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Temperature of an ideal gas, initially at \(27^{\circ} \mathrm{C}\), is raised by \(6^{\circ} \mathrm{C}\). The rms velocity of the gas molecules will,
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A liquid of bulk modulus \(k\) is compressed by applying an external pressure such that its density increases by \(0.01 \%\). The pressure applied on the liquid is
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A uniform capillary tube of length / and inner radius \(r\) with its upper end sealed is submerged vertically into water. The outside pressure is \(\mathrm{p}_{0}\) and surface tension of water is \(\gamma\). When a length \(\mathrm{x}\) of the capillary is submerged into water, it is found that water levels inside and outside the capillary coincide. The value of \(x\) is
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A uniform string of length \(L\) and mass \(M\) is fixed at both ends while it is subject to a tension \(T\). It can vibrate at frequencies \((v)\) given by the formula (where \(n=1,2,3, \ldots .\).)
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The velocity of a particle executing a simple harmonic motion is \(13 \mathrm{~ms}^{-1}\), when its distance from the equilibrium position (Q) is \(3 \mathrm{~m}\) and its velocity is \(12 \mathrm{~ms}^{-1}\), when it is \(5 \mathrm{~m}\) away from \(\mathrm{Q}\). The frequency of the simple harmonic motion is
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test test test test
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Let \(f(x)=\cos \left(\frac{\pi}{x}\right), x \neq 0\) then assuming \(k\) as an integer,
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Dec 13, 2021
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A hyperbola, having the transverse axis of length \(2 \sin \theta\) is confocal with the ellipse \(3 x^{2}+4 y^{2}=12\). Its equation is
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The area of the triangle formed by the intersection of a line parallel to \(x\)-axis and passing through \(P(h, k)\), with the lines \(y=x\) and \(x+y=2\) is \(h^{2}\). The locus of the point \(P\) is
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In a third order matrix \(\mathrm{A}, \mathrm{a}_{i j}\) denotes the element in the \(\mathrm{i}\)-th row and \(\mathrm{j}\)-th column. $$ \text { If } \begin{aligned} a_{i} &=0 \text { for } i=j \\ &=1 \text { for } i>j \\ &=-1 \text { for } i<j \end{aligned} $$ Then the matrix is
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On the occasion of Dipawali festival each sutdent of a class sends greeting cards to others. If there are 20 students in the class, the number of cards sends by students is
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Dec 13, 2021
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If the equation \(x^{2}-c x+d=0\) has roots equal to the fourth powers of the roots of \(x^{2}+a x+b=0\), where \(a^{2}>4 b\), then the roots of \(x^{2}-4 b x+2 b^{2}-c=0\) will be
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The area of the region lying above \(x\)-axis, and included between the circle \(x^{2}+y^{2}=2 a x \&\) the parabola \(y^{2}=a x\), \(a>0\) is
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Dec 13, 2021
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A particle is in motion along a curve \(12 y=x^{3}\). The rate of change of its ordinate exceeds that of abscissa in
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Dec 13, 2021
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Let \(I=\int_{0}^{1} \frac{x^{3} \cos 3 x}{2+x^{2}} d x\). Then
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Dec 13, 2021
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Consider the parabola \(y^{2}=4 x .\) Let \(P\) and \(Q\) be points on the parabola where \(P .(4,-4) \& Q(9,6) .\) Let \(R\) be a point on the arc of the parabola between \(\mathrm{P} \& \mathrm{Q}\). Then the area of \(\triangle \mathrm{PQR}\) is largest when
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The equation \(x \log x=3-x\)
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The normals to the curve \(y=x^{2}-x+1\), drawn at the points with the abscissa \(x_{1}=0, x_{2}=-1\) and \(x_{3}=\frac{5}{2}\)
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Dec 13, 2021
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Let \(f(x)=\left\{\begin{array}{cl}-2 \sin x, & \text { if } x \leq-\frac{\pi}{2} \\ A \sin x+B, & \text { if }-\frac{\pi}{2}<x<\frac{\pi}{2} . \text { Then } \\ \cos x, & \text { if } x \geq \frac{\pi}{2}\end{array}\right.\)
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Let \(A\) be the centre of the circle \(x^{2}+y^{2}-2 x-4 y-20=0 .\) Let \(B(1,7)\) and \(D(4,-2)\) be two points on the circle such that tangents at \(B\) and \(D\) meet at \(C\). The area of the quadrilateral \(A B C D\) is
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