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A centigrade and a Fahrenheit thermomete...

A centigrade and a Fahrenheit thermometer are dipped in boiling water. The water temperature is lowered until the Fahrenheit thermometer registered at `140°F`. What is the fall in temperature as registered by the centigrade thermometer ?

A

`80^(@)`

B

`60^(@)`

C

`40^(@)`

D

`30^(@)`

Text Solution

Verified by Experts

The correct Answer is:
c
`(DeltaC)/(5)=(DeltaF)/(9)rArr DeltaC =(5)/(9)DeltaF=(5)/(9)DeltaF=(5)/(9)(212-140)rArr DeltaC=40^(@)C`
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FULL MARKS-HEAT AND THERMODYNAMICS-ADDITIONAL QUESTIONS SOLVED (I. Choose the correct answer from the following)
  1. At a given volume and temperature, the pressure of a gas ……….. .

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  2. Oxygen boils at -183^(@)C. This temperature in Fahrenheit scale is ……....

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  3. A centigrade and a Fahrenheit thermometer are dipped in boiling water....

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  4. The change in temperature of a body is 50^(@)C. The change on the kelv...

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  5. Mercury themometers can be used to measure temperature up to ……………… .

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  6. For an ideal gas

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  7. Device used to measure very high temperature is ……………….. .

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  8. Two metal rods A and B are having their initial lengths in the ratio 2...

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  9. Boyles' law is applicable in ……………. .

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  10. A rod, when heated from 0^(@)C to 50^(@)C, expands by 1.0 mm. Another ...

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  11. A container contains hydrogen gas at pressure P and temperature T. Ano...

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  12. Density of water is maximum at the temperature of ………………. .

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  13. The equation of state for 5g of oxygen at a pressure P and tem...

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  14. In the given diagram theta is …………

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  15. In ideal gas is expanding such that PT^(2) = constant. The coefficient...

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  16. A metallic solid sphere is rotating about its diameter as axis of rota...

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  17. The difference between volume and pressure coefficients of an ideal ga...

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  18. Which of the following instruments is used in the measurement of tempe...

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  19. At 0^(@)C, Pressure measured by barometer is 760 mm. What will be the ...

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  20. The temperature on the new scale, corresponding to a temperature of 39...

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