Science & Mathematics Questions & Answers

Soldiers wear khaki for camouflage, of course, to ensure that they blend with their background and make them less easily spotted by their enemies. In early times camouflage was not so important to soldiers; fighting at that time was usually hand to hand, and distinctive uniforms were necessary so that the combatants could discriminate between friend and foe. The uniforms …

Do you like fruits? Have you ever wondered why plants produce fruits? Is it only because nature wants you to enjoy eating its fruits and sing its praises? The answer is no. Plants are much smarter than what you think they are. They actually use human beings, animals and birds who eat their fruits to propagate their kind. In other …

May be because due to fear of something our body gets heated either due to increase in over all blood pressure or increased flow of blood into necessary parts of our body. So to cool down our body we starts sweating. Its a natural way of human body to maintain the body temperature into a specific buffer zone.

People study cybernetics to gain knowledge with which to improve mechanical things. Cybernetics is the scientific study of automatic control and communication in the functions of animals and in mechanical and electrical systems. It is chiefly concerned with physiological and psychological mechanics of animal behaviour. These methods have been used in deciphering garbled messages, in anti-aircraft gunnery, in constructing artificial …

It is Uvula (OOV-YOU-LA), a small piece of flesh at the back of the throat that hangs down from the roof of the mouth. Sometimes we take air from lungs and this makes uvula to vibrate and that’s the snoring sound. It happens most often when we breathe through our mouth.

Like all other mammals, human beings have hair on their bodies. The chief job of this hair is to retain the body’s heat, so that we do not die of cold. A man grows hair on his face and not so much on the top of his head, while a woman has more hair on her head and far less …

The hold doors are on the right, so with the baggage being loaded/unloaded and re-fuelling taking place, it would be pretty crowded and dangerous. Also on older aircraft, the forward right hand doors were actually designated service doors and emergency exits only. Besides, the left side of the aircraft is where the pilot sits, with the co-pilot in the right-hand …

For sub-atomic particles like electrons and protons, there exist corresponding particles with the same mass but opposite electrical and magnetic characteristics. For example, the electron’s anti-particle, positron, possesses the same mass as the electron, but carries a positive charge. The anti-particles are produced naturally in radioactive decay. In the universe, the number of regular subatomic particles and anti-particles is not …

When our faces turn red because of some act that we know to be wrong, it is probably because we are ashamed. Another reason for blushing, as it is called, may well be from anger or shyness. All these emotions disturb the nervous system which controls the flow of blood to the surface of the skin and it is then …

Oil and water do not mix because the molecules (tiny particles) of which they are composed are so different. The molecules in oil are much bigger and contain many more atoms than those of water. When different liquids mix, it is because they have similar types of molecules which readily link up with each other, like milk and water. In …