Flow resistance
Introduction
Medicine * Vascular resistance
Physics *Electrical resistance, the measure of the degree to which a conductor opposes the flow of an electric current through that conductor*Friction**Drag (physics) ("air resistance"), fluid or gas forces opposing motion and flow*The inverse of Hydraulic conductivity, the ease with which water can flow through pore spaces or fractures in soil or rock*Thermal resistance, a measure of difficulty of heat flow through a substance**Thermal conductivity, how well heat flows through a substance**Thermal resistance in electronics, heat considerations in electronics design
Music *Resistance to airflow through a wind instrument due to air friction (for instance, a tightly-coiled French horn has higher resistance than a straight unvalved slide trumpet)