Physics-
General
Easy

Question

If a faulty thermometer reads the melting point of ice as –10°C and it reads 60°C in place of 50°C, the temperature of boiling point of water on this scale is ...

  1. 100°C    
  2. 110°C    
  3. 120°C    
  4. 130°C    

hintHint:

fraction numerator X minus L over denominator U minus L end fraction equals fraction numerator C over denominator 100 end fraction

The correct answer is: 130°C


    fraction numerator X minus L over denominator U minus L end fraction equals fraction numerator C over denominator 100 end fraction
    Here X = 60degreeC, C = 50degreeC, L = –10degreeC
    therefore fraction numerator 60 minus open parentheses negative 10 close parentheses over denominator U minus open parentheses negative 10 close parentheses end fraction equals fraction numerator 50 over denominator 100 end fraction
    fraction numerator 70 over denominator U plus 10 end fraction equals fraction numerator 1 over denominator 2 end fraction
    U +10 =140
    U equals 140 minus 10 equals 130 to the power of ring operator end exponent C

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