If $p \rightarrow (q \vee r)$ is false,then the truth values of $p, q, r$ are respectively

If two sets $A$ and $B$ have $99$ elements in common,then the number of elements common to the sets $A \times B$ and $B \times A$ is equal to

The figure shows the vertical section of a frictionless surface. $A$ block of mass $2 \, kg$ is released from position $A$. Its kinetic energy $(KE)$ as it reaches position $C$ is ............ $J$.

Tetrahalides of group $14$ elements (except that of carbon) act as

The angle between the lines whose direction cosines are $\left(\frac{\sqrt{3}}{4}, \frac{1}{4}, \frac{\sqrt{3}}{2}\right)$ and $\left(\frac{\sqrt{3}}{4}, \frac{1}{4}, \frac{-\sqrt{3}}{2}\right)$ is:

Two equal resistances when connected in series to a battery,consume electric power of $60 \ W$. If these resistances are now connected in parallel combination to the same battery,the electric power consumed will be............. $W$