... of physics. Therefore, I have come to state that physics is considered as “a body of knowledge and as the practice that makes and transmits it. The growth of physics has brought not only fundamental changes in ideas about the material world, but also, through technology based on laboratory discoveries, a transformation of society.” Uncertainty in Measurements Because the number of digits that are valid for any measurement is limited, the precision of all measuring devices is also limited. Every measurement is subject to uncertainty. Causes of uncertainty: 1. temperature 2. magnetic fields 3. parallax 4. carelessness Chapter 3: General Principles of Temporal ...
Words: 2017 - Pages: 8
... primitive forms. Plant organs are organized into three kinds of organs: roots, stems, and leaves. Roots anchor the plant into the ground and they also gather minerals and water from the ground. Roots usually grow under ground and downward. Roots have tiny “hairs” which increase the surface of the roots, which results in more gathering of minerals and water. Stems are usually above ground, grow upward, and usually have leaves. Plants that do not have leaves generally use the stem as the photosynthetic surface, like cacti. Leaves are still the most common photosynthetic surface on plants, though. Leaves absorb carbon dioxide and release oxygen. Some l ...
Words: 611 - Pages: 3
... From outside the storm area, air moves in over the sea surface to replace the air soaring upwards in the thunderheads. The air begins swirling around the storm center, for the same reason that the air swirls around a tornado center. As this air swirls in over the sea surface, it soaks up more and more water vapour. At the storm center, this new supply of water vapor gets pulled into the thunderhead updrafts, releasing still more energy as the water vapor condenses. This makes the updrafts rise faster, pulling in even larger amounts of air and water vapor from the storm's edges. And as the updrafts speed up, air swirls faster and faster around the storm cent ...
Words: 594 - Pages: 3
... bathing more persistently. Pastuer opened the doors to a series of new remedies and discoveries. Some of these would include pasteurized milk(you can see where it received it's name), bacteria, fermentation, yeast, and rabies:to name a few. Within a year of Pasteur's remedy for rabies, he treated and cured maore than 2,000 patients. A German pathologist named Robert Kock (1843-1910) studied a disease called diptheria. Koch learned htat diptheria bacteria or bacilli could only be found in samples from a patients throat. Although Koch could not understand how diptheria was somehow affecting the victim's heart. Finally, Koch concluded that the bacilli produced a toxi ...
Words: 419 - Pages: 2
... rings around them. Jupiter, the first of , reigns supreme throughout the solar system. Named after the Roman god Jove, the ruler of Olympus; Jupiter is the fifth planet from the sun and is also the largest planet in the Earth’s solar system. It is 318 times more massive than Earth and is two thirds of the planetary mass in the solar system. Jupiter’s surface, unlike earth, is gaseous and not a solid. It is about 90% hydrogen and 10% helium with traces of methane, ammonia, water and rock. Jupiter’s interior is very similar to the Sun’s interior but with a far lower temperature. However, it is still unknown but Jupiter is believed to have a core of liquid meta ...
Words: 2883 - Pages: 11
... Comparative immunologists studied the immune defenses of past and current creatures. They gained further insight into how immunity works. The most basic requirement of an immune system is to distinguish between one's own cells and "non-self" cells. The second job is to eliminate the non- self cells. When a foreign object enters the body, several things happen. Blood stops flowing, the immunity system begins to eliminate unwanted microbes with phagocytic white blood cells. This defensive mechanism is possessed by all animals with an innate system of immunity. Innate cellular immunity is believed to be the earliest form of immunity. Another form of innate im ...
Words: 1152 - Pages: 5
... travel first in a northwestern direction and in the higher latitudes turn toward the northeast. In the Southern Hemisphere the usual path of a hurricane is first to the southwest and then turning toward the southeast. are characterized by strong winds and pouring rain. Thunderstorms and waterspouts appear in the storm's cloud system. All contain an eye. The eye of a hurricane is a low pressure, calm area in the middle of the storm. The air in the eye is sinking and this causes there to be no rain in this area and little wind. This gives the impression that the storm has passed through. It is not safe yet though. Within a few hours depending on the size o ...
Words: 907 - Pages: 4
... to volcanism and erosion. Mars is similar to our moon in the southern hemisphere. This region is referred to as the “Highlands” of Mars. The area is pitted with numerous craters that reach between one to four km above the datum. Ejecta from the impact scatter around the crater making a rim like structure. The northern hemisphere is very low compared to the southern hemisphere. In the north the ground level rarely reaches above one km below the datum. This stark contrast between north and south is thought to have happened 3 Gyr ago. The south was continuously bombarded with meteors. The north would get hit but it would erode or volcanic flows ...
Words: 1330 - Pages: 5
... home. But there are still many questions left open. The most recent of NASA’s plan, is this... They’ll use 3 different space ships: A habitat lander, a cargo lander, and a crew transport vehicle. The CTV carries them to the habitat lander. They land on Mars, and do their business. When they’re done, the habitat lander takes them back up to orbit where they meet back up with their CTV, waiting patiently in orbit, that takes them back home. The money issue is being handled in many different ways. The most successful plan so-far is the ThinkMars plan. Students at MIT and Harvard are setting up a for-profit corporation which they contract out various tasks to ...
Words: 742 - Pages: 3
... reshape the future of our society. The sources of these feelings were complex, but usually centered around the basic fact that this technique would permit human procreation in an asexual manner, would allow for an unlimited number of genetically identical offspring, and would control over the genetic profile of our children (Hopkins, 8). Eugenics is accomplished through a field of science known as eugenics, which basically is an attempt to improve the human race. Advances in eugenics have only helped mankind in pushing forward to a greater civilization, a more perfect evolution (Silberner, 5). When new innovations in science are not encouraged but prohibi ...
Words: 2787 - Pages: 11
