pressure
Why is pressure comes under scalar quantity?
Pressure is defined as force per unit area.
Pressure, P=F/A
Pressure is a scalar quantity, basically it is a rank ZERO tensor.
Also we all know that force is a vector quantity & still we say pressure as scalar quantity because of the fact that it is the component of force along the direction of area that is taken into account while defining pressure.
Thus the direction of quantities involved remain fixed and pressure becomes a scalar quantity.