A new temperature scale uses X as a unit of temperature, where the numerical value of the temperature tx in this scale is related to the absolute temperature T by tx = 3T + 300. If the specific heat of a material using this unit is 1400 J kg−1K−1 its specific heat in the S.1. system of units is :
4200Jkg−1K−1
1400Jkg−1K−1
466.7Jkg−1K−1
Impossible to determine from the information provided
A
4200Jkg−1K−1
B
466.7Jkg−1K−1
C
Impossible to determine from the information provided
D
1400Jkg−1K−1
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Solution
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tx=3T+300 δ(tx)=3 Thus, for every one degree change in the SI system, there is a 3 degree change in the new system. Hence, the specific heat in SI system= 1400*3= 4200J/kgK
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