![]() ![]() pdf document) about chiken's feather and contains a lot of considerations about density. A stading up jumper ill fall a lot faster.Īfter some discussion on the buoyance effect I searched a while about a bird's feather density, a value not easy to get. Two cars, same shape, the one with the most potent engine can accelerate more and reach a greater max velocity.Īnother Example: Skydivers usually dresses something to increase air drag and stands in a position to help the drag to lower the terminal velocity and increase the fall time. The same principle is applied to race cars. That's why the lead feather ill accelerate faster and reach a bigger terminal velocity. That stronger pull helps to overcome the increasing drag opositing force. Air drag is counter acting that movement and is proportional to the velocity (in a very complex way, references here and here) Gravity is acting in both feathers the most massive receives a stronger pull to down. This analysis, as anticipated, may fail spectacularly if one takes into consideration that an asymmetric object in general rotates in a chaotic fashion if it exceeds certain threshold angle, which can be said to depend on the density, cf. Also, we assume that wind currents and turbulence are negligible, another assumption that may change the result in real conditions significantly. ![]() Thus, $$m \dot$ with $A$ the cross-section, indicates that the effect of the cross-section on the speed is much more important than that of the different masses. The problem is that the field of negative energy is so small, the laser so precise, that even the smallest seismic motion of the Earth can throw off the results.A good approximation of the drag force for an object falling through the atmosphere is $-cv^2$, with $c$ a constant independent of mass. White and his team have been at work for a few months now, but they have yet to get a satisfactory reading. redshifted, in any way, they'll know that it passed through a warp bubble. The researchers will then compare the two beams, and if the wavelength of the one going through the vacuum is lengthened, i.e. To see if space-time distortion has occurred in a lab experiment, the researchers shine two highly targeted lasers: one through the site of the vacuum and one through regular space. Distorting these waves creates negative energy, which possibly distorts space-time, creating a warp bubble. This process relies on the Casimir effect, which states that a vacuum is not actually a void instead, a vacuum is actually full of fluctuating electromagnetic waves. Nevertheless, it's thanks to "Star Trek" that the word "warp" is now practically synonymous with faster-than-light travel.Īccording to Alcubierre's theory, one could create a warp bubble by applying negative energy, or energy created in a vacuum. In other words, matter-antimatter collision is a potentially powerful source of energy and fuel, but even that wouldn't be enough to propel a starship to faster-than-light speeds. When matter and antimatter collide, their mass is converted to kinetic energy in keeping with Einstein's mass-energy equivalence formula, E=mc 2. Antimatter was a popular field of study in the 1960s, when creator Gene Roddenberry was first writing the series. They tried to explain the ship's faster-than-light capabilities by powering the warp engine with a "matter-antimatter" engine. ![]() The original " Star Trek" series ignored this "universal speed limit" in favor of a ship that could zip around the galaxy in a matter of days instead of decades. Īccording to Einstein's theory, an object with mass cannot go as fast or faster than the speed of light. Maybe the warp drive on "Star Trek" is possible after all. In fact, scientists at NASA are right now working on the first practical field test toward proving the possibility of warp drives and faster-than-light travel. ![]()
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