ASTR-1020: Astronomy II Course Lecture Notes Section XI
... 1. If the Universe is static, infinite, and eternal, we should light in every direction we look. [Why do you think this should be the case?] 2. The Universe is expanding (hence not static) and is not eternal! =⇒ Big Bang Theory — it had a beginning! a) Light gets redshifted out of the visible band. ...
... 1. If the Universe is static, infinite, and eternal, we should light in every direction we look. [Why do you think this should be the case?] 2. The Universe is expanding (hence not static) and is not eternal! =⇒ Big Bang Theory — it had a beginning! a) Light gets redshifted out of the visible band. ...
- Department of Chemistry, York University
... NB: C4H- would be very interesting because C4H is massively abundant in IRC+10216. The cyanopolyynyl radicals like C5N are also very promising because they have EA values of 4 eV or more, so attachment is very favourable, but these radicals aren't as abundant as CnH radicals. ...
... NB: C4H- would be very interesting because C4H is massively abundant in IRC+10216. The cyanopolyynyl radicals like C5N are also very promising because they have EA values of 4 eV or more, so attachment is very favourable, but these radicals aren't as abundant as CnH radicals. ...
The Double Slit Experiment and Quantum Mechanics∗
... This latest particle behavior is quite distinct from that of sound waves. If we measured how much of sound wave energy went through each slit, we would find that the sound wave split its energy equally between the slits and still formed a double slit pattern. Particles on the other hand, choose one ...
... This latest particle behavior is quite distinct from that of sound waves. If we measured how much of sound wave energy went through each slit, we would find that the sound wave split its energy equally between the slits and still formed a double slit pattern. Particles on the other hand, choose one ...
Chapter 12 (Electrostatics) Short Answers
... Ans. An electric motor produces induced emf due to its rotation inside the magnetic field which is also the property of the generator. Hence in this sense we can say that it acts like a generator. According to Lenz’s Law the induce emf will reduce the speed of electric motor. Q.12 Can a D.C. motor b ...
... Ans. An electric motor produces induced emf due to its rotation inside the magnetic field which is also the property of the generator. Hence in this sense we can say that it acts like a generator. According to Lenz’s Law the induce emf will reduce the speed of electric motor. Q.12 Can a D.C. motor b ...
Calculations with Chemical Formulas and Chemical Reactions
... The term molecular weight is generally reserved for substances that exist in water solution as discrete molecules. Formula weight is used for substances that ionize or dissociate when dissolved in water, ...
... The term molecular weight is generally reserved for substances that exist in water solution as discrete molecules. Formula weight is used for substances that ionize or dissociate when dissolved in water, ...
Spin splitting in open quantum dots and related systems Martin Evaldsson Link¨
... the microscopic world of molecular electronics, the need to name an intermediate region has come about. This region is now labelled mesoscopic, where the prefix derives from the Greek word “mesos”, which means ‘in between’. Mesoscopic systems are small enough to require a quantum mechanical descript ...
... the microscopic world of molecular electronics, the need to name an intermediate region has come about. This region is now labelled mesoscopic, where the prefix derives from the Greek word “mesos”, which means ‘in between’. Mesoscopic systems are small enough to require a quantum mechanical descript ...
PDF - mockies – Mockiesgateacademy
... race, people have struggled to make sense of the world around them. Through the branch of science we call chemistry we have gained an understanding of the matter which makes up our world and of the interactions between particles on which it depends. The ancient Greek philosophers had their own ideas ...
... race, people have struggled to make sense of the world around them. Through the branch of science we call chemistry we have gained an understanding of the matter which makes up our world and of the interactions between particles on which it depends. The ancient Greek philosophers had their own ideas ...
Grade 11 review answers
... 37) Nitrogen tri-iodide will explode at the slightest contact to produce Nitrogen gas and Iodine gas in the following reaction: 2NI3(s) —> N2(g) + 3I2(g) If 15.5 g of NI3 explodes at a temperature of 25.5 oC and a pressure of 100.3 kPa. a) What volume of gas will be produced? We will ignore part b f ...
... 37) Nitrogen tri-iodide will explode at the slightest contact to produce Nitrogen gas and Iodine gas in the following reaction: 2NI3(s) —> N2(g) + 3I2(g) If 15.5 g of NI3 explodes at a temperature of 25.5 oC and a pressure of 100.3 kPa. a) What volume of gas will be produced? We will ignore part b f ...
Electricity: 1) Static electricity 2) Electrical charges and its properties
... these materials are classified as elements and compounds. The smallest particle of the element is known as ‘atom’ and smallest particle of the compound is known as ‘molecule’. Molecules are formed when two or more than two atoms come together under specific conditions. We also know that the ‘atoms a ...
... these materials are classified as elements and compounds. The smallest particle of the element is known as ‘atom’ and smallest particle of the compound is known as ‘molecule’. Molecules are formed when two or more than two atoms come together under specific conditions. We also know that the ‘atoms a ...
無投影片標題
... quantized. And for the one-electron atom, the probability of finding the electron at a particular distance from the nucleus is not localized at a given radius. Consider two atoms that are in close proximity to each other. The wave functions of the two atom electrons overlap, which means that the t ...
... quantized. And for the one-electron atom, the probability of finding the electron at a particular distance from the nucleus is not localized at a given radius. Consider two atoms that are in close proximity to each other. The wave functions of the two atom electrons overlap, which means that the t ...
Applying Newton`s Laws of Motion
... Which is more difEcult to stop: A tractor-trailer truck barreling down the highway at 35 meters per second, or a small two-seater sports car traveling the same speed? You probably guessed that it takes more force to stop a large truck than a small car. ln physics terms, we say that the tuck has gtea ...
... Which is more difEcult to stop: A tractor-trailer truck barreling down the highway at 35 meters per second, or a small two-seater sports car traveling the same speed? You probably guessed that it takes more force to stop a large truck than a small car. ln physics terms, we say that the tuck has gtea ...
CHEMISTRY SEC 06 SYLLABUS
... Paper I consists of a written paper and a practical component and is to be taken by all candidates registered for the examination; the practical component is assessed separately by a continuous method during the course of instruction. There will be two versions of Paper II: Paper IIA and Paper IIB. ...
... Paper I consists of a written paper and a practical component and is to be taken by all candidates registered for the examination; the practical component is assessed separately by a continuous method during the course of instruction. There will be two versions of Paper II: Paper IIA and Paper IIB. ...
Chapter 3
... units; instead, they exist as molecules—two or more atoms of the element bonded together. • There only seven diatomic elements and they are H2, N2, O2, F2, Cl2, Br2, and I2. • Also, P4 and S8 are polyatomic elements. © 2014 Pearson Education, Inc. ...
... units; instead, they exist as molecules—two or more atoms of the element bonded together. • There only seven diatomic elements and they are H2, N2, O2, F2, Cl2, Br2, and I2. • Also, P4 and S8 are polyatomic elements. © 2014 Pearson Education, Inc. ...
the powerpoint
... component parts of the substances Chemical formulas are constructed from the symbols of the elements composing the substances. • In a chemical formula, the numbers as subscripts show how many of each kind of atom are in the compound. • The subscript is written to the lower right of the element symbo ...
... component parts of the substances Chemical formulas are constructed from the symbols of the elements composing the substances. • In a chemical formula, the numbers as subscripts show how many of each kind of atom are in the compound. • The subscript is written to the lower right of the element symbo ...
- GPW Morni, Panchkula
... 2. The Assignment Response should be hand-written and use only A-4 or foolscap size writing paper (but not of very thin variety) for writing your answers. 3. Leave at least 4 cm margin on the left, top and bottom of your answer sheet for the evaluator’s comments. 4. Your answers should be brief, pre ...
... 2. The Assignment Response should be hand-written and use only A-4 or foolscap size writing paper (but not of very thin variety) for writing your answers. 3. Leave at least 4 cm margin on the left, top and bottom of your answer sheet for the evaluator’s comments. 4. Your answers should be brief, pre ...
Atomic theory
In chemistry and physics, atomic theory is a scientific theory of the nature of matter, which states that matter is composed of discrete units called atoms. It began as a philosophical concept in ancient Greece and entered the scientific mainstream in the early 19th century when discoveries in the field of chemistry showed that matter did indeed behave as if it were made up of atoms.The word atom comes from the Ancient Greek adjective atomos, meaning ""uncuttable"". 19th century chemists began using the term in connection with the growing number of irreducible chemical elements. While seemingly apropos, around the turn of the 20th century, through various experiments with electromagnetism and radioactivity, physicists discovered that the so-called ""uncuttable atom"" was actually a conglomerate of various subatomic particles (chiefly, electrons, protons and neutrons) which can exist separately from each other. In fact, in certain extreme environments, such as neutron stars, extreme temperature and pressure prevents atoms from existing at all. Since atoms were found to be divisible, physicists later invented the term ""elementary particles"" to describe the ""uncuttable"", though not indestructible, parts of an atom. The field of science which studies subatomic particles is particle physics, and it is in this field that physicists hope to discover the true fundamental nature of matter.