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The great pyramids of Giza are among the most famous landmarks in the world, but they are still shrouded in mystery. There are three pyramids at Giza, and these are known as Khufu, Khafre and Menkaure. One of the most…
Salmon and other fish swim upstream because it is part of their reproductive life cycle. Salmon are born in freshwater rivers, spend most of their lives in the ocean and then return to the place they were born to lay…
In a solution, the solute is the minor component that is dissolved in the solvent. For example, salt is the solute in a salt water solution, and isopropanol or ethanol is the solute in a rubbing alcohol solution. Before working…
Usually, percentages are used to compare the size or proportion of a part to a whole. For example, you might say that 4 percent of students in your class have red hair, or 10 percent of them are left-handed. But…
A quadratic equation is one that can be written out in the form (ax^2 + bx + c = 0) where a, b and c are numbers (usually, but not necessarily, whole numbers). Learning to solve quadratics is a mainstay…
The tundra biome that stretches from Alaska to Siberia may seem like a barren landscape, but many different types of insects live in the tundra. According to scientific studies of insects in the arctic tundra, there are over 2,000 species…
The pipe’s cross-sectional area has a number of applications in fluid dynamics, letting you calculate a pipe’s flow rate or pressure drop. The measurement relates directly to the pipe’s internal diameter. The factor relating the pipe’s diameter and its area…
Vertical climate is characterized by a terrestrial landscape that changes dramatically with an increase in altitude. As mountains rise, the climate surrounding them changes based on elevation. Vertical climates can exist in all parts of the world, but are most…
You hear the term hertz in electricity as well as when discussing the transmission of electromagnetic waves – of which light and radio waves are examples – and the speed of computer processors. The common factor in all these phenomena…
Hot and cold water are both liquid forms of H2O, but they have different densities due to the effect of heat on water molecules. Although the density difference is slight, it has a significant impact on natural phenomena such as…
