# Science

## Venn Diagrams

Venn diagrams AVenn diagram shows the relationship between sets. In a Venn diagram, a set is ‘usually represented by a circle, and the universal set by a rectangle. Elements of a· set are often represented ·by points in the circle. Each part of the diagram .is labeled and the parts being considered are shaded.

## Liquid Crystal

Liquid crystal (LC) is a state of matter with qualities that fall in between liquids and solid crystals.

A liquid crystal, for example, may flow like a liquid but have its molecules arranged in a crystal-like pattern.

Liquid-crystal phases come in a variety of shapes and sizes, each with its own set of optical properties (such as textures).

Domains where liquid-crystal molecules are orientated in opposite orientations correspond to the contrasting sections in the textures.

The molecules, on the other hand, are well organized within a domain.

It’s possible that LC materials aren’t always in a liquid-crystal state of matter (just as water may turn into ice or water vapor).

## Friction

Friction is a fundamental force that exists in the physical world and is responsible for many everyday phenomena. It arises whenever two surfaces come into contact with one another and is the reason why objects don’t just slide or slip around uncontrollably. Friction is a complex phenomenon that arises from...

## The BBC Microcomputer

The BBC Microcomputer, also known as the BBC Micro, was a series of computers developed and sold by Acorn Computers in the 1980s. The machine was designed to be used in schools and became hugely popular in the UK education system, as well as among hobbyists and home users. The...

## The University of York

The University of York is a research-intensive university located in the historic city of York, United Kingdom. It has established itself as one of the top universities in the UK and worldwide. The university has a diverse community of over 18,000 students from over 150 countries, and offers a wide...

## George Boole: The Father of Boolean Algebra

George Boole was a 19th-century mathematician and philosopher who is widely regarded as the founder of modern symbolic logic and Boolean algebra. Born in Lincoln, England, in 1815, Boole was a self-taught mathematician who developed an interest in algebra and logic at a young age. Boole’s most significant contribution to...

## The Slide Rule

This mechanical analogue computer was invented in the 1600s. The middle section of the ruler could be slid out to work out mathematical functions by reading the numbers on the scale. The slide rule, also known as a slipstick, is a mechanical device used for performing mathematical calculations. It was...

## Analogue Computers

An analogue computer is a type of computer that uses physical components and electrical signals to perform mathematical operations. These computers were prevalent from the 1930s to the 1960s and were used for a variety of applications, including scientific research, engineering, and military calculations. The earliest analogue computers used mechanical...