|
Balloon Rocket
A balloon rocket is a rubber balloon filled with air or other gases. Besides being simple toys, balloon rockets are widely used as a teaching device to demonstrate basic physics. How it works To launch a simple rocket, the untied opening of an inflated balloon is released. The elasticity of the balloon contracts the air out through the opening with sufficient force and the resulting pressure creates a thrust which propels the balloon forward as it deflates. It is usual for the balloon to be propelled somewhat uncontrollably (or fly in and unstable centre of mass), as well as turbulence that occur in the opening as the air escapes, causing it to flap rapidly and disperses air outwards in random direction. Near the end of its deflation, the balloon may suddenly shoot quickly in the air shortly before it drops down, due to the rubber rapidly squeezing out the remaining air inside as it reaches the inclination to return to its uninflated size. The flight altitude only amounts to s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toy Balloon
A toy balloon or party balloon is a small balloon mostly used for decoration, advertising and as a toy. Toy balloons are usually made of rubber or aluminized plastic and inflated with air or helium. They come in a great variety of sizes and shapes but are most commonly in diameter. Toy balloons are not considered to include " sky lanterns" (hot-air paper balloons), although these too are or were used as child toys in some parts of the world. History Early balloons were made from pig bladders and animal intestines. There are references to balloons made of whale intestine in ''The Swiss Family Robinson'' (1813) and in ''Moby-Dick'' (1851). Since the 1890s, paper balloons called kamifūsen have been popular children's toys in Japan. Health and safety issues Choking hazards According to The Journal of the American Medical Association, out of 373 children who died in the US between 1972 and 1992 after choking on children's products, nearly a third choked on latex balloon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drinking Straw
A drinking straw is a List of eating utensils, utensil that uses suction to carry the contents of a beverage to one's mouth. A straw is used by placing one end in the mouth and the other in a beverage. By applying suction with the mouth, the air pressure in the mouth drops, which causes atmospheric pressure to force the liquid through the straw and into the mouth. Drinking straws can be straight or have an angle-adjustable bellows segment. Disposable product, Disposable straws are commonly made from plastics. However, environmental concerns related to plastic pollution and new regulation have led to rise in reusable and biodegradable straws. Following a rise in regulation and public concern, some companies have voluntarily banned or reduced the number of plastic straws used. Alternative straws are often made of Reuse, reusable materials like silicone or metal or alternative disposable and biodegradable materials like paper, cardboard, pasta, or bamboo. Straws have been used sin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toy Balloon
A toy balloon or party balloon is a small balloon mostly used for decoration, advertising and as a toy. Toy balloons are usually made of rubber or aluminized plastic and inflated with air or helium. They come in a great variety of sizes and shapes but are most commonly in diameter. Toy balloons are not considered to include " sky lanterns" (hot-air paper balloons), although these too are or were used as child toys in some parts of the world. History Early balloons were made from pig bladders and animal intestines. There are references to balloons made of whale intestine in ''The Swiss Family Robinson'' (1813) and in ''Moby-Dick'' (1851). Since the 1890s, paper balloons called kamifūsen have been popular children's toys in Japan. Health and safety issues Choking hazards According to The Journal of the American Medical Association, out of 373 children who died in the US between 1972 and 1992 after choking on children's products, nearly a third choked on latex balloon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Body Inflation
Body inflation or inflation fetish is the practice of inflating or pretending to inflate a part of one's body, often for sexual gratification. It is commonly done by inserting items such as balloons, bouncy balls, or beach balls underneath clothes or a skin-tight suit and then inflating them. Some people have specially made inflatable suits, to make themselves bigger all over. One of the best-known examples is Mr. Blowup, who appears in the ''Deviant Desires'' book. He wears air-inflated double-skinned latex suits, and has made a number of TV appearances in the UK, including '' Eurotrash''. Sometimes the body is actually inflated also, such as by enema or drinking large amounts of liquid. The entire concept of body inflation is heavily associated with the feeling of being bound to one spot, or usually due to a combination of a stomach fetish with many other fetish elements. Examples Prior to becoming a fetish, the idea of one's body inflating like a balloon has been a humorous ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cartoon
A cartoon is a type of visual art that is typically drawn, frequently Animation, animated, in an realism (arts), unrealistic or semi-realistic style. The specific meaning has evolved, but the modern usage usually refers to either: an image or series of images intended for satire, caricature, or humor; or a motion picture that relies on a sequence of illustrations for its animation. Someone who creates cartoons in the first sense is called a ''cartoonist'', and in the second sense they are usually called an ''animator''. The concept originated in the Middle Ages, and first described a preparatory drawing for a piece of art, such as a painting, fresco, tapestry, or stained glass window. In the 19th century, beginning in ''Punch (magazine), Punch'' magazine in 1843, cartoon came to refer – ironically at first – to humorous artworks in magazines and newspapers. Then it also was used for political cartoons and comic strips. When the medium developed, in the early 20th century, it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adhesive Tape
Adhesive tape is one of many varieties of backing materials coated with an adhesive. Several types of adhesives can be used. Types Pressure-sensitive tape Pressure-sensitive tape, PSA tape, self-stick tape or sticky tape consists of a pressure sensitive adhesive coated onto a backing material such as paper, plastic film, cloth, or metal foil. It is sticky (tacky) without any heat or solvent for activation and adheres to surfaces with light pressure. Typical adhesives are polymers such as acrylates, natural rubber, natural, and synthetic rubber. These tapes usually require a release agent on their backing or a release liner to cover the adhesive. Sometimes, the term "adhesive tape" is used for these tapes. Water-activated tape Water-activated tape, gummed paper tape or gummed tape is starch- or sometimes animal glue-based adhesive on a paper backing which becomes sticky when moistened. A specific type of gummed tape is called reinforced gummed tape (RGT). The backing o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physics
Physics is the scientific study of matter, its Elementary particle, fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force. "Physical science is that department of knowledge which relates to the order of nature, or, in other words, to the regular succession of events." It is one of the most fundamental scientific disciplines. "Physics is one of the most fundamental of the sciences. Scientists of all disciplines use the ideas of physics, including chemists who study the structure of molecules, paleontologists who try to reconstruct how dinosaurs walked, and climatologists who study how human activities affect the atmosphere and oceans. Physics is also the foundation of all engineering and technology. No engineer could design a flat-screen TV, an interplanetary spacecraft, or even a better mousetrap without first understanding the basic laws of physics. (...) You will come to see physics as a towering achievement of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rocket
A rocket (from , and so named for its shape) is a vehicle that uses jet propulsion to accelerate without using any surrounding air. A rocket engine produces thrust by reaction to exhaust expelled at high speed. Rocket engines work entirely from propellant carried within the vehicle; therefore a rocket can fly in the vacuum of space. Rockets work more efficiently in a vacuum and incur a loss of thrust due to the opposing pressure of the atmosphere. Multistage rockets are capable of attaining escape velocity from Earth and therefore can achieve unlimited maximum altitude. Compared with airbreathing engines, rockets are lightweight and powerful and capable of generating large accelerations. To control their flight, rockets rely on momentum, airfoils, auxiliary reaction engines, gimballed thrust, momentum wheels, deflection of the exhaust stream, propellant flow, spin, or gravity. Rockets for military and recreational uses date back to at least 13th-century China. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Newton's Laws Of Motion
Newton's laws of motion are three physical laws that describe the relationship between the motion of an object and the forces acting on it. These laws, which provide the basis for Newtonian mechanics, can be paraphrased as follows: # A body remains at rest, or in motion at a constant speed in a straight line, unless it is acted upon by a force. # At any instant of time, the net force on a body is equal to the body's acceleration multiplied by its mass or, equivalently, the rate at which the body's momentum is changing with time. # If two bodies exert forces on each other, these forces have the same magnitude but opposite directions. The three laws of motion were first stated by Isaac Newton in his ''Philosophiæ Naturalis Principia Mathematica'' (''Mathematical Principles of Natural Philosophy''), originally published in 1687. Newton used them to investigate and explain the motion of many physical objects and systems. In the time since Newton, new insights, especially around t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physics
Physics is the scientific study of matter, its Elementary particle, fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force. "Physical science is that department of knowledge which relates to the order of nature, or, in other words, to the regular succession of events." It is one of the most fundamental scientific disciplines. "Physics is one of the most fundamental of the sciences. Scientists of all disciplines use the ideas of physics, including chemists who study the structure of molecules, paleontologists who try to reconstruct how dinosaurs walked, and climatologists who study how human activities affect the atmosphere and oceans. Physics is also the foundation of all engineering and technology. No engineer could design a flat-screen TV, an interplanetary spacecraft, or even a better mousetrap without first understanding the basic laws of physics. (...) You will come to see physics as a towering achievement of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
