Remembering the historical past of the atomic fashions and their respective names may be troublesome, nevertheless it’s an essential a part of understanding chemistry. This is a useful approach to keep in mind them:
Dalton’s Mannequin (1803): Billiard balls
How To Bear in mind The Branches Of The Belly Aorta is a mnemonic utilized by medical college students to assist them keep in mind the order of the branches of the belly aorta. The mnemonic is “ROY G. BIV BOD MAS“, which stands for:
Renal arteries Ovarian/testicular arteries Yliac arteries Gastric arteries Branches to the intestines Inferior mesenteric artery Visceral arteries Bronchial arteries Opsychological arteries Duodenal arteries Middle colic artery Arch of Riolan* Sacral arteries
The unit circle is a circle with radius 1, sometimes drawn within the coordinate aircraft with its heart on the origin. It’s a elementary idea in trigonometry and is used to outline the trigonometric features sine, cosine, and tangent. There are a number of methods for remembering the unit circle, which could be useful for college students and professionals in arithmetic and associated fields.
One widespread methodology is to make use of the acronym SOHCAHTOA, which stands for sine is reverse over hypotenuse, cosine is adjoining over hypotenuse, and tangent is reverse over adjoining. This can assist you to recollect the definitions of the trigonometric features and the way they relate to the unit circle.
