Email

Chat with tutors

Login

Ask Questions, Get Answers

Menu X

home ask tuition questions practice papers mobile tutors pricing

X

Recent questions tagged class11

There are $10$ lamps in a hall. Each of them can be switched on independently. The no. of ways in which the hall can be illuminated is?

asked Aug 13, 2013 by rvidyagovindarajan_1

1 answer

If $T_n$ denotes no. of triangles formed by the vertices of a regular $n$ sided polygon and if $T_{n+1}-T_n=21$, then $n=?$

asked Aug 13, 2013 by rvidyagovindarajan_1

1 answer

The no. of diagonals of $n$ sided polygon =?

asked Aug 13, 2013 by rvidyagovindarajan_1

1 answer

1.1! + 2.2! + 3.3! + ......... + n.n! = ?

asked Aug 13, 2013 by rvidyagovindarajan_1

1 answer

What is the 7th word in the arrangement of the permuted words formed by the letters of the word 'SWISS' as per the alphabetical order as in dictionary?

asked Aug 12, 2013 by rvidyagovindarajan_1

1 answer

The no. of arrangements of the letters of the word 'BANANA' in which the 2 $N^s$ do not come adjacently is?

asked Aug 12, 2013 by rvidyagovindarajan_1

1 answer

The no. of arrangements of the letters of the word 'BANANA' in which the 2 $n^s$ do not come adjacently is?

asked Aug 12, 2013 by rvidyagovindarajan_1

0 answers

The letters of the word 'COCHIN' are permuted and all the permutations are arranged in alphabetical order as in Dictionary. The no. of words that appear before the word 'COCHIN' is?

asked Aug 12, 2013 by rvidyagovindarajan_1

1 answer

There are 12 points in plane out of which 5 points are collinear. How many different lines can be drawn using these points?

asked Aug 12, 2013 by rvidyagovindarajan_1

1 answer

There are 12 points in a plane out of which 7 points lie on a st. line (collinear). How many triangles can be formed using these points as vertices?

asked Aug 12, 2013 by rvidyagovindarajan_1

1 answer

The total no. of ways in which 5 balls of different colours can be distributed among 3 persons so that each person gets atleast one ball is ?

asked Aug 12, 2013 by rvidyagovindarajan_1

1 answer

At what velocity in (km/s) should a body be projected horizontally at a height of 30 km from the ground so that it becomes the satellite of the earth? neglect air friction. (radius of earth is $6370 \;Km$)

asked Aug 12, 2013 by meena.p

1 answer

An object lying at the equator will fly off the surface of the earth , if the speed of rotation of earth increases n time its present value, then n is

asked Aug 12, 2013 by meena.p

1 answer

The eacape velocity from earth is 11km/s. The escape velocity from a planet having twice the radius and same mean density as that of earth is

asked Aug 12, 2013 by meena.p

1 answer

A Spherical uniform planet is rotating about its axis . The velocity of a point on its equator is v. Due to the rotation of planet about its axis the acceleration due to gravity of at equator is $\large\frac{1}{2}$ of acceleration due to gravity at poles. The escape velocity of a particle on the poles of planet in terms of v

asked Aug 12, 2013 by meena.p

1 answer

Four couples (husband and wife) decide to form a committee of 4 members. How many ways this can be done so that no couple finds a place.

asked Aug 11, 2013 by rvidyagovindarajan_1

1 answer

The number of positive integral solutions of the equation $xyz=30$ is ?

asked Aug 11, 2013 by rvidyagovindarajan_1

1 answer

Suppose the gravitational force varies inversely as the $n^{th}$ power of distance, then the time period of planet in circular orbit of Radius 'R' around the sun will be proportional to

asked Aug 11, 2013 by meena.p

1 answer

Average density of the earth

asked Aug 11, 2013 by meena.p

1 answer

A particle of mass 10 g is kept on surface of a uniform sphere of mass 100 kg and radius 10 cm. Find the work done against gravitational force between them, to take the particle for away from sphere $(G=6.67 \times 10^{-11} Nm^2/kg)$

asked Aug 10, 2013 by meena.p

1 answer

Light planet is revolving around a very massive star in a circular orbit of radius 'r' with a period of revolution T. On what power of 't' will the square of period depend if the gravitational force of attraction between planet and the star is proportional to $r^{\large\frac{-5}{2}}$

asked Aug 10, 2013 by meena.p

1 answer

If the sun is about $9.3\times10^7\; km $ away from the earth, and its mass is $3.24\times10^5 \times m_e$, where $m_e$ is the mass of the earth, how far from the earth must a body be along a line towards the sun so that the sun’s gravitational pull balances the earth's?

asked Aug 10, 2013 by meena.p

1 answer

Planet Neptune travels around the sun with a period of 165 years. Find the ratio of $\large\frac{R_2}{R_1}$ where $R_2$ radius of Neptune orbit and $R_1$ radius of earth , both being considerd circular.

asked Aug 10, 2013 by meena.p

1 answer

A rocket is launched with velocity 10 km/s if radius of earth is R, then maximum height attained by it will be

asked Aug 10, 2013 by meena.p

1 answer

If radius of the earth were to shrink by one percent, its mass remaining same the value of g on the earth's surface would

asked Aug 10, 2013 by meena.p

1 answer

A simple pendulum has a time period $T_1$ When on earth's surface, and $T_2$ When taken to a height R above the earth's surface, where R is radius of earth. Then $\large\frac{T_2}{T_1}$ is

asked Aug 10, 2013 by meena.p

1 answer

Two satellites have their masses in the ratio $3:1$ The ratio of the orbit (circular ) are $1:4$ then the ratio of total mechanical energy of A and B

asked Aug 10, 2013 by meena.p

1 answer

The studens of a class take a test having 10 questions of true or false objective type questions. No two students answer are same. None of the students has got all the answers correct. How many students are there in the class.

asked Aug 9, 2013 by rvidyagovindarajan_1

1 answer

The number of seven digit integers whose sum of the digits is ten, formed by using the digits 1, 2 and 3 only is

asked Aug 9, 2013 by rvidyagovindarajan_1

1 answer

There are two urns. Urn A has 3 distinct red balls and Urn B has 9 distinct blue balls. From each urn two balls are drawn at random and then transfered to other. The no. of ways in which this can be done is?

asked Aug 9, 2013 by rvidyagovindarajan_1

1 answer

For a planet moving aroung the sun in an elliptical orbit, which of the following quantities remain constant?

asked Aug 9, 2013 by meena.p

1 answer

Two planets have same average density but their radii are $R_1$ and $R_2$. If acceleration due to gravity on these planets are $g_1$ and $g_2$ respectively.

asked Aug 9, 2013 by meena.p

1 answer

A planet moves around the sun. At a given point P,it is closet from the sun at a distance $d_1$ and speed $v_1$ At another point Q when it is farthest from the sun at a distance $d_2$, its speed will be

asked Aug 9, 2013 by meena.p

1 answer

A satellite moves in a circle around earth The radius of this circle is equal to one half of the radius of the moon's orbet. The satellite completes one revolution in

asked Aug 9, 2013 by meena.p

1 answer

The value of escape velocity on a certain planet is $ 2 km/s$ then the value of arbital speed for a satellite arbiting close to its surface is

asked Aug 9, 2013 by meena.p

1 answer

Gas escapes from the surface of a planet because it aquires escape velocity. The escape velocity will depend on which of the following <br> 1) Mass of planet <br> 2) Mass of particle escaping <br> 3) Temperature of the planet <br> 4) Radius of the planet

asked Aug 9, 2013 by meena.p

1 answer

In the gravitational field , at a point where the gravitational potential is zero

asked Aug 9, 2013 by meena.p

1 answer

The density of a newly discovered planet is twice that of earth . The acceleration due to gravity at the surface of the planet is equal to that at the surface of earth. If the radius of earth is R, radius of planet will be

asked Aug 9, 2013 by meena.p

1 answer

The angular speed of the earth is doubled , the value of acceleration due to gravitty (g) at north pole

asked Aug 9, 2013 by meena.p

1 answer

An iron ball and wooden ball of same radius are released from a height 'h' in vacuum. The time taken by both of them to reach ground is

asked Aug 9, 2013 by meena.p

1 answer

The density of earth increased 4 times and its radius becomes half of what it is , our weight will

asked Aug 9, 2013 by meena.p

1 answer

A body of mass m moving with velocity v collides head on with another body of mass $2m$ which is initially at rest. The ratio of K.E of colliding body before and after collision will be

asked Aug 9, 2013 by meena.p

1 answer

Two masses of $0.1\;kg$ and $0.4 \;kg$ move towards each other with velocities $1 m/s$ and $0.1 m/s$ respectively. After collision they stick together . In 10 seconds the combined mass travels

asked Aug 9, 2013 by meena.p

1 answer

Two balls at same temperature collide inelastically which of the following are not conserved 1) Kinetic energy 2) Velocity 3) temperature 4) momentum

asked Aug 9, 2013 by meena.p

1 answer

A student is to answer $10$ questions out of $13$ in an examination, so that he must choose at least $4$ from first $5$ questions. The no. of choices available to him is ?

asked Aug 8, 2013 by rvidyagovindarajan_1

1 answer

A tennis ball dropped from height of $2m$ rebounds only $1.5 m, $ after hitting the ground , What fraction of energy is lost in the impact

asked Aug 8, 2013 by meena.p

1 answer

A spring 40 mm long is streched by application of a force. If 10 N force is required to stretch the spring through 1 mm, then work done in stretching the spring through 40 mm is

asked Aug 8, 2013 by meena.p

1 answer

If momentum of boby increases by $0.01 %$ its kinetic energy will increase by

asked Aug 8, 2013 by meena.p

1 answer

The smallest positive natural number $n$ such that $n!$ is divisible by $990$ is ?

asked Aug 8, 2013 by rvidyagovindarajan_1

1 answer

If $\large\frac{1}{a},\frac{1}{b},\frac{1}{c} $ are in A.P., then the equation $a(b-c)x^2+b(c-a)x+c(a-b)=0$ has

asked Aug 8, 2013 by rvidyagovindarajan_1

1 answer

Page:

« prev
1
...
225
226
227
228
229
230
231
...
238
next »

Feedback Terms Facebook Twitter About Us

Your payment for is successful.

...