1. Introduction We live in a special space-time even if we human-beings don’t realize what it is. With the progress of modern science and technology, we understand the wider and longer world than we used to. Men recognize space from the largest galaxy to the smallest electron. Scholars also define time between the longest origin of some celestial bodies and the shortest particle annihilation. The research and development of space and time may always be the most difficult but vital part of the whole science, including the physics. Nowadays scientists use “meter” and “second” to be the scale of space and time. A leap of these researches is the birth of atomic clock which has defined “second” in a more precise way. As far as this article concerned, …show more content…
Perhaps the most familiar frequency is the orange glow from the sodium in table salt if it is sprinkled on a flame. An atom will have many frequencies, some at radio wavelength, some in the visible spectrum, and some in between the two. Cesium 133 is the element most commonly chosen for atomic clocks. To turn the cesium atomic resonance into an atomic clock, it is necessary to measure one of its transition or resonant frequencies accurately. This is normally done by locking a crystal oscillator to the principal microwave resonance of the cesium atom. This signal is in the microwave range of the radio spectrum, and just happens to be at the same sort of frequency as direct broadcast satellite signals. Engineers understand how to build equipment in this area of the spectrum in great detail. To create a clock, cesium is first heated so that atoms boil off and pass down a tube maintained at a high vacuum. First they pass through a magnetic field that selects atoms of the right energy state; then they pass through an intense microwave field. The frequency of the microwave energy sweeps backward and forward within a narrow range of frequencies, so that at some point in each cycle it crosses the frequency of exactly 9192631770 Hertz (Hz, or cycles per second). The range of the microwave generator is already close to this exact frequency, as it comes from an accurate crystal oscillator. When a cesium atom receives microwave energy at exactly the right frequency, it changes its energy
When deciding the server to be used for synchronizing its clock, a client should consider two main factors: 1. Reliability of the server The server should be highly reliable. It should be sending the correct time.
Atoms DBQ Atoms make up every object , substance, and material we know of(O.I). An atom is the smallest particle an element can be divided into. An atom has a complex structure, and the knowledge we have of it has changed many times throughout history. This tiny maze of parts has helped us learn important ideas about the structure and study of microscopic particles(O.I).
“The Cosmic Perspective” is successful
Without outside intervention, there is no tale to tell; in other words, there is only the Nothingness that has always remained a possibility in man’s encounter with the Universe. Unlike the preposterous pulp-fiction worlds of Mars and Venus created by Edgar Rice Burroughs, for example, where an energetic evolutionary force has created an elaborate hierarchy of intelligent beasts and beings, Clarke and Kubrick looked to outside intervention to spur the slow, steady state of terrestrial change. If the
Then the returned signals are processed and displayed on the screen, as either a real image or different artefacts. Using an ultrasound, this is a simplified way of understanding an image acquisition. In the following text, the principles of ultrasound generation from a piezoelectric crystal and physical properties governing image creation are discussed, with appropriate examples. The principle: The ultrasound works on Doppler Effect, which is based on work by Austrian physicist Johann Christian Doppler.
Albert Bierstadt made the space look like the individual observing the painting is actually there, because he used two point perspective in his work. Two point perspective is having two vanishing points within an artwork. Space helps someone picture the artwork more in depth. The shapes of the old mill, Mountains, and trees are flat and has light color. Value is the lightness or darkness of colors.
I am very thankful for the opportunity to intern at the Waterfront Public School and having the chance to work with two very different students with DD. This experience gave me a better understanding of how the Toronto District School Board (TDSB) employs DSWs and how they value our role within their classrooms. I was fortunate enough to work with a collaborative team of staff that encouraged my professional growth by allowing me to assess and implement new teaching strategies. This team also provided me with much needed feedback and criticism along the way, which I valued and learned from. In addition, this education support placement allowed me to fulfill many performance elements related to learning outcome seven of the DSW Program Manual.
Alan Lightman, a physicist, social entrepreneur, and creative writer of various works, including Our Place in the Universe: “Face to Face with the Infinite,” is written for the general public. This essay, takes the reader through humanity’s scientific discovery. For example, in his introduction, Lightman catches the reader’s attention by telling his own story so the readers can relate to it. Throughout the essay, the concept of size is predominant. Lightman conveys our place in the universe through the representation of a scale to let readers understand the universe.
So these would tend to have more reflections building up, to see that the biggest buildup is in the 400Hz band gives an idea how these materials can influence each other to resonate at a lower range than the previous
It is after two paragraphs exploring notions of man’s cosmic connection that Sagan asserts his first claim in the essay, “plainly there is no way back… we are stuck with science” (1). The compassionate tone persists even in assertions, as seen through the use of first person. More compassionate is the gentle acknowledgement of the pseudoscience appeal. “Yes, the world would be a more interesting place if there were UFOs lurking in the deep waters off Bermuda… or if our dreams could, more often than can be explained by chance and our knowledge of the world, accurately foretell the future” (1). This series of sentences ends the introduction.
Like most ancient civilizations, the Aztecs had a complex concept on how the world came to be, how gods set the Sun and Moon in the sky and were the purpose behind creation. What really divides the Aztec is the sheer amount of blood and death used. Blood made the Sun rise. Blood made the crops grow in the fields and without an endless amount of blood and sacrifices the Universe would grind to a halt and catastrophe would come to all humanity.
The observed emission data for the different elements did not look how they were supposed to. However the “peaks” for Hydrogen were found to be 534.52 and 631.24, 534.70 and 569.11 for Helium and 529.73 and 630.71 for Mercury. The Rydberg’s Constant found to 1.1x107 8.5x104 while the known constant is 10967758.34m-1. The percent error of 0.29% and the accuracy of this reading is 99.7. The slope and intercept of the linear regression line is -0.01 3.3x10-5 and 0.02x10-1 1.9x10-6 respectfully.
The Process of Reflection The process of reflection is central to clinical supervision. Launer (2003) describes external and internal factors in supervision whereby clinical practice and sharing skills are external and reflection is an ‘internal conversation.’ Brunero & Stein-Parbury (2008) discussed the effects of clinical supervision in nursing staff and argued that self-reflection generates a sense of self-awareness and knowledge to the individual. Supervisees or students may be asked what happened during a clinical event, how they felt, the implications of their actions and what they would do differently if faced with the same situation.
Introduction In this reflective essay I will reflect upon the course based on the assignments and projects I have accomplished this semester. Recent research (Kornblith, 2012:3) identifies that reflection is an active process and making sense of the experience through the understanding of one’s actions. As suggested by (Roberts, 2011:63) she states that the understanding of reflection have been used to develop an action stage, which can further help to improve my skills and knowledge towards my course. This is vital as it ensures that i get the most out of my learning experience and i could use them to their maximum benefit.