Recent questions tagged q13

Four bells rings at 6,7,8,9 seconds respectively all the bells rings together after how many seconds

asked Oct 21, 2017 by priyanka.c

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The ratio of wavelengths of the last line of Balmer series and the last line of Lyman series is

asked Oct 10, 2017 by meena.p

1 answer

If the light of wavelength $\lambda$ is incident on metal surface, the ejected fastest electron has speed v. If the wavelength i changed to $\frac{3 \lambda}{4}$, the speed of the fastest emitted electron will be:

asked Oct 9, 2017 by priyanka.c

1 answer

Jaya is measuring two line segments. The first line segment is 30 cm long. The second line segment is 500 mm long. How long are the line segments together? (answer in cm)

asked Oct 2, 2017 by priyanka.c

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Find out the total number of mathematical shapes in the following figure

asked Sep 25, 2017 by priyanka.c

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Find the value of the following expression <br> (59856 – 24632)+(57864 – 34231) <br> 35224 +23633

asked Sep 21, 2017 by priyanka.c

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Find the value of following expression <br> DCCLXIII + CDXXXIX =

asked Sep 18, 2017 by priyanka.c

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asked Sep 7, 2017 by priyanka.c

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If $'+'$ means $'\times',\; '-' $ means $\;'÷'\; '\times'$ means c asscxx $'-'$ and $' '$ means $'+'$, then $9 + 8 ÷ 8 - 4 \times 9 = ?$

asked Sep 1, 2017 by priyanka.c

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Write the following expression in expanded from 34879 + 5480 = 40,359

asked Aug 16, 2017 by priyanka.c

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Naren had 46 balloons. 12 balloons were filled with water and 7 balloon were filled with some color papers in that. What is the number of balloons left out?

asked Aug 4, 2017 by priyanka.c

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Harini need 3 meters cloth to stitch her dress. But Sanjay need only 2 meters. The cloth is available to stitch 6 dresses for Sanjay. Then how many dresses can be stitched by Harini by this cloth?

asked Aug 4, 2017 by priyanka.c

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A closely ward solenoid $80\;cm$ long has $ 5$ layers of winding of 400 turns each.The diameter of the solenoid is $1.8 \;cm$ . If the current carried is $8.0\;A$ , estimate the magnitude of B inside the solenoid near its center .

asked Jul 23, 2015 by meena.p

1 answer

Two long and parallel straight wires A and B carrying currents of $8.0\;A$ and $5.0 \;A$ same direction are separated by a distance of $4.0\;cm$ . Estimate the force on a $10\;cm$ section of wire A?

asked Jul 23, 2015 by meena.p

1 answer

A short bar magnet with its axis at $30^{\circ}$ with a uniform external magnetic field of $0.25\;T$ experiences a forque a magnitude equal to $4.5 \times 10^{-2}\;J$ What is the magnitude of magnetic moment of the magnet?

asked Jul 10, 2015 by meena.p

1 answer

Alloys of metals have greater / lesser resistivity than that of their constituent metal?

asked Jun 29, 2015 by meena.p

1 answer

What is the change on $Cu^{++}$

asked Apr 21, 2015 by meena.p

1 answer

If the eccentricity of an ellipse is $\large\frac{5}{8}$ and the distance between its foci is 10, then find latus rectum of the ellipse.

asked Oct 9, 2014 by sreemathi.v

1 answer

The freezing point of 0.02mole fraction solution of acetic acid in benzene is 277.4K.Assuming molality equal to molarity,calculate $K_c$ for the equilibrium reaction $2CH_3COOH \;\;\leftrightharpoons\;\;(CH_3COOH)_2$.

asked Aug 6, 2014 by sreemathi.v

1 answer

How many liters of water will have to be added to $1125$ liters of the $45\%$ solution of acid so that the resulting mixture will contain more than $25 \%$ but less than $30\%$ acid content ?

asked Aug 5, 2014 by meena.p

1 answer

The unit cell in a crystal of diamond belongs to a cubic crystal system but doesn't correspond to the Bravais lattice.The volume of unit cell of diamond is $0.0454nm^3$ and the density of diamond is $3.52g/cc$.Find the number of carbon atoms in a unit cell of diamond?

asked Aug 1, 2014 by sreemathi.v

1 answer

Solve the system of inequalities graphically $4x+3y \leq 60 ; y \geq 2x; x \geq 3 ; x,y \geq 0 $

asked Jul 31, 2014 by meena.p

1 answer

Solve the inequality for real $x: 2(2x+3) -10 < 6(x-2)$

asked Jul 25, 2014 by meena.p

1 answer

Which of the following facts regarding boron and silicon is not true ?

asked Jul 25, 2014 by thanvigandhi_1

1 answer

Find the equations of the hyperbola satisfying the given conditions : Foci $(\pm 4, 0)$, the latus rectum is of length $12$

asked Jul 21, 2014 by thanvigandhi_1

1 answer

Find the equation for the ellipse that satisfies the given conditions : Ends of major axis $(\pm 3, 0)$ , ends of minor axis $(0, \pm 2)$

asked Jul 18, 2014 by thanvigandhi_1

1 answer

Find the equation of the circle passing through $(0,0)$ and making intercepts a and b on the coordinate axes.

asked Jul 13, 2014 by thanvigandhi_1

1 answer

Mean and standard deviation of 100 items are 50 and 4 , respectively . find the sum of all items and sum of the squares of the items.

asked Jul 4, 2014 by meena.p

1 answer

If the equation of the base of an equilateral triangle is x + y = 2 and the vertex is (2, – 1), then find the length of the side of the triangle \[\] [Hint: Find length of perpendicular (p) from (2, – 1) to the line and use $p = l \: \sin 60^{\circ}$, where $l$ is the length of side of the triangle]

asked Jul 1, 2014 by thanvigandhi_1

1 answer

The numbers 1,2,3 and 4 are written separately on four slips of paper.The slips are put in a box and mixed thoroughly.A person draws two slips from the box,one after the other,without replacement.Describe the sample space for the experiment

asked Jun 26, 2014 by sreemathi.v

1 answer

If the coefficient of $x^7$ in the expansion of $(a^2x+b^{-1}x^{-1})^{11}$ is equal to the coefficient of $x^{-7}$ in $(ax-b^{-1}x^{-2})^{11}$ then $ab=$

asked Jun 25, 2014 by sreemathi.v

1 answer

Show that the middle term in the expansion of $(x-\large\frac{1}{x})^{2n}$ is $\large\frac{1\times 3\times 5\times..... (2n-1)}{n!}$$\times (-2)^n$

asked Jun 24, 2014 by sreemathi.v

1 answer

Show that $9^{n+1}-8n-9$ is divisible by 64 whenever n is a positive integer.

asked Jun 23, 2014 by sreemathi.v

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