Weightlessness occurs when there is no force of support on your body. Free fall is when your body is effectively accelerating downward at the acceleration of gravity; here you are not being supported. The sensation you get from apparent weight (mg- mass times gravity) comes from the support that you feel from the floor or from your seat. Some examples of the sensation of apparent weight occur on a roller-coaster or in an airplane due to the fact that they are accelerating either upward or downward; like going over the very top in a rollercoaster. Weightlessness happens or is met when the downward acceleration of the set is equal to the acceleration of gravity.
No invention of the 1800's played a more vital role in the Industrial Revolution than the steam locomotive and railroad, triggering the biggest leap in transportation technology in history. The technology central to railroads, the steam engine, needed two major improvements. First of all, a way had to be found to convert the oscillating motion of the steam engine to rotary motion so it could drive the locomotive's wheels. The solution came with James Watt's Sun and Planet gear, which connected the piston to the wheels somewhat off center to drive it forward. Secondly there was a need for stronger iron so boilers could create and withstand the pressure needed to drive steam locomotives.
What is a thermal runaway reaction? Source: http://www.hse.gov.uk/pubns/indg254.htm An exothermic reaction can lead to thermal runaway, which begins when the heat produced by the reaction exceeds the heat removed. The surplus heat raises the temperature of the reaction mass, which causes the rate of reaction to increase. This in turn accelerates the rate of heat production. Thermal runaway can occur because, as the temperature increases, the rate at which heat is removed increases linearly but the rate at which heat is produced increases exponentially.
But the state of the country’s passenger rail system is another story, entirely. United States passenger transportation by rail is characterized by relatively long commuting times, dated rail cars and aging infrastructure. Many have called for a revolution in passenger railway transport. High speed rail systems, already popular throughout much of Europe and Asia, offer the promise of speedier, safer, more efficient travel. The idea is gaining traction.
We then, can assume the reason for the increasing temperature was resulted from industries, over-powering energy with coal during that specified time period. Manufacturing produces massive amounts of carbon dioxide along with other greenhouse gases, resulting in warming the whole planet, hene causes climate changes. Thus, it can be concluded that humans have a strong correlation with the increasing temperature and climate changes that are happening
The word Maglev is short for magnetic levitation, which indicates that Maglev trains practically levitate above the ground. Currently there are two methods that Maglev trains use to work. The first of these two methods is called the Electromagnetic suspension (EMS) and it was developed by German scientists. An electromagnet that's embedded into the track repels the magnets on the train's undercarriage, causing the train to levitate between 1 to 10 centimeters above the track depending on the strength of the magnet. The
Results: | | Tension (N) | a (experimental) | a (theoretical) | 0.05 | 0.05 | 0.49 | 0 | 0 | 0.05 | 0.1 | 0.65 | 3.24 | 3.27 | 0.1 | 0.15 | 1.18 | 2.07 | 1.96 | 0.1 | 0.2 | 1.31 | 3.43 | 3.27 | Analysis/Discussion: The results show that the greater the ratio of mass, the acceleration will be also greater. The hypothesis was found to be true. When both masses are the same, the acceleration (both theoretical and experimental) are indeed zero. As the ratio of the masses increased, so did the acceleration. The tension got bigger as the
For instance it takes much longer more energy to raise 1 gr. of water 1 than it does 1 gr. of silver. The equation of energy required is given as: Heat energy required (Joules) = (Mass of object) (Specific Heat)(Change in T) Or, as many book list it: Which says that the change in thermal heat energy going into an object shows up as an increase in temperature, .We have to be careful because the mass of the object we are heating is important as well. The term Cp is the specific heat of the material (at constant atmospheric pressure).
Velocity, body mass, type of shoe and type of runner are all factors that have been shown to affect ground reaction forces and were all analyzed. Body mass and velocity seem to have the greatest increase in ground reaction forces. As you increase body mass, and velocity, vertical forces increase as well and put stress on the lower body. Decreasing these factors may prove to decrease injuries and stress fractures. The load of the body during running can be described using ground reaction forces.
In the case of α-phase FePO4, cell parameters tend to increase exponentially as temperature increase. The volume of the metal has the tendency to increase exponentially as well. It is governed by thermal expansion coefficient α (K-1)= 2.924 x 10-5 + 2.920 x 10-10 (T-300)2. There are two factors that affect the thermal expansions: 1. Angular variations due to the changes of Fe-O-P bridging angles.