Earth

Earth is the third planet on or after the Sun and the fifth largest of the planet. Earth is the only planet whose English forename does not originate from Greek/Roman mythology. The name derives from Old English and Germanic.

Earth, for sure, can be studied exclusive of the aid of spacecraft. However it was not until the twentieth century that we had maps of the complete planet. Pictures of the planet taken from space are of significant importance; for example, they are a huge help in weather prediction and especially in tracking and predicting hurricanes, they are amazingly beautiful. The Earth's magnetic field and its relationships with the solar wind also generate the Van Allen emission belts, a pair of doughnut shaped rings of ionized gas (or plasma) trapped in orbit just about the Earth. The on the outside belt stretches from 19,000 km in altitude to 41,000 km; the inner belt lies involving 13,000 km and 7,600 km in altitude.

Venus and Earth

Venus is by the side of times regarded as Earth's sister planet. In some ways they are particularly similar:

* Venus is only a bit of smaller than Earth (95% of Earth's diameter, 80% of Earth's mass).

* Both have a small number of craters representing relatively young surfaces.

* Their densities and chemical compositions are in a similar way.

Because of these similarities, it was measured that below its dense clouds Venus might be very earthlike and power even have life. However, unfortunately, more detailed study of Venus reveals that in plenty of important ways it is radically different from Earth. It may be the smallest amount hospitable place for life in the solar system.

The strength of Venus' atmosphere at the surface is 90 atmospheres (about the same as the pressure at a deepness of 1 km in Earth's oceans). It is collected generally of carbon dioxide. There are numerous layers of clouds many kilometers bulky composed of sulfuric acid. These clouds entirely incomprehensible our view of the surface. This thick atmosphere creates a run-away greenhouse effect that raises Venus' face temperature by about 400 degrees to over 740 K (hot enough to melt lead). Venus' surface is truly hotter than Mercury's in spite of creature nearly twice as far from the Sun. The oldest terrains on Venus appear to be regarding 800 million years old. Extensive volcanism at that time wiped out the in move ahead surface counting any large craters from early in Venus' history.

The facts about Venus

Venus (Greek: Aphrodite; Babylonian: Ishtar) is the goddess of feel affection and beauty. The planet is so named the majority likely because it is the brightest of the planets recognized to the ancients. Venus has been identified since prehistoric times. It is the brightest thing in the sky not including for the Sun and the Moon. Like Mercury, it was generally thought to be two part bodies: Eosphorus as the morning star and Hesperus as the sunset star, but the Greek astronomers knew better.

Venus' rotary motion is rather unusual in that it is both very slow (243 Earth days per Venus day, somewhat longer than Venus' year) and retrograde. Moreover, the periods of Venus' rotary movement and of its orbit are synchronized such that it for all time presents the same face in the direction of Earth when the two planets are at their neighboring approach.

Eastern philosophy

Eastern philosophy includes the various philosophies of Asia, including Indian philosophy, Chinese philosophy, Iranian philosophy, Japanese philosophy, and Korean philosophy. The term can also sometimes include Babylonian philosophy and Islamic philosophy, though these may also be considered Western philosophies.

Eastern thought, at least since the rise of European influence in Asia, is often associated with philosophy in the Western sense, especially in certain Asian academic circles. However, before the global influence of European and American technological and scientific education, the idea of philosophy as rigorous science is not found in traditional Eastern writings, which are for the most part religious and mythical.[dubious – discuss] In our own time some Western trained linguists have sought to use novel translation methods to make Eastern thought resemble Western philosophy, especially the influential Marxist-Leninist tradition.

Mercury's dense iron core

Mercury is to a great extent denser than the Moon (5.43 gm/cm3 vs. 3.34). Mercury is the second densest mainly important body in the solar system, after Earth. Actually Earth's density is outstanding in part to gravitational density; if not for this, Mercury would be denser than Earth. This signifies that Mercury's dense iron core is reasonably larger than Earth, probably comprises the greater part of the planet. Mercury therefore has only a comparatively thin silicate mantle and crust.

Mercury's inner is under enemy control by a big iron core whose radius is 1800 to 1900 km. The silicate on the outside shell (analogous to Earth's mantle and crust) is just 500 to 600 km thick. At least several of the core is perhaps molten. Mercury truly has an enormously thin atmosphere consisting of atoms blasted off its surface by the solar wind. Because Mercury is so hot, these atoms speedily flee into space.

The facts about Mercury

Mercury is the in close proximity planet to the Sun and the eighth biggest. Mercury is somewhat slighter in diameter than the moons Ganymede and Titan but more than twice as enormous.

Mercury's orbit is exceptionally eccentric; at perihelion it is just 46 million km from the Sun but at aphelion it is 70 million. The position of the perihelion processes regarding the Sun at a very slow rate. 19th century astronomers made extremely careful explanation of Mercury's orbital parameters but could not sufficiently explain those using Newtonian mechanics. The tiny differences between the experimental and predicted values were a slight but nagging problem for many decades. It was thought that one more planet (sometimes called Vulcan) slightly nearer to the Sun than Mercury power account for the discrepancy. But in spite of much effort, no such planet was found. The real reply turned out to be much more dramatic: Einstein's General Theory of Relativity! Its right forecast of the motions of Mercury was a main factor in the early acceptance of the theory.

Vehicle

The Trikke is a Human mechanical Vehicle (HPV) This article is about the means of transport. For additional uses see Vehicle (disambiguation).

Vehicles are lifeless means of transportation. They are nearly everyone often man-made (e.g. bicycles, cars, motorcycles, trains, ships, and aircraft), although some other means of transportation which are not made by man can also be called vehicles; examples include icebergs and floating tree trunks.

Vehicles possibly will be propelled by animals, e.g. a chariot or an ox-cart. However, animals on their own, although used as a means of transportation, are not called vehicles. This includes humans carrying another human, for example a child or a disabled person.

Vehicles that do not voyage on land are often called crafts, such as watercraft, sailcraft, aircraft, hovercraft and spacecraft.

Most land vehicles contain wheels. Please observe the wheel article for examples of vehicles with and without wheels.

Movement without the rally round of a vehicle or an animal is called locomotion. The word vehicle itself comes starting the Latin vehiculum

Abstract art

Abstract art is now typically understood to mean art that does not depict objects in the natural world, but instead uses color and form in a non-representational way. In the very near the beginning 20th century, the term was more often used to describe art, such as Cubist and Futurist art, that depicts real forms in a simplified or rather reduced way—keeping only an allusion of the original natural subject. Such paintings were often claimed to capture astonishing of the depicted objects' immutable intrinsic qualities rather than its external appearance. The additional precise terms, "non-figurative art," "non-objective art," and "non-representational art" keep away from any possible ambiguity.

Bay of Bengal

The Bay of Bengal is a cove that forms the northeastern ingredient of the Indian Ocean. It resembles a triangle in form, and is enclosed on the east by Malay Peninsula, and on the west by India. On the northern pour of the "bay" lies the Bengal region, comprising the Indian state of West Bengal and the country of Bangladesh, thus the name. The southern boundaries arrive at the island country of Sri Lanka, and the Indian Union Territory of Andaman and Nicobar Islands.

The Bay of Bengal occupies a region of 2,172,000 km². It is bordered by India and Sri Lanka to the West, Bangladesh to the North, and Myanmar and the southern division of Thailand to the East. Its southern border extends as an imaginary line from Dondra Head at the southern end of Sri Lanka to the northern angle of Sumatra. A number of huge rivers – Ganges, Brahmaputra, Irrawaddy, Godavari, Mahanadi, Krishna and Cauvery – run into the Bay of Bengal. Among the vital ports are Yangon, Kolkata/Calcutta, Chittagong, Cuddalore, Kakinada, Machlipatnam, Madras, Paradip and Vishakapatnam.

Fresh skin-care tips

Select fresh, in nature grown fruit and vegetables for the highest benefits. Avoid making more than you have need for a single application. Clean and sanitize all countertops and combination utensils ahead of making any of the recipes. First clean all fruit and vegetables before using as ingredients. Take all ingredients out of the fridge for up to an hour before integration. Don't let fruit acquire any space heater than room temperature.

Fresh fruit and vegetables are particularly high in acids. If you apply anything to your skin and come across a burning sensation, take out immediately and apply cool water. If you are in the care of a dermatologist and on acne medications, please consult with your physician first.

Butter chicken

Butter chicken or murgh makhani is an Indian dish accepted in countries all over the world that have a tradition of Indian restaurants. While the dish's general recipe is well known, the actual flavour can differ from restaurant to restaurant even within Delhi. Butter chicken is usually served with naan, roti, parathas or steamed rice.

It is a dish prepared by marinating a chicken overnight in a yoghurt and spice mixture usually together with garam masala, ginger, lemon or lime, pepper, coriander, cumin, turmeric, chilli, methi and garlic. It is in various ways like to chicken tikka masala. The chicken is then roasted or dry as a bone.

Sound measurement

The decibel (dB) is a logarithmic part of measurement that expresses the magnitude of a physical quantity (usually power) qualified to a specified or implied reference level. Its logarithmic natural history allows very large or very small ratios to be represented by a convenient number, in a related manner to scientific notation. Since it expresses a ratio of two quantities, it is a dimensionless unit. The decibel is useful for a extensive variety of measurements in acoustics, physics, electronics and other disciplines because it linearizes a physical value -- e.g. light intensity or level of noise -- in which exponential changes of magnitude are perceived by humans as being more or less linearly related.

The decibel is not a SI unit. In April 2003, the International Committee for Weights and Measures (CIPM) measured a recommendation for its inclusion in the SI system and decided not to adopt that recommendation. Subsequent the SI convention, the d is lowercase, as it represents the SI prefix deci-, and the B is capitalized, as it is an abbreviation of a name-derived unit, the bel.

SOFAR channel in sound

When sound spreads out evenly in each and every one directions, the intensity drops in proportion to the inverse square of the distance. However, in the ocean there is a layer also called the 'deep sound channel' or SOFAR channel which can imprison sound waves at a particular depth, allowing them to travel much further. In the SOFAR channel, the speed of sound is lesser than that in the layers above and below. Just as light waves will refract towards a section of higher index, sound waves will refract towards a region where their speed is reduced. The result is that sound gets small in the layer, much the way light can be confined in a sheet of glass or optical fiber.

A similar consequence occurs in the atmosphere. Project Mogul successfully used this consequence to detect a nuclear explosion at a considerable distance.

Other methods of Sound

In these methods the time dimension has been replaced by a measurement of the inverse of time (frequency).

Kundt's tube is an example of an testing which can be used to measure the speed of sound in a small volume. It has the advantage of being able to assess the speed of sound in any gas. This method uses a powder to make the nodes and antinodes able to be seen to the human eye. This is an example of a compressed experimental setup.

A tuning fork can be held near the mouth of a long pipe which is plunging into a barrel of water. In this system it is the case that the tube can be brought to resonance if the length of the air column in the pipe is equal to ({1+2n}λ/4) where n is an integer. As the antinodal point for the tube at the open end is slightly outside the mouth of the pipe it is best to find two or more points of quality and then measure half a wavelength between these.

Here it is the case that v = fλ.

Experimental methods

A range of different methods are there for the measurement of sound in air.

Single-shot timing methods

The simplest concept is the dimension made using two microphones and a fast recording device such as a digital storage scope. This method uses the following idea.

If a sound foundation and two microphones are arranged in a straight line, with the sound source at one end, then the following can be measured:

1. The distance between the microphones (x), called as microphone basis. 2. The time of arrival between the signals (delay) reaching the dissimilar microphones (t)

Then v = x / t

An earliest method is to create a sound at one end of a field with an object that can be seen to move when it creates the sound. When the observer sees the sound-creating machine act they start a stopwatch and when the observer hears the sound they stop their stopwatch. Again using v = x / t user can calculate the speed of sound. A division of at least 200 m between the two experimental parties is required for good results with this method.

Basic concept of sound

The transmission of sound can be explain using a toy reproduction consisting of an array of balls organized by springs. For a real material the balls stand for molecules and the springs stand for the bonds between them. Sound passes through the representation by compressing and increasing the springs, transmitting energy to neighboring balls, which transmit energy to their springs, and so on. The speed of sound through the model depends on the inflexibility of the springs (stiffer springs transmit energy more quickly). Effects like spreading and reflection can also be understood using this model.

In a real material, the inflexibility of the springs is known as the elastic modulus, and the mass corresponds to the density. All extra things being equal, sound will travel more slowly in denser materials, and faster in stiffer ones.

Speed of sound
Sound is a trouble of mechanical energy that propagates through matter as a wave (through fluids as a density wave, and through solids as both density and shear waves). Sound is further characterized by the general properties of waves, which are frequency, wavelength, period, amplitude, speed, and direction (sometimes speed and path are combined as a velocity vector, or wavelength and direction are combined as a wave vector).

Humans make out sound by the sense of hearing. By sound, we usually mean the vibrations that travel through air and are audible to people. However, scientists and engineers use a wider meaning of sound that includes low and high frequency vibrations in the air that cannot be heard by humans, and sensations that travel through all forms of matter, gases, liquids, solids, and plasmas.

The substance that supports the sound is called the medium. Sound propagates as waves of alternating pressure, causing limited regions of compression and rarefaction. Particles in the average are displaced by the wave and oscillate. The scientific study of the combination and reflection of sound waves is called acoustics.

Pollutants in water

Pollutants in water consist of a large spectrum of chemicals, pathogens, and physical chemistry or sensory changes. A lot of the chemical substances are toxic. Pathogens can apparently produce waterborne diseases in either human or animal hosts. Alteration of water’s physical chemistry includes acidity, conductivity, temperature, and eutrophication. Eutrophication is the fertilization of surface water by nutrients that were previously scarce. Even many of the municipal water supplies in developed countries can present health risks.

The Vanilla orchid

The main type harvested for vanillin is Vanilla planifolia. Even though it is native to Mexico, it is now extensively grown throughout the tropics. Madagascar is the world's largest producer, Additional sources include Vanilla pompona and Vanilla tahitiensis (grown in Tahiti), though the vanillin satisfied of these species is much less than Vanilla planifolia.

Vanilla grows as a vine, mountaineering up an existing tree, pole, or other support. It can be full-fledged in a wood (on trees), in a plantation (on trees or poles), or in a "shader", in increasing orders of productivity. Left alone, it will produce as high as possible on the support, with few flowers. Every year, growers fold the senior parts of the plant downwards so that the plant stays at heights accessible by a standing human. This also very much stimulate flowering.

Earth's atmosphere

Earth's atmosphere is a layer of gases surrounding the planet Earth and retain by the Earth's gravity. It contains roughly (by molar content/volume) 78% nitrogen, 20.95% oxygen, 0.93% argon, 0.038% carbon dioxide; trace amounts of other gases, and a changeable amount (average around 1%) of water vapor. This mixture of gases is usually known as air. The atmosphere protects life on Earth by captivating ultraviolet solar radiation and reducing temperature extremes between day and night.

There is no exact border between the atmosphere and outer space, it slowly becomes thinner and fades into liberty. Three quarters of the atmosphere's mass is within 11 km of the terrestrial surface. In the United States, people who travel above a height of 80.5 km (50 statute miles) are selected astronauts. An altitude of 120 km (400,000 ft) marks the boundary where atmospheric property becomes obvious during re-entry. The Kármán line, at 100 km (328,000 ft), is also often regarded as the boundary between atmosphere and outer space.