Several factors can cause pyroclastic flows. Fountain collapse of a volcano's eruption column structure, and gravitational collapse may cause pyroclastic flows.
An electric field causes electrons to flow when a switch is turned on.
An electric field causes electrons to flow when a switch is turned on.
An electric field causes electrons to flow when a switch is turned on.
The name for the potential difference that causes current to flow is voltage.
The movement of electron towards the high potential causes electric current to flow in a circuit.
Gravity :)
High pressure
fat
This causes flow because voltage is what powers a circuit
Voltage causes current to flow in an electric circuit.
voltage
electrons