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?
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?
What is Close Packed Structures please explain ?
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?
Four numbers are in A.P. If their sum is 20 and the sum of their squares is 120, then the middle terms are ?
Four different integers form an increasing A.P. One of these numbers is equal to the sum of the squares of the other three numbers. Find the numbers?
A particle is projected with a velocity of 30 m/s at an angle 60 above the horizontal on a slope of inclination 30 . Find its range, time of flight and angle of hit.
What is FaceCentred Cubic Unit Cell
What is BodyCentred Cubic Unit Cell
What is Primitive Cubic Unit Cell ?
Explain different properties of Metallic Solids,Molecular solids, Ionic solids and Covalent
Explain Covalent or Network Solids
Explain Metallic Solids
Explain Ionic Solids
Explain Molecular Solids
Classification of Crystalline Solids
What is the Difference Between Amorphous and Crystalline Solids?
What is Amorphous and Crystalline Solids
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
Describe the General Characteristics of Solid State
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 :
What is Projectile Motion ? Please explain with example?
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?
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 ?
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
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.
A particle of mass m carrying charge '+q1' is revolving around a fixed charge '–q2' in a circular path of radius r. Calculate the period of revolution.
If the distance between two equal point charges is doubled and their individual charges are also doubled, what would happen to the force between them?
What is the role of depressant in froth floatation process?
Copper can be extracted by hydrometallurgy but not zinc. Explain.
When a piece of polythene is rubbed with wool, a charge of – 2*10–7 C is developed on polythene. What is the amount of mass, which is transferred to polythene.
Can anybody help me here. Thanks!!
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?
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.
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)?
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).
WHAT IS Zone refining METHOD/TECHNIQUE TO REFINE METAL
WHAT IS Electrolytic refining METHOD/TECHNIQUE TO REFINE METAL
WHAT IS Liquation METHOD/TECHNIQUE TO REFINE METAL
What is Distillation method/technique to Refine Metal
A particle is projected vertically upwards the surface of the earth (radius Re) with a speed equal to one fourth of escape velocity. What is the maximum height attained by it from the surface of the earth ?
At a site, low grade copper ores are available and zinc and iron scraps are also available. Which of the two scraps would be more suitable for reducing the leached copper ore and why?
Why is the reduction of a metal oxide easier if the metal formed is in liquid state at the temperature of reduction?
Although thermodynamically feasible, in practice, magnesium metal is not used for the reduction of alumina in the metallurgy of aluminium. Why ?
Suggest a condition under which magnesium could reduce alumina
what is Limitations of Ellingham Diagram
Explain Ellingham Diagram
EXPLAIN Froth Floatation Method FOR CONCENTRATION OF ORES .