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A body cools from 70^@C to 60^@C in 10 ...

A body cools from `70^@C` to `60^@C` in 10 minutes. Calculate the temperature of body after further 7 minutes if temperature of surroundings is `12^@C` .

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To solve the problem of a body cooling from \(70^\circ C\) to \(60^\circ C\) in 10 minutes and then finding its temperature after a further 7 minutes with surroundings at \(12^\circ C\), we will apply Newton's Law of Cooling. ### Step-by-Step Solution: 1. **Understanding Newton's Law of Cooling**: Newton's Law of Cooling states that the rate of change of temperature of an object is proportional to the difference between its own temperature and the ambient temperature. The formula can be expressed as: \[ \frac{dT}{dt} = -k(T - T_s) ...
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MODERN PUBLICATION-THERMAL PROPERTIES OF MATTER-PRACTICE PROBLEM
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  8. An ice layer of thickness 3 cm is formed on a lake. How much time will...

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  9. A body cools from 70^@C to 60^@C in 10 minutes. Calculate the tempera...

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  10. A pan filled with hot food cools from 50^@C to 40^@C in 2 minutes and...

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  11. A body cools from 90^@C to 80^@C in 2 minutes. How long will it take ...

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  12. An electric heater is made up of 10 thin polished tubes of a metal. Ea...

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  13. The initial temperature of a black body is 527^@C. What should be its ...

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  14. An energy radiator at 0^@C is radiating energy at the rate of 2.2 xx ...

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  15. A hot body at 800^@C is radiating 500 J of energy per minute. Calcula...

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  16. The surface temperature of the hot body is 1127^(@)C find the waveleng...

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  18. The thermal emissivities of two bodies A and B are 0.02 and 0.09, resp...

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  19. Calculate the electrical energy consumed per second in an electric bul...

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  20. A sphere with radius 10 cm is radiating 500 W power at 700 K. Calculat...

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