If the internal energy of an ideal gas decreases by the same amount as the work done by the system,the process is

Which of the substances $A, B$ or $C$ has the highest specific heat $?$ The temperature vs time graph is shown.

If $\cos ^{-1}\left(\frac{x}{2}\right)+\cos ^{-1}\left(\frac{y}{3}\right)=\theta$,then $9x^2-12xy\cos \theta+4y^2=$

If two angles of $\triangle ABC$ are $45^{\circ}$ and $60^{\circ}$,then the ratio of the smallest side to the greatest side is:

What is the scientific name of Jojoba?

The refracting angle of a prism is $A$ and the refractive index of the material of the prism is $\cot(A/2)$. Then the angle of minimum deviation will be