4to40.com

Who discovered comets? How is the tail formed?

Comets have been known to mankind since eons, hence it cannot be said that comets were discovered by any single individual. A comet, like planets and asteroids, orbits around the sun – with the orbital period varying from a few years to thousands of years. A comet is formed of rock, ice, dust and a few frozen gases like carbon …

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Who came up with the concept of vacuum?

In earlier civilizations, there was much doubt about whether vacuum can exist. Ancient Greeks also did not believe vacuum is possible. In the medieval Islamic world, physicist Ibn al-Haytham supported the existence of a void or vacuum. He mathematically demonstrated that place (al-makan) is the imagined three-dimensional void between the inner surfaces of a containing body. The first suction pump …

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Mohammed Bin Rashid Al-Maktoum

Mohammed Bin Rashid Al-Maktoum, also Sheikh Mohammed was born July 22, 1949, is the Prime Minister and Vice President of the United Arab Emirates (UAE), and Ruler of Dubai. Personal Life & Education He is the third of Rashid bin Saeed Al Maktoum’s four sons (members of Dubai’s ruling family Al Maktoum and descendants of the House of Al-Falasi, of which …

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Who are the tallest and shortest people?

The Tutsi of Burundi and Rwanda, who are noted for their dancing and high jumping, are, on average, the world’s tallest people. Men over 183 cm (6ft) in height. The world’s shortest people also live in Central Africa. These are the pygmy hunters and gatherers in the forests. Pygmy women average only 135 cm (4ft5in) and men 137 cm (4ft6in)!

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Who are NEO consumers?

The NEO consumers are new high-value consumers of the new economic order (NEO). It is a newly emerging segment of customers from all age groups, ethnicities, income bands, locations and have high propensity to spend their income on disposable goods. NEO consumers are valuable as they consume constantly and favour a sense of investment, discretionary choices and value added services. …

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Which was the largest battleship ever built?

The greatest of the fighting giants of the sea was the Japanese Yamato. She gave her name to a class four battleships designed to be invincible. Yamato displaced 72,000 tons. Her main armament consisted of nine 45.9 cm guns in triple turrets – overwhelmingly superior to any other battleship in the world. The Yamato was completed soon after the Japanese …

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Which was the first public railway worked entirely by steam locomotive?

On 15 September 1830 a train steamed slowly from Liverpool along the new ‘iron road’ to Manchester – the first in a procession of eight locomotives. The occasion was the opening of the Liverpool and Manchester Railway, the first railway in the world to carry goods and passengers. Cheering crowds greeted the Duke of Wellington as his luxurious coach was …

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