Evolution of the Earth The planet earth has gone through much abuse and punishment in the past. Formed approximately 4.5 billion years ago‚ the earth has undergone multiple catastrophic asteroids erasing species after species. Due to geologic evidence‚ it is estimated over 90 percent of all life that had ever lived in this planet have been extinct. No more than the past 500 million years alone‚ 50-90 percent of all organisms on earth were wiped out of the geological timeline without any warning
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" Everyone knows the importance of our nature. It consists of all the living beings in earth‚ which are mutually dependent on each other. But due to the pollution caused by human beings‚ many species are becoming extinct and the global climate is also changing at a very fast rate. It’s influencing our health and also going to give a long term effect on our future. We know that millions of people in the earth depend on forest for their livelihood. Every living being is dependent on trees. Only the
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GAS DYNAMICS AND JET PROPULSION 1. What is the basic difference between compressible and incompressible fluid flow? Compressible 1. Fluid velocities are appreciable compared with the velocity of sound 2. Density is not constant 3. Compressibility factor is greater than one. 2. Write the steady flow energy equation for an adiabatic flow of air. In an adiabatic flow q = 0. Therefore energy equation becomes. 2 c12 c2 h1 + + gZ1 = h2 + + gZ 2 + Ws 2 2 Incompressible 1. Fluid velocities are small
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Chapter 3: FLUID FLOW CHAPTER THREE FLUID FLOW 3.1 3.2 3.3 3.4 3.5 Fluid Flow Unit Pump Test Unit Hydraulics bench and accessories Flow Curve Determination for Non-Newtonian Fluids Fixed and Fluidized Bed Facts which at first seem improbable will‚ even in scant explanation‚ drop the cloak which has hidden them and stand forth in naked and simple beauty. GALILEO GALILEI 1 3.1. FLUID FLOW UNIT Keywords: Pressure loss‚ straight pipe‚ pipe bend‚ orifice meter‚ venturi meter
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Snowball earth is when the Earth was covered by ice and snow from pole to pole for long periods of time in the past. The average temperature on the surface was about -50° and at the equator it was about -20°‚ which is roughly the temperature of Antarctica today. This is because the solar radiation from the Sun is reflected back into space due to the icy surface of the Earth. The oceans play a major role on the temperature fluctuation associated with day and night and because the oceans have a layer
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Planet Earth contains three compositional layers- CORE‚ MENTLE & CRUST. Core: At the centre is the densest of the three layers‚ the core. The core is a spherical mass‚ composed largely on metallic iron‚ with lesser amount of nickel and other elements. Mantle: The thick shell of dense‚ rocky matter that surrounds the core is mantle. The mantle is less dense than the core but denser than the outer most layer‚ the crust. Crust: Above the mantle lies the thinnest and outermost layer‚ the crust
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Join United Earth‚ Create a United Earth Government. Save the Earth with the People‚ Animals‚ Environment‚ Plants‚ Natural Habitat‚ Natural Resources‚ Act against Disasters‚ Poverty‚ Cruelty‚ War‚ Population Explosion and Establish Justice‚ the Critical Issues facing the Earth. Establish a New World Order‚ One World Government‚ United Earth Government‚ United Earth Court‚ United Earth Security and Peace Keeping Force‚ Ratify and Implement Earth Law. Assure Safe‚ Secure‚ Peaceful‚ Healthy
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Earth Day is an annual event‚ celebrated on April 22‚ on which day events worldwide are held to demonstrate support for environmental protection. It was first celebrated in 1970‚ and is now coordinated globally by the Earth Day Network and celebrated in more than 192 countries each year. In 1969 at a UNESCO Conference in San Francisco‚ peace activist John McConnell proposed a day to honor the Earth and the concept of peace‚ to first be celebrated on March 21‚ 1970‚ the first day of spring in the
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The Earth experiences tides in its oceans‚ by gravitational interaction between the Earth‚ Moon and Sun. The Moon is the biggest factor of tides occurring. It has 2.2 more power on tides than the sun does. The Moon and earth apply a gravitational pull on each other‚ and since most things on earth is pinned down they stay in place. But‚ the oceans being fluid can be pulled toward the moon causing tides.And since the earth is rotating while this is happening‚ two tides occur each day. While the Sun
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The atmosphere is practically everything above the Earths surface. It starts at ground level and then just goes on upward‚ getting thinner and colder until it finally dissolves into space. The atmosphere makes our world livable. It is responsible for winds‚ weather‚ temperature and a lot more features that make the Earth different than other planets. Without it‚ the Earth would be more like the moon. From a general point of view‚ the atmospheres composition seems simple. It contains oxygen produced
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