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Development of the carnation flower

The carnation is considered as the national flower of Spain. Let's see how the flower...

The fox and the grapes

Having eaten his delicious chicken, the fox yearned for some grapes, but he was unable to...

Measuring the height of a tower

Calculating the height of a classic water tower with a tape measure and lots of sunshine.

Catalytic cracking

The oil industry is able to meet the world’s growing need for fuel by a process called...

Bauxite

Bauxite ore is first processed to produce alumina, which is then smelted to produce pure...

Dog tricks

Man's most loyal friend is the dog. They are excellent at guarding houses and can also be...

Ancient karst

Ancient karst is an irregular limestone terrane, buried by younger sediments or...

Thuja occidentalis

This species in the cypresses family has many uses. Native American Indians called it...

Public transport

Public transport is an indispensable service in big cities. There are means of transport...

Reflecting a circle across an axis

Axis t and a circle with centre O and radius r are given on a particular plane. Let’s...

Plotting a perpendicular to a line at a given point P on the line

Both line e and point P, which is situated on it, are given. Let’s plot line g to include...

Plotting a perpendicular on a line from a point P that is not on the line

Both line e and point P, which is not situated on line e, are given. Let’s plot line g...

Plotting parallel lines – Solution I

Let’s plot line g such that it is parallel to line e and passes through point P.

Plotting parallel lines – Solution II

Let’s construct a rhombus such that one of its sides lies on line e and point P is one of...

Since when has the dog been angry at the rabbit?

The dog and the rabbit had such a bad quarrel while chopping down trees they have been...

Unusual basalt rock formation

When lava solidifies, it sometimes forms interlocking hexagonal basalt columns. This...

Growing daffodil

The daffodil is a beautiful flower of alpine pastures and meadows. Let's see how the...

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