In a group of 1000 people, there are 750 who can speak Hindi and 400 who can speak English. How many can speak Hindi only ?How many can speak English ? How many can speak both Hindi and English?

Anonymous User Maths 22 Apr, 2019 142 views

A billiard ball is hit by a cue at a point distance h above the centre. It acquires a linear velocity v0. Let m be the mass and r be the radius of the ball. The angular velocity acquired by the ball is?

Anonymous User Physics 20 Apr, 2019 284 views

A simple pendulum is suspended in a lift which 5. is going up with an acceleration 5 m/s^2. An electric field of magnitude 5 N/C and directed vertically upward is also present in the lift. The charge of the bob is 1 mC and mass is 1 mg. Taking g = and length of the simple pendulum 1m, the time period of the simple pendulum is

Anonymous User Physics 20 Apr, 2019 345 views

Calculate the ratio of the speed of sound in neon to that in water vapour at any temperature. [Molecular weight of neon = 2.02 * 10–2 kg/mol and for water vapours = 1.8 * 10–2 kg/mol]

Anonymous User Physics 19 Apr, 2019 645 views

Silver forms ccp lattice and X-ray studies of its crystals show that theedge length of its unit cell is 408.6 pm. Calculate the density of silver (Atomic mass = 107.9 u).

Rajkumar Yadav Chemistry 19 Apr, 2019 1002 views

X-ray diffraction studies show that copper crystallises in an fcc unit cell with cell edge of 3.608×10-8 cm. In a separate experiment, copper is determined to have a density of 8.92 g/cm3, calculate the atomic mass of copper

Rajkumar Yadav Chemistry 19 Apr, 2019 163 views

An element has a body-centred cubic (bcc) structure with a cell edge of 288 pm. The density of the element is 7.2 g/cm3. How many atoms are present in 208 g of the element?

Rajkumar Yadav Chemistry 19 Apr, 2019 172 views

What is Packing Efficiency?Explian

Rajkumar Yadav Chemistry 19 Apr, 2019 51 views

Atoms of element B form hcp lattice and those of the element A occupy 2/3rd of tetrahedral voids. What is the formula of the compound formed by the elements A and B?

Rajkumar Yadav Chemistry 19 Apr, 2019 605 views

A compound is formed by two elements X and Y. Atoms of the elementY (as anions) make ccp and those of the element X (as cations) occupy all the octahedral voids. What is the formula of the compound?

Rajkumar Yadav Chemistry 19 Apr, 2019 211 views

What is Close Packed Structures please explain ?

Rajkumar Yadav Chemistry 19 Apr, 2019 55 views

A number consists of three digits which are in G.P. the sum of the right hand and left hand digits exceeds twice the middle digit by 1 and the sum of the left hand and middle digits is two third of the sum of the middle and right hand digits. Find the numbers?

Anonymous User Maths 18 Apr, 2019 950 views

What is FaceCentred Cubic Unit Cell

Rajkumar Yadav Chemistry 16 Apr, 2019 73 views

What is BodyCentred Cubic Unit Cell

Rajkumar Yadav Chemistry 16 Apr, 2019 112 views

What is Primitive Cubic Unit Cell ?

Rajkumar Yadav Chemistry 16 Apr, 2019 64 views

Explain different properties of Metallic Solids,Molecular solids, Ionic solids and Covalent

Rajkumar Yadav Chemistry 16 Apr, 2019 58 views

Explain Covalent or Network Solids

Rajkumar Yadav Chemistry 16 Apr, 2019 75 views

Classification of Crystalline Solids

Rajkumar Yadav Chemistry 16 Apr, 2019 53 views

What is the Difference Between Amorphous and Crystalline Solids?

Rajkumar Yadav Chemistry 16 Apr, 2019 62 views

What is Amorphous and Crystalline Solids

Rajkumar Yadav Chemistry 16 Apr, 2019 56 views

A sounding body emitting a frequency of 150 Hz is dropped from a height. During its fall under gravity it crosses a balloon moving upwards with a constant velocity of 2m/s one second after it started to fall. The difference in the frequency observed by the man in balloon just before and just after crossing the body will be:

Given that -velocity of sound = 300m/s; g = 10m/s2.

(A) 4

(B) 6

(C) 8

(D) 12

Kirti Gulati Physics 16 Apr, 2019 66 views

Describe the General Characteristics of Solid State

Rajkumar Yadav Chemistry 16 Apr, 2019 63 views

One mole of an ideal gas at a temperature T1 expands slowly according to the law p/V = constant. Its final temperature is T2. The work done by the gas is : Kirti Gulati Physics 16 Apr, 2019 101 views

A passenger is standing d distance away from a bus. The bus begins to move with constant acceleration a. To catch the bus, the passenger runs at a constant speed u towards the bus. What must be the minimum speed of the passenger so that he may catch the bus?

Anonymous User Physics 15 Apr, 2019 245 views

A driver takes 0.30 s to apply the brakes after he sees a need for it. This is called the reaction time of the driver. If he is driving a car at a speed of 54 km/h and the brakes cause a deceleration of 5.0m/s2, find the distance travelled by the car after he sees the need to put the brakes on ?

Anonymous User Physics 15 Apr, 2019 83 views

Two moving particles P and Q are 10 m apart at any instant. Velocity of P is 8 m/s at 30degree, from line joining the P and Q and velocity of Q is 6m/s at 30 degree.Calculate the angular velocity of P w.r.t. Q

Anonymous User Physics 15 Apr, 2019 1290 views Mitali Rajpoot Maths 13 Apr, 2019 115 views

The force of repulsion between two point charges is F, when these are at a distance of 1 m. Now the point charges are replaced by spheres of radii 25 cm having the charge same as that of point charges. The distance between their centres is 1 m, then compare the force of repulsion in two cases.

Anonymous User Physics 13 Apr, 2019 1302 views Niti Gupta Maths 12 Apr, 2019 77 views Can anybody help me here. Thanks!!

Niti Gupta Maths 12 Apr, 2019 66 views

A large number of particles are moving each with speed v having directions of motion randomly distributed. What is the average relative velocity between any two particles averaged over all the pairs?

Rahul Kumar Physics 12 Apr, 2019 379 views

A particle is moving along a straight line along x-axis with an initial velocity of 2 m/s towards positive x-axis. A constant acceleration of 0.5 m/s2 towards negative x-axis starts acting on particle at t=0. Find velocity (in m/s) of particle at t = 2s.

Rahul Kumar Physics 12 Apr, 2019 72 views

A body is thrown up with a speed 49 m/s. It travels 5 m in the last second of its upward journey. If the same body is thrown up with a velocity 98 m/s, how much distance (in m) will it travel in the last second. (g = 10 m/s2)?

Rahul Kumar Physics 12 Apr, 2019 170 views

Given f(x) = e (x 2 - x), find
a) the interval(s) of increase and decrease of f,
b) value(s) of x for which f has a local extremum,
c) the interval(s) of concavity and any inflection point(s).

Niti Gupta Maths 12 Apr, 2019 64 views