In thermodynamics,which one of the following properties is not an intensive property?

The solution of the differential equation $x y^2 d y - (x^3 + y^3) d x = 0$ is

If $\int \frac{e^x-1}{e^x+1} d x=f(x)+c$,then $f(x)$ is equal to

Data Entry - Physics

The instantaneous displacement of a simple pendulum oscillator is given by $x = A \cos \left( \omega t + \frac{\pi}{4} \right)$. Its speed will be maximum at time:

To which series does $Catharanthus$ $roseus$ belong?