Ram Pressure

Ram pressure is a pressure exerted on a body which is moving through a fluid medium. It can be said that the molecules in the fluid(only two known fluids i.e, liquids and gases) 'ram' onto the moving particles creating pressure. It causes a strong drag force to be exerted on the body. It is given by: P = ρv2  where P is the pressure, ρ(rho) is the density of the fluid and v the velocity of the body. Alternatively the body can be stationary and v describe the velocity of the fluid, e.g. the solar...

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Meteors, Meteoroid and Meteorites.

Meteoroid is a particle of debris in the Solar System. The meteoroid can be of the size of a speck of sand or even a boulder. The visible path of a meteoroid that enters Earth's (or another body's) atmosphere is called a meteor, or colloquially a shooting star or falling star. If a meteoroid reaches the ground and survives impact, then it is called a meteorite. A meteorite is supposed to...

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Science behind optical illusion

1) Found anything amazing? I’ll tell you what is amazing in this. Observe the center of the square as the big circles move in. The square seems full right? Now observe any one big circle as it moves on a side of the square. Its incomplete right? Know why this happens? Ans: When you look at the center of the square, the brain tries to fill the square and tries to make it look complete though its incomplete without ‘you’ realizing it. 2) These...

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The Asteroid Belt

The Asteroid belt is the region of the Solar System located roughly between the orbits of the planets Mars and Jupiter where a huge number of asteroids revolve around the Sun. These asteroids are also called minor planets. The asteroid belt region is also termed the main asteroid belt or main belt because there are other asteroids in the solar system such as near-Earth asteroids and trojan...

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Special article: Android OS

Android  Android is a software stack for mobile devices. Android includes an operating system,middle ware and key applications. Android OS smartphones are one of the best and most selling phones in the world. It's the best-selling Smartphone platform. All prefer smartphones with Android OS because of the large extent of apps or applications. Google Inc. purchased the...

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Capacitive sensing

You have now understood how capacitive touch screens work. Now let me help you in understanding how the designs are mad and how multi-tasking is performed. Design: Capacitive sensors can be constructed from many different media, such as copper, Indium tin oxide (ITO) and printed ink. Copper capacitive sensors can be implemented on standard FR4 PCBs as well as on flexible material. ITO allows the capacitive sensor to...

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Why do we expect life mostly on Mars?

There had been strange beliefs that life existed on Mars and Moon. But the concept of life on Moon was discarded when the face on the moon(many craters on its surface looked like a face) was proved to be only the craters. But the search for Extra Terrestrial Life continued, and people thought that there was life form on Mars.  And the main reasons for that are: Photo of microscopic rock formations indicating past signs of...

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Mars

Mars (Greek: Ares) is the god of War. The planet probably got this name due to its red color; Mars is sometimes referred to as the Red Planet. (An interesting side note: the Roman god Mars was a god of agriculture before becoming associated with the Greek Ares; those in favor of colonizing and terraforming Mars may prefer this symbolism.) The name of the month March derives from Mars. ARE THERE REALLY CANALS ON MARS? Mars...

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Consequences of rotation of the Earth

The Earth has always been in constant rotation since its formation. Like other planets in the Solar System, Earth was formed by the Molecular Cloud. But the speed of rotation has been decreasing since its formation. Lets see the results of its rotation.  Day-Night phenomenon: The primary effect is the phenomenon of day-night. As Earth rotates on its axis, the day and nights are caused. The part of the Earth that receives sunlight...

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