User:LinguisticDemographer/Draft

List of hundreds of England and Wales

List of Welsh towns twinned with a Breton town

List of places in Pembrokeshire (categorised)

Region:see ISO 3166-1 alpha-2 Type:city(pop), city, airport, mountain, isle, waterbody, landmark, forest

(Welsh: Abertawe, "mouth of the Tawe")

Dyfed

Cantref	Cwmwd	Red Book "Kymwt"	Note
Cemais	Cwmwd Is Nyfer	Is Neuer
	Cwmwd Uwch Nyfer	Uwch Neuer

This is the Carman equation:

$S={\cfrac {7d}{\rho \,(1-\epsilon \,)}}{\sqrt {\dfrac {\epsilon \,^{3}\pi \,\delta \,P}{l\eta \,Q}}}$

where:

• S is specific surface, m²·kg^-1
• d is the cylinder diameter, m
• ρ is the sample particle density, kg·m^-3
• ε is the volume porosity of the bed (dimensionless)
• δP is the pressure drop across the bed, Pa
• l is the cylinder length, m
• η is the dynamic viscosity, Pa·s
• Q is the flowrate, m³·s^-1