Research Project: Potato The potato originated in the South American Andes‚ but its heartland of wild genetic diversity reaches from Venezuela‚ Colombia‚ Ecuador‚ Peru‚ Bolivia‚ Argentina‚ Chile‚ Uruguay‚ Paraguay‚ southern Brazil‚ northward into Central America‚ Mexico‚ and the southwestern United States. Potato was first cultivated between 3 and 7 thousand years ago‚ some scientists believe they may have grown wild in the region as long as 13‚000 years ago. Potato is the third most important
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each. Along this line‚ the midpoint of the base of one triangle is the vertex of the next‚ as shown in the diagram below. What is the area of the region that is covered by the union of the five equilateral triangular regions? Answer: Question Attempt 1 Attempt 2 Attempt 3 1 Triangles The area is: The area is: The area is: Time Score: Question First Attempt Second Attempt Third Attempt Correct (100) Time/Pts Correct (75) Time Correct
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I recently wrote an essay about the development of the star persona of Ice Cube‚ the rapper/actor who has made the unusual transition from hardcore gangsta rapper to leading man in such “family-friendly” films as Are We There Yet? The essay‚ entitled “With an Attitude: The Development of Ice Cube’s Star Persona‚” will soon be published in the online film journal 16:9; I’ll link to it as soon as it’s up. The thesis of the essay is that‚ for all the apparent and unexpected alterations to his “street”
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between the rate of reaction and the surface area. The larger the surface are‚ the faster the rate of reaction seems to be. However‚ although the grain with the largest surface area (the smallest grain) reached the highest point within the shortest amount of time‚ its end result was still lower then the medium sized grain. The explanation for this result is relatively easy. The rate of a chemical reaction can be increased by increasing the size of the surface area to volume ratio of the solid reactant
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growth‚ more chemical activity will have to happen and the rate of metabolism will also increase‚ which means that more substances have to be taken in and to also be removed. This is where the surface area to volume ratio comes into place; the reason why this ratio is so important is because the surface area of a cell essentially affects the rate of the transferring of useful substances (through diffusion and osmosis etc.) in and out of the organism. On the other hand‚ the total volume of the organism
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Synopsis This project report explains about the surface tension and capillarity of liquid through a simple experiment of finding the capillarity of various detergents. Oil stains and grease on dirty clothes cannot be removed‚ using water alone‚ because water does not wet them. If detergents added ‚ surface tension is decreased‚ the area of contact is increased. Detergent molecules have the shape of a hairpin‚ one of which is attracted to water
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Pg1Pg1 SCIENCE EXPERIMENTS ON FILE ™? Revised Edition 5.40-1 Potato Battery Lois Fruen and Chelen Johnson Topic Construction of a battery Time 45 minutes to 1 hour Safety ! Please click on the safety icon to view the safety precautions. Adult supervision is necessary for the soldering of the alligator
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Best Rubik’s Cube I know what you’re thinking… “Are there different kinds of Rubik’s Cube?” The answer to that question is a resounding YES! There is a variety of Rubik’s Cube of different sizes. Apart from the usual 3 x 3 x 3 Rubik’s Cube‚ there’s a 2 x 2 x 2‚ 4 x 4 x 4‚ 5x 5 x 5‚ 6 x 6 x 6‚ 7 x 7 x 7 Rubik’s Cube as well. Heck‚ there’s even a pyramid and dodecahedron shaped Rubik’s Cube. However‚ if you can’t solve the regular Rubik’s cube‚ you might have a headache trying to solve the other Rubik’s
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agar cubes Introduction: All cells are dependent on a processes called diffusion‚ which is the movement of a substance from an area of higher concentration to an area of lower concentration. Cells need to obtain certain essential substances‚ like oxygen‚ for their survival. The rate of diffusion is said to be dependent upon the various factors: Size of molecules that have to diffuse‚ concentration gradient‚ the distance across which diffusion occurs‚ number of pores/openings‚ surface area and
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then determined that there were four ways to increase the reaction rate: increase temperature‚ add a catalyst‚ increase surface area‚ and increase the concentration of reactants. The objective of this lab was to experimentally show how temperature and surface area impact the rate of reaction‚ so only two of these methods were tested. The evidence indicates that increasing surface area increases the reaction rate‚ and increasing temperature also increases the reaction rate. Temperature is the measure
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