[phy] specific heat capacity 既單位

Specific heat capacity is defined as the heat required to raise the temperature of unit mass of a substance by 1 degree Celsius. The unit is therefore J/kg-C

Be aware that the defination refers to a CHANGE of temperature by 1 degree Celsius. Since a change of 1 degree on the Celsius scale is numerically equal to a change of 1 degree in the Kelvin scale, the unit for specific heat capacity can be equally written as J/kg-K