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This must be the world's most famous equation. But what is it and what does it mean?
Popularly, it is Einstein's formula of relativity. More precisely it is a part of his theory of special relativity. It says that the energy (of a body) equals the product of the mass (of the same body) and the square of the speed of light.
Who was the Sultan who was the legendary opponent of Richard Cœur-de-Lion (Richard Lionheart). This Sultan founded a de facto Empire, covering Egypt, Syria, Mesopotamia and Yemen.
His name please?
His name was Salāh ad-Dīn Yūsuf ibn Ayyūb [صلاح الدين يوسف بن ايوب], in the West popularly called “Saladin”. He founded the Ayyubid dynasty, which ruled Egypt (and more) from 1174 to 1254, when the Ayyubids were officially replaced with the peculiar Mamluks.
You have all heard about the famous Templars – the most famous knights in Christendom. Sometimes one can see the popular name of their order misspelt. So, how should it be, where should it be “s”? Of the expressions below, only one is correct; which one?
The Knight Templars
The Knights Templars
The Knights Templar
The last is the correct spelling: “Knights Templar”.
In the front of the body, in the middle, below the ribs. It is a complex system of nerves, radiating out like a sun (from which the name derives). “Gut feeling” comes from nerves and ganglia in solar plexus.
Popularly, the region around is sometimes called solar plexus, as in a case of receiving “a blow to the solar plexus”, but strictly, scientifically, the name applies only to the network of nerves and ganglia. However, if we should be really scientific, the latter is more correctly referred to as “celiac plexus”.
If you eat green potatoes, you risk to be poisoned, which in extreme cases can lead to death. What is the poison present in green potatoes called?
The poison is solanine, and it is naturally present in all plants of the nightshade family. The family includes several plants of which parts are used for food, such as potato, tomato, eggplant, goji berries, bell peppers, paprika, cayenne and chili pepper (and related peppers), ...
Some people are allergic to nightshades and must avoid them. However, there is no general reason to avoid them because of solanine, the levels are normally too low to be harmful. The exception is potatoes being green. The green colour is not solanine, it is chlorophyll, but they develop in the same time. So, if a potato is exposed to sunlight, it develops chlorophyll and becomes green, and then its normally low level of solanine increases as well. The rule is, never eat a potato of which a part is green.
And now some new exercises for brain & memory...
Let's have a theme again. This time all answers are numbers. All questions ask “how many” something.
How many seats has the Swedish Academy, the body appointing the winner of the Nobel Prize in literature? I ask for seats, not members, because seats are sometimes vacant – so another way to ask the same would be to say: how many members do they have if no seat is vacant?