.... TV signal can carry as many as 19.4 megabits of data, which means a broadcaster can mix multiple programs of varying bit sizes onto a single channel. Say you’re watching a football game, since one camera view only uses up so many bits, you can select a different camera angle while watching the same game on the same channel. It is possible for a network, like NBC, to show two different programs at the same time on the same channel. Conceivably, if the president in on, you can watch regular scheduled programming. With the introduction of the digital TV, the introduction of We .....

.... are found in waves of any type, from radio frequency waves, up to Gamma and X- rays. Light, however, also exhibits qualities characteristic of particles such as neutrons and protons. A photon, or quanta, is the "packet" of energy that is sent in a light wave. Like a particle, the photon is believed to have a finite mass, and has the ability to affect other matter. As light strikes a photovoltaic solar cell, it knocks electrons in the silicon atoms on the surface into a higher state of energy. When these return to their normal, or "ground" state, energy is prod .....

.... find between 2,000 to 2,500 minerals in the earths crust. Minerals are formed in a positive response to their environment, most of them to deep for an observer. Environments in which minerals are formed far beneath the earths surface are plutonic igneous, pegmatitic, hot temperature vein, moderate temp. vein, low temp. vein, and a metamorphic environment. Environments in which minerals form near the earths surface are groundwater, weathering, and sedimentary. Minerals are divided into groups on the basis of their composition. About one third of all mineral belong to the gro .....

.... ill. Not only the Greeks believed in the evil spirit theory, writings from the early Babylonian, Egyptian, and Chinese civilizations have also shown evidence that was believed to be a possession by demons-using beatings, restraint, and starvation to try to drive out the evil spirits. These beliefs somewhat cooled down as time continued to move on, but once again popped up as America was starting to be formed. In 1692 and 1693 the Salem witchcraft trials began. At this point in time was suggested to be associated with the devil, so those with es were thought to be witches. .....

.... strip of land that extends for more than 6000 kilometres across the southern edge of the Sahara desert. It stretches from Senegal and Mauritania in the west to Ethiopia and Somalia in the east. These nations are among the world's poorest. The area is one of social and biophysical crisis because of the way the population are forced to live; they are destroying the productivity of the land. The alarming rate of population growth and ever increasing pressure on the land have initiated an expansion of desert-like conditions into the Sahel - a process called desertification. Tra .....

.... to gain much insight into the sea otter ecological role in kelp-forest ecosystem. Over the years it's been possible for us to observe the kelp-forest ecosystem over-time, thanks to the massive growth of the sea otters population we observed the change from otter- free to otter-dominated. This article relates to many aspects of our textbook. On page 89 in chapter 5 the text explains what an ecosystem is, defined by the book, it's a community of species interacting with one another where there is a non-living environment. In this case the otter and kelp-forests ecosystems .....

.... not happen. With every industry, every aspect is carefully debated and analyzed for the short and long term outcomes. Any industry that capitalizes on earth's resources figuratively signs a pact with the earth. This pact bonds this industry to the earth and requires that any harvesting of resources is not done so with haste and waste. There is a symbiotic relationship between the two. For the industry to exist there must be a constant supply of the resource. Without a constant supply the industry dies. Now, many people believe that the logging industry's objective is .....

.... Namibia to Bird Island in Algoa Bay. At one time the population of the African Penguin was quite large but some man caused factors has drastically reduced their species. A long time ago the early European settlers at the Cape of Good Hope realized that penguin eggs were good for eating and over the years millions of penguin eggs have been collected greatly reducing the population of the African penguin species, and even to make things worse they started the practice of destroying any incubated eggs so that there would be fresh ones when these collectors paid their next .....