Recent questions tagged q119

Under critical conditions , the compressibility factor for a gas is

asked Mar 3, 2014 by sharmaaparna1

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Hydrolysis of neopentyl bromide under $SN_1$ process results into

asked Feb 28, 2014 by meena.p

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What would be the product in the below reaction:

asked Feb 27, 2014 by sreemathi.v

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Find the locus of intersection of two perpendicular tangent to the hyperbola $\large\frac{x^2}{a^2}-\frac{y^2}{b^2}$$=1$?

asked Feb 10, 2014 by sreemathi.v

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Natural numbers are divided into groups $\;(1)\;,\;(2,3,4)\;,\;(5,6,7,8,9)\;.....$ Sum of first and last term of $n^{th}\;$ group will be :

asked Jan 21, 2014 by yamini.v

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Two hydrogen atoms collide head on and end up with zero kinetic energy.Each atom then emits a photon of wavelength 121.6nm.Which transition leads to this wavelength ?How fast were the hydrogen atoms traveling before collision?$R_H=1.097\times 10^7m^{-1}$ and $m_H=1.67\times 10^{-27}Kg$

asked Jan 16, 2014 by sreemathi.v

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If $ \overrightarrow r\times\overrightarrow b=\overrightarrow c\times\overrightarrow b$ and $\overrightarrow r.\overrightarrow a=0$, where $\overrightarrow a=2\hat i+3\hat j-\hat k,\:\overrightarrow b=3\hat i-\hat i+\hat k\:and\:\:\overrightarrow c=\hat i+\hat j+3\hat k$, then $\overrightarrow r=?$

asked Jan 7, 2014 by rvidyagovindarajan_1

1 answer

$\lim\limits_{x\to 0}\large\frac{\sin x}{x}$

asked Dec 31, 2013 by sreemathi.v

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$ I= \int \limits_0^{\frac{\pi}{2}} \cos ^3 x dx$

asked Dec 20, 2013 by meena.p

1 answer

Thorn of Bougainvillea and tendril of cucurbita are examples of :

asked Dec 18, 2013 by thanvigandhi_1

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If 200 MeV of energy is released in the fission of 1 nucleus of $_{92}U^{235}$, the number of nuclei that undergo fission to produce energy of 10 kwh in one second :

asked Nov 18, 2013 by thanvigandhi_1

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Two deuterium nuclei each of mass 'm' fuse together, to form a Helium nucleus, releasing an energy E . If 'c' is the velocity of light , the mass of Helium nucleus formed will be :

asked Nov 4, 2013 by thanvigandhi_1

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$F_{pp}.F_{nn}$ and $F_{np}$ are the nuclear forces between proton- proton, neutron-neutron and neutron proton respectively . Then relation between them is

asked Oct 20, 2013 by meena.p

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The thermo emf in lead-iron thermocouple with one junction at $0^{\circ}C$ , is given by $e=1784t-bt^2$ in volts, where $t^{\circ}C$ is the temperature of the other junction. The neutral temperature is $371.7^{\circ}C$. Then the value of b in $V/(^{\circ}C)^2$ is

asked Oct 20, 2013 by thanvigandhi_1

1 answer

A rod of length l is held vertically stationary with its lower and located at a point 'P', on the horizontal plane. When the rod is released to topple about 'P', the velocity of the upper end of the rod with which it hits the ground is :

asked Oct 14, 2013 by meena.p

1 answer

When the temperature difference between the junctions of a given thermocouple is $120^{\circ}C$ , the thermo emf is 30 m V. The temperature of hot junction is decreased by $20^{\circ}C$ and cold junction is increased by $6^{\circ}C$ . The percentage decrease in thermo emf is ( assume thermo emf is directly proportional to the temperature difference)

asked Oct 13, 2013 by thanvigandhi_1

1 answer

Three particles $\alpha- particle,$ proton and deuteron are acceleration by the same potential difference. The velocities of them are in the ratio:

asked Oct 1, 2013 by meena.p

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A constant voltage of $25\; V$ is applied to a series $L-R$ circuit at $t=0$, by closing a switch. What is the potential difference across the resistor and the inductor at time $t=0$?

asked Sep 24, 2013 by meena.p

1 answer

The base current in a transistor circuit changes from $45\;\mu A$ to $140\;mu A$. Accordingly, the collector current changes from $0.2\;mA$ to $4.00\;mA$. The gain in current is

asked Sep 18, 2013 by meena.p

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The value of $[3]+11([5]+11[6])$ is

asked May 27, 2013 by poojasapani_1

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The length of the latus rectum of the rectangular hyperbola $xy=32$ is

asked May 14, 2013 by poojasapani_1

1 answer

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