50 SCIENCE TRIVIA 50 Interesting Science Facts 1 – The speed of light is generally rounded down to 186‚000 miles per second. In exact terms it is 299‚792‚458 m/s (equal to 186‚287.49 miles per second). 2 – It takes 8 minutes 17 seconds for light to travel from the Sun’s surface to the Earth. 3 – 10 percent of all human beings ever born are alive at this very moment. 4 – The Earth spins at 1‚000 mph but it travels through space at an incredible 67‚000 mph. 5 – Every year‚ over one million
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“The evolution of the world can be compared to a display of fireworks that has just ended; some few red wisps‚ ashes and smoke. Standing on a cooled cinder‚ we see the slow fading of the suns‚ and we try to recall the vanishing brilliance of the origin of the worlds.” (Four Pillars‚ n.d.) The Big Bang theory is perhaps the greatest discovery of all time. The Big Bang is a cosmological model that explains how the universe came to be and is based on known and well-tested laws of physics. However
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Saturn produces its only heat and light energy by the friction of the helium rain which can be found in the atmosphere. It has a pale yellow colour because of the ammonia crystals which can be found in the outer atmosphere as well. It has a low surface gravity because it does not have a solid surface like Earth. Its rings
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many electrons do you suppose that bromine has in its outer orbit? 5a) Helium‚ neon‚ and argon behave similarly in chemical reactions. What do you notice about the outer orbit of electrons in these elements? Hint: How many electrons did Bohr say each element could have in its outer shell? b) Krypton has the same chemical behaviour as helium‚ neon and argon. Where is Krypton found on the periodic table in relation to helium‚ neon and argon? c) Using your answer in 5a) as a guide‚ explain what
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Experiment 1 The Heat Capacity Ratio of Gases Purpose The purpose of this experiment is to calculate the heat capacity ratio of gases‚ Helium‚ Nitrogen and Carbon Dioxide‚ and compare with their theoretical values. Introduction Thermodynamics is the study of heat as it relates to energy and work. There are various properties which all relate to each other when determining the characteristic of a certain substance. One of such properties is heat capacity‚ which is the amount of heat energy
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exist. Combining a pair of helium atoms with 1s2 electron configurations would produce a molecule with a pair of electrons in both the bonding and the * antibonding molecular orbitals. The total energy of an He2 molecule would be essentially the same as the energy of a pair of isolated helium atoms‚ and there would be nothing to hold the helium atoms together to form a molecule. The fact that an He2 molecule is neither more nor less stable than a pair of isolated helium atoms illustrates an important
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EXPLORING LOIHI: THE NEXT HAWAIIAN ISLAND Twenty-one miles off the Big Island‚ nearly 3‚000 feet beneath the waves‚ an island is struggling to be born. Researchers are taking submersibles to the very bottom of the sea to watch the process unfold. Quiet as a falling pebble‚ the Pisces V submersible begins its descent to the ocean floor. Soon the downwelling light wanes and the pilot and a pair of scientists inside are swallowed up in inky blackness - a darkness as absolute as interstellar space
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CHAPTER 10 Liquids and Solids 1. Order the intermolecular forces (dipole-dipole‚ London dispersion‚ ionic‚ and hydrogen-bonding) from weakest to strongest . a) dipole-dipole‚ London dispersion‚ ionic‚ and hydrogen-bonding b) London dispersion‚ dipole-dipole‚ hydrogen-bonding‚ and ionic c) hydrogen-bonding‚ dipole-dipole‚ London dispersion‚ and ionic d) dipole-dipole‚ ionic‚ London dispersion‚ and hydrogen-bonding e) London dispersion‚ ionic‚ dipole-dipole‚ and hydrogen-bonding Ans: b 2. Hydrogen
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Guess Paper – 2009 Class – X Subject – Chemistry (P- Block Elements) Kalra sir 09460472649 kalra1977@rediffmail.com Group 15 elements: |Symbol |Atomic |Electronic configuration | | |number | | | |7 |[He]2s22p3 | |N | | | |P |15 |[Ne] 3s23p3 | |As |33 |[Ar]3d104s24p3
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earth’s crust (including oceans and atmosphere). - In living things (plants‚ animals‚ people) the six most abundant elements are carbon‚ hydrogen‚ oxygen‚ nitrogen‚ phosphorus and sulfur. - The universe is dominated by the elements hydrogen (83%) and helium (16%) 1. The Crust The outside of the earth is a thin crust which is approximately 20 to 40km thick. The crust is a formation of dips and hollows which are filled with water to form the oceans and seas. On top of the earth’s crust is an atmosphere
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