Javalab Free interactive science simulation website for school. Simulates various natural phenomena Includes Physics, Chemistry, Earth, Astronomy, Biology, Measurment, Mathmatics… Based on HTML5 Available on mobile devices and tablets also No more…
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Focusing To see things detaily, the light from one point of the object must be gathered exactly at one point on the retina. On the other hand, if the light from one…
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Parallax When an object is close to me, you can use a ruler to measure the distance. But, it is difficult to measure when the object is away from me. In this…
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Celestial coordinate system A celestial sphere is an abstract sphere centered on an observer. All objects in the sky can be conceived as being projected upon the inner surface of the celestial…
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Celestial coordinate system A celestial sphere is an abstract sphere centered on an observer. All objects in the sky can be conceived as being projected upon the inner surface of the celestial…
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Constellations If you look at the sky where there is no light on a clear night, there are so many stars can not count. Thousands of years ago, the ancients linked stars…
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Conservation of Mechanical Energy If you look at the roller coasters, you can find something very interesting. That’s right, there is no engine on the roller coaster. When we lift the roller…
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Paraffin, the main ingredient of candles Paraffin, the main ingredient of candles, is alkane hydrocarbons in which 20 to 40 carbon atoms are linked in a chain. It does not dissolve in…
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The tilt relationship of the celestial sphere and ecliptic The celestial equator is the enlargement of the earth’s equator to the celestial sphere. Therefore, the celestial equator can be represented by a…
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Theo Jansen He is the leading artist of kinetic art with the nickname of Da Vinci in the 21st century.He is famous for making wind-driven structures using simple materials such as PET…
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Charle’s Law Assuming constant pressure, increasing the temperature of the gas will speed up the molecular motion. As the gas often collides with the vessel wall, the volume increases. Conversely, if you…
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Boyle’s Law If you press the piston of a syringe containing a certain number of gas molecules, the space of the gas molecules is reduced. Therefore, the gas molecules collide with the…
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Apparent Motion of Mars If you observe the motion of Mars, you can see that you go forward and go backward. This procession of Mars has been regarded as mysterious since ancient…
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