… because it expands when it is frozen. As a liquid is cooled down the molecules move more slowly allowing the attractive forces between them to become stronger. Eventually, these forces become strong enough to hold the molecules in a fixed position…

… notes devised from the board of studies syllabus. topic 1 a) identify waves as carriers of energy A wave is a periodic disturbance which travels through a medium and carries energy from one place to another. As the wave travels through the medium,…

… attitude variables of 'intention to leave the organisation', 'stress' and 'work overload' so that higher scores on these tests would represent more positive answers, e.g. score 5 in 'intention to leave organisation' will become 'definitely intend to…

… not kid ourselves; the majority of us use Windows. I, for example, have been with Microsoft since Windows 3.0. I have dabbled with Linux for years, including versions of Mandrake, Red Hat, Lindows, and Corel Linux. But I am far from being a…

… demonstrate osmosis. Osmosis is the diffusion of water across a selectively permeable membrane (Bell et al 2004). Osmosis is the movement of water molecules from an area of high concentration to an area of low concentration (Brown 1999). Hypertonic is…

… It is defined a group of individuals, related by blood, marriage, adoption or cohabitation (AIFS, 2001). In all known societies the family has the function of regulating sexual behaviour and reproduction, of socialization, of protecting children and…

… most deadly natural disaster in the World. Earthquakes are caused by sudden movement of rocks under the earth's surface. Rocks respond to stress (squeezed or pulled apart) near the earth's surface by breaking. The land around the fault may shirt…

… Einstein's famous E = mc^2 alone makes him worthy of a special place in human history, since that equation fundamentally changed the way many people think of the universe we live in. Distance and time seem to be absolutes, not capable of change.…

… strips of bacteria in his/her urine. Chlamydia infection is a curable sexually transmitted disease (STD), which is caused by a bacterium called Chlamydia trachomatis. You can get genital Chlamydia infection during oral, vaginal, or anal sexual contact…

… the heat so well, you can't see one in inferred vision. This is good because the retention of heat keeps it permanently warm. It does not lose body heat as other animals and people do, and it would not be recognised by an inferred scanner, such as…