List of top Physics Questions on physical world asked in Haryana PMT

A metal sphere cools at the rate of $ 3^{\circ} C/\min $ when its temperature is $ 50^{\circ} C $ . Its rate of cooling when its temperature is $ 40^{\circ} C $ and the temperature of surrounding is $ 25^{\circ} C $ is

Two stones are projected with same velocity $v$ at an angle $\theta$ and $(90-\theta)$. If $H$ and $H_{1}$ are the greatest heights in the two paths, what is the relation between $R , H$ and $H_{1}$ ?