Not AI But Real Answers By Experts!
Suppose you are in a ship crossing the ocean, or making your way across some huge desert that has no landmarks. How could you describe your exact location so that anyone in the world could find you? That is what latitude and longitude do. They provide the means for locating a place anywhere on the … Read more
There is always some alcohol in the body. The carbohydrates starch and sugar form alcohol when decomposed, so some alcohol enters the bloodstream after every meal. There is always about a gram of alcohol in our body. But when we drink alcohol, this amount is increased. Alcohol is actually a narcotic, but a weak one. … Read more
High blood pressure involves a great many older people. It is believed that 15 to 20 percent of all deaths in the United States in people over fifty years of age are due to high blood pressure! First of all, what is blood pressure? It is the amount of pressure exerted on the blood by the … Read more
Gypsum is used to make wall-board and tiles because it resists fire and water so well and because it insulates a building against both heat and cold. The boards or blocks of gypsum can be nailed and sawed like wood. A mixture of gypsum with a little cement and certain other materials forms a light building material … Read more
The dust and other materials that are in the air as the result of a nuclear explosion—that is, from atom bombs—is fallout. It contaminates, or poisons, the air, soil, and water. Fallout contaminates the world around us because it is radioactive. This means that it contains certain kinds of atoms that are breaking down. As … Read more
Dust consists of tiny particles of solid matter that can be carried in suspension by air. Dust is usually lifted by the wind from the place it originated and is carried along by air currents until it finally settles because of gravity, or it comes down with rain. Dust is produced by a wide range … Read more
All over the world, there are people who are waging “conservation” campaigns. Conservation means many things to many people. To some, it means preserving the wilderness in certain sections. others it means preserving wildlife. Conservation includes efforts to protect forests, as well as the wise use of all-natural resources. The problem of conservation has arisen because mankind … Read more
Condensation is the opposite of evaporation. In evaporation, a liquid changes into a gas or vapor. In condensation, a gas or vapor tums into liquid or solid form. This happens when it is cooled or compressed. There are two important changes that take place when a gas condenses. The first is that the volume of … Read more
Man has followed a path towards what we consider to be “civilization”. At first, of course, in the earliest stages, man lived somewhat like the animals. He had no language, ate food where he found it and had no home. Then, at the first stage of savagery, he learned to make fire and to eat … Read more
“Force” is a push or a pull that changes the motion, or movement, of objects. When you push a chair, you are exerting force on it. When you stop pushing, the chair stops moving. But suppose you roll a ball along the ground. It keeps on rolling after you have stopped pushing it! Why? The … Read more