(@)C` is 10 cm. What will be the increase in area of the disc at `70^(@)C`? `alpha` for brass `=18 times 10^(-6@)C^(-1)`.

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The correct Answer is:

0.113 `cm^(2)`

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At 30^(@)C the diameter of a brass disc is 8 cm. What will be the increase in surface area if it is heated to 80^(@)C ? alpha of brass =18 times 10^(-6@)C^(-1) .

A steel is 1.5 m long at 20^(@)C . What will be the increase in its length if it is heated up to 100^(@)C?" "alpha for steel =11 times 10^(-6@)C^(-1) .

Due to rise in temperature of a brass rod by 100^(@)C , its length increases by 0.5 cm. What was the initial length of the rod? alpha for brass =19 times 10^(-6@)C^(-1) .

A barometer with a brass scale reads 75.34 cm at 25^(@)C . The scale was graduated at 20^(@)C. What will be the reading of the barometer at 0^(@)C ? Coefficient of linear expansion alpha for brass =18 times 10^(-6@)C^(-1) and coefficient of linear expansion gamma for mercury =18 times 10^(-5@)C^(-1).

The coefficient of apparent expansion of a liquid in a brass vessel is 14.6 times 10^(-5@)C^(-1) . What will be the coefficient of apparent expansion of that liquid when it is in iron vessel? alpha for brass =18 times 10^(-6@)C^(-1) " and " alpha for iron =12 times 10^(-6@)C^(-1) .

A brass rod has a length of 150 cm at 40^(@)C . What will be its length at 100^(@)C ? The coefficient of linear expansion of brass is 18 times 10^(-6@)C^(-1) .

Two metaliic strips of different metals are riveted together to form a composite metallic strip of thickness 0.1 cm. If the strip is heated to 100^(@)C , what will be the radius of curvature of the strip? Given, the values of alpha of the two metals are 18 times 10^(-6@)C^(-1) " and " 12 times 10^(-6@)C^(-1) .

The difference in lengths of an iron and a copper rod, both at 50^(@)C " and " 450^(@)C , is 2 cm. What are the lengths of the two rods at 0^(@)C ? [Given, alpha_(Fe)=12 times 10^(-6@)C^(-1) " and " alpha_(Cu)=17 times 10^(-6@)C^(-1) ]

A square metal plate of side 100 cm at 0^(@)C , has a circular hole of diameter 40 cm in the middle of it. At what temperature, will each side by 101 cm long? What will be the diameter of the hole at that temperature? alpha for the metal =12.5 times 10^(-6@)C^(-1)

CHHAYA PUBLICATION-EXPANSION OF SOLIDS AND LIQUIDS-EXERCISE - PROBLEM SET - I

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