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These plans are for the construction of a machine called a Savonius wind turbine. Wind turbines come in two general types, those whose main turning shaft is horizontal and points into the wind, and those with a vertical shaft that points up. The Savonius is an example of the vertical axis type. It consists of two simple scoops that catch the wind and cause the shaft to turn.
Difficulty: High school
The simplest wireless telegraph set consists of a means of generating and controlling a spark which sends out radio waves into the air, and a receiver or detector to detect the radio waves. Probably the simplest way to generate and control a spark is to use a switch (called a telegraph key) to turn on and off a buzzer which generates sparks. The simplest way to receive or detect the radio waves
Difficulty: High school
This page presents a "basement science" experiment which reveals the universality of gravitation by demonstrating the gravitational attraction between palpable objects on the human scale. The experiment deliberately uses only the crudest and most commonplace materials, permitting anybody who's so inclined to perform it. Einstein's 1915 theory of General Relativity explains gravitation
Difficulty: High school
For those who dream of giant solar collectors which can generate temperatures high enough to melt steel, below is a method for building your own Solar Furnace of any size you desire.
Difficulty: High school
This is an AC electric generator which is capable of lighting up a tiny incandescent light bulb. The generator is made up of a hollow-ended cardboard box with a nail through the center, many turns of copper wire wound around the box, and four larger magnets clamped around the nail. When the nail and magnets are spun fast by hand, the little light bulb lights up dimly.
Difficulty: High school
There are a number of science museum exhibits which require many tens of amperes of electric current in a thick cable to generate strong magnetism. One example is a raft of compasses with a 200-amp cable running through the center of the raft. Or, three 100-amp cables with three-phase AC powering them, where the resulting field rotates and can spin a conductive object by induction
Difficulty: High school
1. observe that soil erosion occurs when the water washes the soil away from the trays. 2. record their data. 3. construct a general scientific understanding that plants hold soil in place via roots and help prevent soil erosion by water. 4. conclude that soil erosion by water increases with the destruction of the rain forests.
Difficulty: High school
Sucrose, commonly known as table sugar, is a disaccharide composed of an alpha-D-glucose molecule and a beta-D-fructose molecule linked by an alpha-1,4-glycosidic bond. When this bond is cleaved in a hydrolysis reaction, an equimolar mixture of glucose and fructose is generated. This mixture of monosaccharides is called invert sugar, which is derived from the fact that sucrose rotates plane
Difficulty: High school
The purpose of this experiment was to test the effects of acid rain on several generations of living organisms. This researcher was interested in exploring whether mutations, found in an acid environment would also be observed if the offspring were removed from the acid environment into a neutral environment. Drosophila melanogaster were selected as subjects, due to their short life span, ease
Difficulty: High school
This research project aims to investigate a possible link between the biological basis for allergy to cows' milk and the general rise in allergies among children. The aim of this project is to see if there is an association between the behaviour of certain immune cells in children who are allergic to cowsÂ’ milk and the general increase in development of allergies of all kinds among children.
Difficulty: High school
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