Data Entry - Physics

When did $R.H. Whittaker$ propose the five-kingdom classification system?

In the leaf,vascular bundles are found in the

If the equation of one tangent to the circle with centre at $(2, -1)$ from the origin is $3x + y = 0$,then the equation of the other tangent through the origin is

Which of the following is a buffer solution?

In adiabatic compression,the decrease in volume is associated with