The trace of a square matrix is defined to be the sum of its diagonal entries. If A is a...

Let O be the centre of the circle $\mathrm{x}^2+\mathrm{y}^2=\mathrm{r}^2$, where $\mathrm{r}>\frac{\sqrt{5}}{2}$. Suppose $P Q$ is a chord of this circle...

The probability that a missile hits a target successfully is 0.75. In order to destroy the target completely, at least...

For a complex number z, let $\operatorname{Re}(z)$ denote the real part of $z$. Let $S$ be the set of all...

Let e denote the base of the natural logarithm. The value of the real number a for which the right...

For a polynomial $\mathrm{g}(\mathrm{x})$ with real coefficient, let $\mathrm{m}_{\mathrm{g}}$ denote the number of distinct real roots of $\mathrm{g}(\mathrm{x})$. Suppose S...

Let $\mathrm{x} \in \mathbb{R}$ and let $...

A container with 1 kg of water in it is kept in sunlight, which causes the water to get warmer...

In a triangle PQR , let $\overrightarrow{\mathrm{a}}=\overrightarrow{\mathrm{QR}}, \overrightarrow{\mathrm{b}}=\overrightarrow{\mathrm{RP}}$ and $\overrightarrow{\mathrm{c}}=\overrightarrow{\mathrm{PQ}}$. If $|\overrightarrow{\mathrm{a}}|=3,|\overrightarrow{\mathrm{~b}}|=4$ and $\frac{\overrightarrow{\mathrm{a}} \cdot(\overrightarrow{\mathrm{c}}-\overrightarrow{\mathrm{b}})}{\overrightarrow{\mathrm{c}} \cdot(\overrightarrow{\mathrm{a}}-\overrightarrow{\mathrm{b}})}=\frac{|\overrightarrow{\mathrm{a}}|}{|\overrightarrow{\mathrm{a}}|+|\overrightarrow{\mathrm{b}}|}$, then the value of...

Let f : [0, 2] -> R be the function defined by
$...

The inductors of two $L R$ circuits are placed next to each other, as shown in the figure. The values...

A cubical solid aluminium (bulk modulus $=-V \frac{\mathrm{dP}}{\mathrm{dV}}=70 \mathrm{GPa}$ ) block has an edge length of 1 m on the...

Let $a_1, a_2, a_3, \ldots$. be a sequence of positive integers in arithmetic progression with common difference 2 . Also,...

Two capacitors with capacitance values $\mathrm{C}_1=2000 \pm 10 \mathrm{pF}$ and $C_2=3000 \pm 15 \mathrm{pF}$ are connected in series. The voltage...

Let $m$ be the minimum possible value of $\log _3\left(3^{y_1}+3^{y_2}+3^{y_3}\right)$, where $y_1, y_2, y_3$ are real numbers for which $y_1+y_2+y_3=9$....

In the balanced condition, the values of the resistances of the four arms of a Wheatstone bridge are shown in...

A spherical bubble inside water has radius $R$. Take the pressure inside the bubble and the water pressure to be...

Starting at time $t=0$ from the origin with speed $1 \mathrm{~ms}^{-1}$, a particle follows a two-dimensional trajectory in the $x-y$...