If $z = 3 + 5i$,then $z^3 + \bar{z} + 198$ is equal to

If $\tan ^{-1} x = y$,then . . . . . . .

$A$ particle moves with a velocity $\vec{v} = 5\hat{i} - 3\hat{j} + 6\hat{k} \text{ m/s}$ under the influence of a constant force $\vec{F} = 10\hat{i} + 10\hat{j} + 20\hat{k} \text{ N}$. The instantaneous power will be ............... $\text{J/s}$.

In a uniform electric field,a cube of side $1 \ cm$ is placed. The total energy stored in the cube is $8.85 \ \mu J$. The electric field is parallel to four of the faces of the cube. The electric flux through any one of the remaining two faces is.

Which of the following is the superoxide of potassium?

Exhausted permutit does not contain $.......$ ion.