Question
This scientistgavethe law-‘Properties of elements are
a periodic function of their atomic number.’ This property of the fundamental importance of atomic number was discovered by-Solution
In 1913, Henry Moseley showed that the atomic number of an element is a more fundamental property than its atomic mass as described below.
If the side of square and its area is in the ratio of 7:28 then find its perimeter?
A right circular cylinder having total surface area of 44352 cm2 is immersed in a vessel completely filled with water. If the height of the c...
- The dimensions of a cuboidal box are in the ratio 8:4:3 for its length, breadth, and height respectively. If the total surface area of the box is 2,176 cm�...
The length is decreased by 18%, the breadth is decreased by 12% and the height is increased by 50%. Calculate the percentage change in the volume of the...
The curved surface area of the sphere is 154 cm2 . Find the volume of the sphere (rounded off to one digit after decimal).
Curved surface area of cylinder is 646.8 cm2. If ratio of radius to height of the cylinder is 10:4 respectively, then find the base area of t...
Sides of a parallelogram are in the ratio 4:3. Its area is 432 sq. units. Altitude on the greater side is 12 units. Altitude on the smaller side is:Â
A rectangular garden is 25 m long and 15 m wide. Find its area and perimeter.
Height of a cylindrical vessel is equal to side of a square, whose area is 324cm². Radius of cylindrical vessel is equal to average of radius of a sphe...
Find the circumference and area of a circle of radius 7 cm. Take π = 22/7.
