A two-dimensional transient temperature field can be represented as the following mathematical expression: t=f(x,y) t=f(x,y,z,t) t=f(x,t) t=f(x,y,t) t=f(x,y,z)

The correct mathematical expression for representing a two-dimensional transient temperature field is: This expression indicates that the temperature is a function of the spatial coordinates and , as well as the time coordinate . In a two-dimensional transient temperature field, the temperature distribution changes over time, which is why the time coordinate is included in the expression.The other options are not correct for the following reasons:1. : This expression represents a two-dimensional steady-state temperature field, where the temperature distribution does not change over time.2. : This expression represents a three-dimensional transient temperature field, where the temperature distribution changes over time and varies in three spatial dimensions.3. : This expression represents a three-dimensional steady-state temperature field, where the temperature distribution does not change over time and varies in three spatial dimensions.