## Heat Flux

What is the fundamental relationship for heat flux?

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__**Hint**

**Hint**

The SI units for heat flux:

$$$Watts/meter^2=kg/s^3$$$

Heat flux is the energy flow per unit of area per unit of time. It is also a vector (direction and magnitude), and is typically expressed by Fourier's law (simplified in one dimension):

$$$q_{x}=-k\frac{dT}{dx}$$$

where k = thermal conductivity, and dT is the temperature gradient.

Heat flux is the energy flow per unit of area per unit of time. It is also a vector (direction and magnitude), and is typically expressed by Fourier's law (simplified in one dimension):

$$$q_{x}=-k\frac{dT}{dx}$$$

where k = thermal conductivity, and dT is the temperature gradient.