Journal Dec 2020
Investigation of Parameters in …
Amirmehdi Jafari Fesharaki, Sharif University of Technology, [email protected]
Journal Vol 4, No 1, 2020, (P 3)
This is a problem related to oscillations of a Newton’s cradle which will gradually decay until the spheres come to the rest. The effect of several parameters such as number, material and alignment of the spheres on the rate of decay in this research have been investigated. The collision between two balls was our initial observation and then it was extended to a higher number of balls. A comparison between middle and side ball and the effect of number of the releasing balls and alignment are investigated theoretically which shows the decay in collisions and also increasing the number of the balls will cause increasing the rate of decay too. It also shows that as we use more elastic materials, the rate of decay decreases in our experiment.
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SAXON BOWL
Daniel Norouzi, [email protected]
Journal Vol 4, No 1, 2020, (P 4-7)
Saxon bowl is a bowl with a hole in its base that will sink when placed in water. In this paper, this phenomenon and the parameters that determine the time of submersion were investigated. Two differential equations were evaluated by neglecting some effects and parameters such as viscosity, water turbulence, etc. Then they were solved either by approximation and coding in Python programming language. While adjusting the vessel mass and hole area, total 54 experiments were conducted by adjusting one variable and keeping the other constant. It was observed that the experiment and modeling results differ but have a close trend because of the neglected parameters and effects.
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Determination of the Safe Dose of …
METIN MERT a* CENGİZ BEYZAb ONARAN MEHMET ALIc
a) Mugla Sıtkı Koçman University, Faculty of Milas Veterinary, Department of Biochemistry, 48200 Muğla, Turkey, [email protected]
b) Muğla Private Yönelt Anatolian High School 12th Grade Science Student, 48100 Muğla, Turkey
c) Muğla Private Yönelt Anatolian High School Project Coordinator, 48100 Muğla, Turkey
Journal Vol 4, No 1, 2020, (P 8-12)
Euphorbia rigida Bieb. is a poisonous milk-bearing plant, which is in the form of shrubs or trees growing in tropical and temperate regions and belonging to the Euphorbiaceae family, which has nearly 100 species in our country. The Euphorbiaceae family, known for its capacity of being used as antioxidant, antimicrobial and biopecticides, has attracted great attention in recent years. In this study, the safe dose of the extracts of E. rigida Bieb. believed to have the capacity of being used in both medicinal and agricultural applications, and very common in Muğla, will be determined by using Brine shrimp lethality assay.
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Keratin Protein Based Bioplastic …
Rabia YİGEN, Ayşe ONGUN YÜCE , Adana Bahtiyar Vahabzade Social Sciences High School, Adana, Turkey
[email protected] , [email protected]
Journal Vol 4, No 1, 2020, (P 13-15)
In this study , keratin protein (KP) consisting of cystine amino acids was obtained by precipitation of human hair in an alkaline environment. The obtained protein was mixed with microcrystalline cellulose (filler) (MS), plasticizer at appropriate proportions and temperature until it reached gel consistency. According to the results obtained, it is seen that the highest degradation is achieved in sea water, whereas KP-based bioplastics do not have a very long-term resistance to dissolution in soil and sea water under normal conditions, dissolve in a short time and do not cause pollution in the environment. Therefore, KP bioplastics can be used in industrial applications such as the food, packaging, and agriculture industry.
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Friction Oscillator
Sahar Semsarha ,Farzanegan2 high school, Tehran/ Iran, [email protected]
Journal Vol 4, No 1, 2020, (P 16-18)
This essay is about oscillation of a massive object place on the rotating cylinders’ Twitch rotate in opposite directions. The place and frequency of the massive object have been investigated. Although a simulation has been presented and affective parameters like friction coefficient, distance between cylinders have been investigated.
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Investigating a Falling tower …
Arsalan Firoozkoohi *, Mahan Fallahpour, Alghadir high school, Kish Island/ Iran
Journal Vol 4, No 1, 2020, (P 19-21)
Identical discs are stacked one on top of another to form a freestanding tower. The bottom disc can be removed by applying a sudden horizontal force such that the rest of the tower will drop down onto the surface and the tower remains standing. This phenomenon has been investigated and the conditions and the most important parameters which allow the tower to remain standing are found. By using free body diagram the identical forces are explained and in MATLAB more comparative and accurate measurements related to various angular accelerations are measured.
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Building and Studying an Electrostatic Motor
Mahsa Geramimanesh, Farzanegan 2 High School, Tehran/Iran, [email protected]
Journal Vol 4, No 1, 2020, (P 22)
For building a simple electrostatic motor which its propulsion is based on corona discharge, we used a rotor with 4 electrodes with sharp blades on them. By attaching them to the Van de Graaff and a power supply, the rotor could rotate in its place. To optimize the setup, the effect of different parameters such as the angle of the electrodes, diameter of the rotor, number of the electrodes or the distance between the electrodes have been investigated and the rotor reaches the maximum speed at a fixed input voltage.
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Analysis of Factors Affecting the Taste of a Food
Artin Radmatin , Vale School, Tehran/Iran
Journal Vol 4, No 1, 2020, (P 23-24)
Saliva in our mouth helps to identify different tastes. It is very important to separate the nature of the sense and perception of the taste. Sense is the act of receiving stimuli by organs. In this research, we first examined the structure of the sense of the taste and its perception mechanism in humans. Then, two quantitative parameters were selected: Food Temperature and the number of the chewing of the food in our mouth.The test was done with the statistical community based on the determined parameters. The statistical community were selected from 1 to 14 years, 15 to 24 years, 25 to 44 years, 45 to 64 years and 65 years and over.
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Bubbles’ Oscillations in Liquids
Bahar Aghazadeh , Farzanegan 5 high school, Tehran/ Iran, [email protected]
Journal Vol 4, No 1, 2020, (P 25)
When a container of liquid (e.g. water) oscillates vertically, it is possible that bubbles in the liquid move downwards instead of rising. As the bubble moves downward, the pressure of the water increases and the volume of the bubble will decrease. Then the added mass decreases and the bubble accelerate downward. But when the bubble moves upward, the volume and the added mass will increase, and pressure decreases so the acceleration will decrease. The point is that every time when the bubble moves up; because of low acceleration, it will not go to its initial place. It means in each oscillation the bubble effectively goes down.
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Sahar semsarha , Farzanegan 2 high school, Tehran/ Iran, [email protected]
Journal Vol 4, No 1, 2020, (26-28)
In this essay, the motion of the particles inside a container have been investigated. When something is rubbed along the bottom of the container, the amount of the particles pouring out will increase. In this paper the main reason of the phenomenon has been explained and also some affective parameters such as the particle poured inside the contain, the area of the holes of the container have been investigated.
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A Dual Efficiency Optical Instrument
Shiva Mahdavisereshtl, Tehran/ Iran
Journal Vol 4, No 1, 2020, (29-31)
Both telescope and microscope are basically constructed using 2 planoconvex lenses. However, it is considerable that in telescopes the eye piece lens focal distance is shorter than the objective one while on contrary in microscopes the focal distance in eye piece lens is longer than the other. According to this fact, it seems that these 2 devices, telescope and microscope, are operating inversely.
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Combination of Air and Water Pressure…
Mahsa Tajdari, Tehran/ Iran
Journal Vol 4, No 1, 2020, (32-33)
Our discussion of fluids has two parts, statics and dynamics. Fluid statics concentrates on the properties of fluids at rest, while fluid dynamics focuses on fluids in motion. There are static fluids in the hydraulic systems that transmit the large pressures. In this paper a hydrostatic system is recommended. This system is able to save the potential energy of water in a new procedure by using the combination of air pressure and pressure of the fluids. The potential energy of water in the back of the dams is utilized to produce electricity. So, using this recommended hydrostatic system, we can reuse the water exiting out of turbines in power plants.
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El Niño and La Niña, Children of the …
Maryam Sadat Masoudian, Tehran/ Iran
Journal Vol 4, No 1, 2020, (34-37)
As we know the weather is going to be hot so the worst hurricanes, floods and other bad and new events will happen. In this work, attempt was made to study El Nino and La Nina in Persian Gulf. Iran is a country with normal weather and El Nino and La Nina will happen in areas that have abnormal changeable weather.
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