Questions

The first written story that has come down to us is The Epic of Gilgamesh.

It is a mythologized account of a historical figure, Gilgamesh, a ruler of the Sumerian city-state of Uruk, believed to have ruled sometime between 2700-2500 BC.

The Sunglasses. 

It protects us from the sunlight and it sits on the bridge means hangs on our ears and nose. Only who keeps that can see through it and others wonder what he is watching.

Lines are used in art to indicate

a. boundaries between forms.
b. direction and motion.
c. shadows and highlights.
d. spatial depth on flat surfaces.

The world's fastest elevator that can operate at a record speed of 1,260 meters per minute is set to be installed in a skyscraper complex in China. The elevator has various safety features including brake equipment that uses materials with high heat resistance. Apart from this, the elevator can absorb vibration during the high-speed operation to make the ride comfortable.

Many carbohydrates contain one or more modified monosaccharide units that have had one or more groups replaced or removed.

Chitin is one of many naturally occurring polymers. It is one of the most abundant natural materials in the world. Over time it is bio-degradable in the natural environment. Its breakdown may be catalyzed by enzymes called chitinases, secreted by microorganisms such as bacteria and fungi, and produced by some plants.

Chitin is composed of repeating units of N-acetylglucosamine, a nitrogen-containing form of glucose.

The outer most electrons that are free to move are called valency electrons that are responsible for the conductivity in the metal atoms.