Explanation

Pulley is a wheel with a grooved rim around which a cord passes, which acts to change the direction of a force applied to the cord and is used to raise heavy weights.

Explanation

German Inventor Karl von Drais invent bicycle.

His machine, known as the "swiftwalker," hit the road in 1817.

Explanation

Mangoes are one of the most delicious and nutrient-dense fruits, and are known worldwide as the king of fruit. Mango is a tropical fruit that comes in as many as 1,000 varieties.

Explanation

“An apple a day keeps the doctor away.” While the phrase was first coined in 1913, it was based on a Pembrokeshire proverb that originated in 1866.

Explanation

Aerodromes are one of the most important links in the civil aviation network.

They are the key interface between the passengers and the aircraft, and the location where every flight begins and ends

Explanation

The largest of the ethnic groups in Cambodia are the Khmer, who comprise approximately 90% of the total population and primarily inhabit the lowland Mekong subregion and the central plains.

Explanation

A criminal is harassed and tortured until he confesses. This is an example of Negative reinforcement

Negative reinforcement is a method that can be used to help teach specific behaviours. With negative reinforcement, something uncomfortable or otherwise unpleasant is taken away in response to a stimulus.

Explanation

Propaganda is communication that is primarily used to influence an audience and further an agenda, which may not be objective and may be selectively presenting facts in order to encourage a particular synthesis or perception, or using loaded language in order to produce an emotional rather than a rational response to the information that is being presented

Explanation

A number of propaganda techniques based on social psychological research are used to generate propaganda.

Many of these same techniques can be classified as logical fallacies, since propagandists use arguments that, while sometimes convincing, are not necessarily valid.

Explanation

The Internet has changed business, education, government, healthcare, and even the ways in which we interact with our loved ones - it has become one of the key drivers of social evolution. The changes in social communication are of particular significance.