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812 projects · showing 751–780 Physics and Astronomy — clear category filter Clear all

ISEF · 2014

Healthy Grapevines without Heavy Metals

Physics and Astronomy

In this project we come with an inovative method of combating fungal diseases of grapevines, which nowadays are treated with chemicals based on copper that is a heavy metal and can cause ser…

ISEF · 2014

How CAM Plants Open and Close Stomata

Physics and Astronomy

C3 plants open their stomata depending on blue light absorbed by phototropins during the daytime to get CO2 for photosynthesis and close stomata at night. By contrast, CAM plants like cacti…

ISEF · 2014

IR against Piracy

Physics and Astronomy

Thousands of people work in movie industry. They do earn money by proper selling of their products. But there are some groups of people just simply capture the movie at the cinema. When thes…

ISEF · 2014

Measuring Water Waves

Physics and Astronomy Fourth Award

When a water droplet impacts a surface of water, part of the drop disappears into the water, while the rest bounces out again. This fascinating process repeats itself several times in a frac…

ISEF · 2014

Model of Soliton Waves

Physics and Astronomy

Soliton waves are self-reinforcing waves that maintains their shapes while they move at constant speed. They are caused by cancellation of dispersion effect and distortion effect during the…

ISEF · 2014

Negative Radio Components

Physics and Astronomy

In the main, basic characteristics of radio components such as resistance R, capacitance C and inductance L are positive. Consequently, the combinations of these components that have time va…

ISEF · 2014

PT-Symmetry Breaking in Periodic Potentials

Physics and Astronomy Third Award

Over the past decade, there has been an explosion of interest in PT-symmetric structures in quantum systems, when reversed in parity (P) and time (T), remain invariant. The purpose of this w…

ISEF · 2014

Red Raspberries vs. Gold Raspberries

Physics and Astronomy

Raspberries are a composite fruit that are red and gold in color and boast a distinctive sweet and tart flavor and contain phenols and anthocyanins. This project was conducted to determine i…

ISEF · 2014

Skim Milk vs. Tobacco Mosaic Virus

Physics and Astronomy

The purpose of this project observes the effects of the application of skim milk on the affects of Tobacco Mosaic Virus, the most common virus in the world, and its affects on the growth rat…

ISEF · 2014

Solar Sailing with Modulated Radial Thrust

Physics and Astronomy

A study was carried out of the trajectories of space probes powered only by solar sails using modulated radial thrust (MRT). The flux of photons hitting a solar sail exerts a thrust that pus…

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