... , or traveling at 500000 kilometers per second, the two measurements would be the same. This has a very unusual consequence. Consider this experiment. A person A is observing a train traveling close to the speed of light. Person B is traveling in the train. Person B sends a beam of light from the floor to the ceiling and it reflects back down. If the ceiling is two meters ... true because of the last experiment mentioned. But, as was shown by Einstein, the difference between classical and relativistic physics becomes noticeable only at speeds, which are close to the speed of light. So, t...

• Word Count: 3720
• Approx Pages: 15
• Grade Level: High School

... Brownian motion in cars, buildings, or people. In 1900, F.M. Exner undertook the first quantitative studies, measuring how the motion depended on temperature and particle size. And he found that the speed of movement increased with a rise in temperature, but then, it decreased if bigger particles were used in the observation. The first truly reasonable explanation of Brownian movement came in 1877 ... and complicated so often and so rapidly that it is pretty much impossible to follow them. Similarly, the apparent mean speed of a grain during a given time varies in the most absurd manner...

• Word Count: 1615
• Approx Pages: 6
• Has Bibliography
• Grade Level: High School

... is in the part of the spectrum called microwaves. It corresponds to a temperature source of about 2.7 Kelvin's (about -271.35 degrees Celsius). This is just barely above the ultimate lower limit of temperature called absolute zero. This is the point at which all molecular motion ceases. It is unattainable, however. This radiation was measured by the COBE (Cosmic Background Explorer) satellite ... universe? Well, there are 3 possible things that could happen; One is the idea that the mass in the universe will use gravity and reverse the big bang. Another is the speed of the universe's ex...

• Word Count: 1082
• Approx Pages: 4
• Has Bibliography
• Grade Level: High School