Essays Tagged: "Radiation"

The Big Bang Theory

ntly exploded into being, in anevent called the Big Bang. Before the Big Bang, all of thematter and radiation of our present universe were packed togetherin the primeval fireball--an extremely hot den ... om whichthe universe rapidly expanded.1 The Big Bang was the start oftime and space. The matter and radiation of that early stagerapidly expanded and cooled. Several million years later, itcondensed i ...

(5 pages) 281 0 4.5 Dec/1996

Subjects: Science Essays > Astronomy

The Big Bang (comparisive of two major theories)

tly exploded into being, in an event called the Big Bang. Before the Big Bang, allof the matter and radiation of our present universe were packed together in the primevalfireball -- an extremely hot d ... om which the universe rapidly expanded. TheBig Bang was the start of time and space. The matter and radiation of that early stagerapidly expanded and cooled. Several million years later, it condensed ...

(4 pages) 172 1 4.1 Apr/1996

Subjects: Science Essays > Astronomy

Comets

ew comets with telescopes. When a comet gets near the sun it becomes very visible because the sun's radiation starts to sublime its volatile gases, which, in turn, blow away small bits of the little s ...

(8 pages) 129 0 3.6 Feb/1997

Subjects: Science Essays > Astronomy

Global Warming

itish scientist did anexperiment showing that the carbon in the air was absorbing some of the sun's radiation.Afterward a Swedish scientist, Suante Arrhenius, found out if the radiation of the sun was ... etting hotter is that human activities are emitting toomuch carbon dioxide into the atmosphere. The radiation from the sun gets trapped in thebag of carbon dioxide that surrounds our earth.One main re ...

(9 pages) 663 0 4.6 Jan/1996

Subjects: Science Essays > Environmental Science

The Potential Effects of a Depleted Ozone Layer

light. For ' millions of years ozone has been protecting the earth ' by absorbingultraviolet or bad radiation from the sun ( Rowland, 1992, p.66 ). This natural umbrellaprotecting mankind has recently ... eas affected by a depleted ozone layer and thus by the corresponding increase in harmfulultraviolet radiation are agriculture, wildlife, the environment, and human health. Adepleted ozone layer has a ...

(9 pages) 177 1 4.6 Jan/1997

Subjects: Science Essays > Environmental Science

Big Bang

ntly exploded into being, in anevent called the Big Bang. Before the Big Bang, all of thematter and radiation of our present universe were packed togetherin the primeval fireball--an extremely hot den ... om whichthe universe rapidly expanded.1 The Big Bang was the start oftime and space. The matter and radiation of that early stagerapidly expanded and cooled. Several million years later, itcondensed i ...

(5 pages) 154 0 3.9 Dec/1996

Subjects: Science Essays > Physics

Potential Effects of a Depleted Ozone Layer

light. For ' millions of years ozone has been protecting the earth ' by absorbingultraviolet or bad radiation from the sun ( Rowland, 1992, p.66 ). This natural umbrellaprotecting mankind has recently ... eas affected by a depleted ozone layer and thus by the corresponding increase in harmfulultraviolet radiation are agriculture, wildlife, the environment, and human health. Adepleted ozone layer has a ...

(9 pages) 160 0 4.9 Jan/1997

Subjects: Science Essays > Environmental Science

Luminescence of Black Light

e Ultra-Violet Spectrum that is invisible to our eyes. We cannot distinguish it. However, when this radiation impinges on certain materials visible light is emitted and this isknown as 'fluorescence.' ...

(2 pages) 39 0 4.3 Nov/1996

Subjects: Science Essays > Physics

Nuclear Power

to treat diseases. Pacients suffering from cancer can then be exposed to the healing effects of the radiation under controlled conditions. The radiation of the nuclear energy can help in medical tests ...

(2 pages) 94 0 3.2 Jan/1996

Subjects: Science Essays > Physics

Chernobyl Nuclear Power Plant Disaster

6, 1986, was the biggest nuclear accident in nuclear history. It caused thousands of deaths through radiation and the sickness induced by it. Thirty three of those deaths were almost immediate, and th ... died. In fact, all of the people involved in fighting the fires in the Plant were hospitalized for radiation overdose treatment. Fortunately, most of them lived. But, in another country this sort of ...

(10 pages) 182 0 3.9 Jan/1996

Subjects: Science Essays > Physics

Radios, and how they work

nder and receiver. Radio, on the other hand, requires no such physical connection. It relies on the radiation of energy from a transmitting antenna in the form of radio waves. These radio waves, trave ... e electromagnetic spectrum, which includes radio waves, X rays, and gamma rays (see electromagnetic radiation).Heinrich Hertz, in the late 1880s, actually produced electromagnetic waves. He used oscil ...

(12 pages) 120 0 2.6 Mar/1996

Subjects: Science Essays > Technology

The Big Bang theory

ntly exploded into being, in anevent called the Big Bang. Before the Big Bang, all of thematter and radiation of our present universe were packed togetherin the primeval fireball--an extremely hot den ... om whichthe universe rapidly expanded.1 The Big Bang was the start oftime and space. The matter and radiation of that early stagerapidly expanded and cooled. Several million years later, itcondensed i ...

(5 pages) 121 1 3.4 Jan/1996

Subjects: Science Essays > Physics

The Atmospheric Ozone Layer

concern. Any loss or destruction of the stratospheric ozone layer could mean greater amount of UV-B radiation would reach the earth, creating among other problems, an increase in skin cancer (melanoma ... be. The loss of ozone above the tropics and mid-latitudes, and the resultant increase in harmful UV radiation could be disastrous to the earth's population if the changes were major. Since the late 19 ...

(10 pages) 97 0 2.8 Apr/1995

Subjects: Science Essays > Environmental Science

The Sun

annot burn at the low temperatures associated with hydrogen fusion. Without the outward pressure of radiation from the nuclear reactions, the core of the Sun will start to shrink. With the inward crus ... matter, the remaining hydrogen around the core heats up enough to begin a new phase of fusion. The radiation produced slowly pushes the outer layers of the Sun out once more. As the Sun now reaches a ...

(2 pages) 108 0 3.5 Nov/2002

Subjects: Science Essays > Astronomy

Nuclear energy

sical, chemical, or nuclear, is manifested by the system's ability to do work or to release heat or radiation. The total energy in a system is always conserved, but it can be transferred to another sy ...

(1 pages) 45 0 4.2 Apr/2003

Subjects: Science Essays > Technology

Theory of Knowledge.

desire for knowledge into possible effects on human health, such as the BSE crisis or the levels of radiation from mobile phones, has led to the public demanding the truth. Truth can also be applied t ...

(5 pages) 106 0 4.6 Apr/2003

Subjects: Social Science Essays > Sociology

The Ozone Layer.

small amount of ozone plays a key role in the atmosphere. The ozone layer absorbs a portion of the radiation from the sun, preventing it from reaching the planet's surface. Most importantly, it absor ... , winds drive the CFCs into the stratosphere.The CFCs are so stable that only exposure to strong UV radiation breaks them down. When that happens, the CFC molecule releases atomic chlorine. One chlori ...

(4 pages) 56 0 1.0 Jul/2003

Subjects: Science Essays > Environmental Science

Atomic Energy: Good and Bad; explains the pros and cons of atomic energy and whether the good outweighs the bad.

eak havoc upon mankind. Fission, or the splitting of atoms, can be used to release extreme heat and radiation. During World War II, the United States decided that this would be a powerful weapon, so t ... he world viewed nuclear bombs as dangerous new weapons that could devestate entire cities.Also, the radiation released from nuclear fission is harmful to living organisms. In 1986, a steam buildup in ...

(2 pages) 77 1 3.8 Sep/2003

Subjects: Science Essays > Technology

Conceptual Rocket Propulsion Systems.

th normal matter, both particles are completely annihilated, releasing pure energy and shooting off radiation at the speed of light. For this reason, Matter-antimatter propulsion would be the most eff ...

(3 pages) 59 1 3.9 Nov/2003

Subjects: Science Essays > Engineering

This Essay is based on detailed facts on Cancer.

0 and currently, it's at an all time high of 140-150. There are many new treatments (chemo-therapy, radiation, etc), but the numbers keep rising. If this trend continues, cancer will become the leadin ...

(4 pages) 70 1 4.3 Dec/2003

Subjects: Science Essays > Biology