If $(a \times b)^2 + (a \cdot b)^2 = 144$ and $|a| = 4$,then $|b| = $

If $x$ is small,so that $x^2$ and higher powers can be neglected,then the approximate value for $\frac{(1-2 x)^{-1}(1-3 x)^{-2}}{(1-4 x)^{-3}}$ is

If $A$ and $B$ are any two sets,then $A \cup (A \cap B)$ is equal to

For the transistor circuit shown below,if $\beta = 100$ and the voltage drop between the emitter and base is $0.7\ V$,then the value of $V_{CE}$ will be.....$V$.

When a charge of $3\, C$ is placed in a uniform electric field,it experiences a force of $3000\, N$. Within this field,the potential difference between two points separated by a distance of $1\, cm$ is:

Compared to blood,our lymph has: