We decided to stick with Belfast as our city as we all already did a lot of research on it, for some of us we actually live there and we can walk around and get first hand references, so there is a lot of potential.
So how do things float? There are lots of ways, realistically it can be done using water, air pressure or magnets. Fictionally the list is endless.. and usually very magical. Float: rest or move on or near the surface of a liquid without sinking. Move or hover slowly and lightly in a liquid or the air; drift. Law of Buoyancy: Archimedes' principle, physical law of buoyancy, discovered by the ancient Greek mathematician and inventor Archimedes, stating that any body completely or partially submerged in a fluid (gas or liquid) at rest is acted upon by an upward, or buoyant, force the magnitude of which is equal to the weight of the fluid. Pumice- When rocks are submerged in water, they tend to sink because of their weight. They don't float, but pumice does. Pumice is the only rock that can float on water. It is full of air bubbles and is less dense than water. People have even started using it as decoration in fish tanks, it gives the impression of a floating islands. (Source) These pieces of pumice have also been advertised to look like the floating mountains from James Cameron's Avatar. Although in the movie the mountains float based off a magnetic field. The Hallelujah Mountains from Avatar (2009) The Hallelujah Mountains (Na'vi name: Ayram alusìng meaning "Floating Mountains") are floating islands that circulate slowly in the magnetic currents like icebergs at sea, scraping against each other and the towering mesa-like mountains of the region. On Pandora, huge outcroppings of unobtanium rip loose from the surface and float in the magnetic vortices due to the Meissner Effect. The Huang Shan mountains inspired the design of these mountains. Magnets- We can also make things levitate in real life using magnets and Meissner Effect. The two primary issues involved in magnetic levitation are lifting forces: providing an upward force sufficient to counteract gravity, and stability: ensuring that the system does not spontaneously slide or flip into a configuration where the lift is neutralized.
Floating on water- Icebergs can float for many reasons. The first is due to one of water's many amazing properties: Aside from being necessary for all life (and refreshing on hot days), water is one of the few substances that is slightly denser as a liquid than as a solid. This is why ice cubes float in water. Second, and slightly more interestingly: Most icebergs actually contain a lot of air. (Like pumice!) Far from being the solid blocks of ice many people imagine, icebergs are riddled with billions of tiny, trapped air bubbles, giving the huge bergs their white appearance. Third, icebergs are made from fresh water . Because of the dissolved salts in ocean water, it is denser than freshwater, adding bouyancy to the icebergs. An object will float if the gravitational (downward) force is less than the buoyancy (upward) force. So, in other words, an object will float if it weighs less than the amount of water it displaces. This explains why a rock will sink while a huge boat will float. The rock is heavy, but it displaces only a little water. It sinks because its weight is greater than the weight of the small amount of water it displaces. A huge boat, on the other hand, will float because, even though it weighs a lot, it displaces a huge amount of water that weighs even more. Plus, boats are designed specifically so that they will displace enough water to assure that they'll float easily. Illusion of floating- A levitation illusion is one in which a magician appears to defy gravity by making an object or person float in the air. The subject may appear to levitate unassisted, or it may be performed with the aid of another object (such as a silver ball floating around a cloth) in which case it is termed a "suspension". Various methods are used to create such illusions. The levitation of a magician or assistant can be achieved by a concealed platform or hidden wires, or in smaller-scale illusions by standing on tiptoe in a way that conceals the foot which is touching the ground. References
Rest of groups blogs:
Nuala https://nualamcgarry.wordpress.com/ Charlotte https://charlottebryansart.wordpress.com/ Viola https://blog.schantalls.net/
0 Comments
Leave a Reply. |
|