Science Fair Entries Personal Evaluation
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Solibaga, Nathaniel Joseph R. Dr. Ma. Josephine De Luna 2013-12011 Physics 72 Science Fair Entries Personal Evaluation CHEMISTRY ENTRY . SEEING SOUNDS THROUGH CYMATICS Even though they deserve to be in the Physics category, I view them as the most interesting and newest heard experiment. According to the posted literature beside the exhibit, cymatics is the study of visible sound. Cymatics is pioneered by the Swiss Medical Doctor, Hans Jenny. Cymatics come from the Greek word “kyma” meaning “billow” or “wave”. Typically, the surface of a plate, diaphragm or membrane is vibrated and regions of maximum and minimum displacement are made visible in a thin coating of particles, paste or liquid. Non-Newtonian fluids are fluids that do not obey Newton’s models for fluids. Its viscosity changes depending on the stress applied to it. In the exhibit it is made of cornstarch dissolved in water. Since the non-Newtonian fluid experiences stress through the sound waves produced by the speaker, it changes its properties accordingly with music, becoming solid or liquid and forming shapes depending on the tune. Why did I choose this exhibit? Lava lamps are simple application of high school chemistry-colloids. Human battery is just a demonstration of the conductivity of human body. It is thus not a human battery but only a human conductor as electrons flow from one plate to another. Bleeding iron heart is quite interesting and it’s the second best for me. It showcases the color change in a reaction of iron producing bloody red thiocyanate. We also found out that fractals can be produced by sound similar to fractals in nature. PHYSICS ENTRY Evidently, most of the entries are Physics entries and thus a good competition resulted. . AMAZING PENDULUMS specifically HARMONOGRAPH Shallow to judge but cool design are created by this mechanical drawing machine. Harmonographs are mechanical devices that trace out the resultant of two or more simple harmonic motions, typically along mutually-perpendicular axes. The key to successful operation of any harmonograph which relies on stored mechanical energy is low friction. Superimposed on all of the motions is an overall damping factor which eventually brings the pendulum to a halt. If this damping is too large, the lines drawn by the pen are too far apart, and the figure is uninteresting.
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Science Fair Entries Personal Evaluation
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Solibaga, Nathaniel Joseph R.Dr. Ma. Josephine De Luna2013-12011Physics 72Science Fair Entries Personal EvaluationCHEMISTRY ENTRY. SEEING SOUNDS THROUGH CYMATICSEven though they deserve to be in the Physics category, I view them as the most interesting and newest heard experiment. According to the posted literature beside the exhibit, cymatics is the study of visible sound. Cymatics is pioneered by the Swiss Medical Doctor, Hans Jenny. Cymatics come from the Greek word kyma meaning billow or wave. Typically, the surface of a plate, diaphragm or membrane is vibrated and regions of maximum and minimum displacement are made visible in a thin coating of particles, paste or liquid. Non-Newtonian fluids are fluids that do not obey Newtons models for fluids. Its viscosity changes depending on the stress applied to it. In the exhibit it is made of cornstarch dissolved in water. Since the non-Newtonian fluid experiences stress through the sound waves produced by the speaker, it changes its properties accordingly with music, becoming solid or liquid and forming shapes depending on the tune.Why did I choose this exhibit? Lava lamps are simple application of high school chemistry-colloids. Human battery is just a demonstration of the conductivity of human body. It is thus not a human battery but only a human conductor as electrons flow from one plate to another. Bleeding iron heart is quite interesting and its the second best for me. It showcases the color change in a reaction of iron producing bloody red thiocyanate.We also found out that fractals can be produced by sound similar to fractals in nature.
PHYSICS ENTRYEvidently, most of the entries are Physics entries and thus a good competition resulted.. AMAZING PENDULUMS specifically HARMONOGRAPHShallow to judge but cool design are created by this mechanical drawing machine.Harmonographs are mechanical devices that trace out the resultant of two or more simple harmonic motions, typically along mutually-perpendicular axes. The key to successful operation of any harmonograph which relies on stored mechanical energy is low friction. Superimposed on all of the motions is an overall damping factor which eventually brings the pendulum to a halt. If this damping is too large, the lines drawn by the pen are too far apart, and the figure is uninteresting.
MATH ENTRYI have not inspected all of the Math exhibits so I chose the one where I won the game with a gift certificate and the other one as aesthetic Mathematics.. PROJECT ALMANAC I won the game here.. BEAUTY SYMMETRYWe can relate physical beauty to science and the subjectivity of beauty now becomes objective. Physical attraction depends on ratio.Our attraction to another person's body increases if that body is symmetrical and in proportion. Likewise, if a face is in proportion, we are more likely to notice it and find it beautiful.Scientists believe that we perceive proportional bodies to be healthierLeonardo da Vinci's drawings of the human body emphasized its proportion. The ratio of the following distances is the Golden Ratio:(foot to navel): (navel to head)Similarly, buildings are more attractive if the proportions used follow the Golden Ratio.This mask of the human face is based on the Golden Ratio. The proportions of the length of the nose, the position of the eyes and the length of the chin, all conform to some aspect of the Golden Ratio.
