minimum radius ratio

For the stability of an ionic compound, each cation should be surrounded by maximum number of anions and vice versa. The number of oppositely charged ions surrounding each ion is called its co-ordination number. The larger is the size of the cation the greater is its coordination number. In other..

The radius of the cylinder is equal to the radius of the sphere in the figure. What is the ratio of the surface area of the sphere to the surface area of the cylinder? => 2 : 5 or 1 : 2 or 1 : 4 or 1 : 3..

What is the ratio of the surface area of a sphere with radius 1 in. to the surface area of a sphere with radius 2 in.? => 3 : 2 or 1 : 5 or 1 : 4 or None of the above..

Ratio of Intensities at Maxima and Minima - It has already been proved that the intensity of a wave is proportional to the square of the amplitude. At a point where constructive interference has occurred, the intensity will be maximum and the amplitudes of the two waves will have added. I..

The line graph represents the number of cars (in millions) imported between the years 1996 and 2000. Find the ratio of the maximum imports of cars to the minimum imports of cars. => 5 : 2 or 1 : 5 or 2 : 5 or 5 : 1..

What is the ratio of volumes of a cone of radius 28 cm and height 42 cm to a cylinder of radius 7 cm and height 14 cm? [Take π = 3.] => 16 : 1 or 22 : 1 or 21 : 1 or 24 : 1..

Derivation of the Relationship Between Radius r of the Octahedral Void and the Radius R of the Atoms in the Close Packing. A sphere fitting into the octahedral void is shown by shaded circle. A sphere above and a sphere below this small (shaded) sphere have not been shown i..

The ratio of the area of the sector of a circle to the length of its arc is equal to => the diameter or half the diameter or the radius or half the radius..

Find the ratio of the total surface area of a hemisphere to its volume. Let r be the radius of the sphere. => 1 2r or 2 r or 9 2r or 3 2r..