Q.

If a thermometer reads freezing point of water as 20∘c and boiling point is 150∘c how much thermometer read, when the actual temperature is 60∘c

Moderate

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98∘c

110∘c

40∘c

60∘c

answer is 1.

(Detailed Solution Below)

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Detailed Solution

unknown thermometer , Lower Fixed point(LFP) = 200C; Upper Fixed Point (UFP)=1500C; actual reading given = 600C the formula that relates unknown thermometer and celsius thermometer is, Z-LFPUFP-LFP=C-LFPUFP-LFP celsius thermometer has LFP=00C and UFP=1000C substitute given values in above equation, x is reading on unknown thermometer x-20150-20=60-0100-0 x-20=78 x=98∘c

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