...In light of continued strong economic growth in emerging countries such as China and India and stagnant growth in much of the Euro zone, use economic theory to explain (I) why countries experience different growth rates, and (II) why we might expect poor countries to grow more quickly than rich countries. There is a huge diversity of how economies expand. Some countries manage to grow at a remarkably fast pace, while others suffer failures almost every time they attempt to improve. In order to explain why countries experience different growth rates and also why poor countries experience growth at a faster rate than rich countries one will have to take a look at the economic theories for this aspect. Firstly, economic growth can be defined as the increase of goods and services, which an economy produces over time. The first theory to go through is the traditional growth theory, which concentrates on the accumulation of physical capital, which explains why some countries are much wealthier now than a century ago. That only scratches the surface, however, as modern economies differentiate from those a century ago, due to the advance in technology resulting in better infrastructure and machinery, producing better goods more efficiently. The neo-classical model of Solow was unable to explain this, treating it as exogenous. ( Sérgio Rebelo, “Why Do Growth Rates Differ?”) Thus the endogenous theory came in to shine light on the matter. It originated from the studies of Paul Romer...
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...Why is the sky blue? Have you ever wondered why our sky is blue? The molecules in our atmosphere are made up of about 78% nitrogen, 21% oxygen, .7% argon, and a small amount of trace gases. White light from our sun is made up of all the colors in the rainbow from red to violet. When the light hits our atmosphere the molecules scatter blue light more than red or green etc. so we see a blue sky! Let's do an experiment to see the effect of scattering, and some other properties of light. Get as many of the following materials as possible: A 1 liter beaker or 1 qt glass jar (a 12 oz glass will do), some milk, a laser pointer or other low power laser, a prism or diffraction grating and some lenses, and a lab notebook to record your observations. Fill the beaker with cold tap water and shine your laser through it. Mix 2-3 drops of milk into the water. Take the mixture into a dimly lit, or dark, room. Shine the laser through the side of the beaker and look through the top of the beaker, jar, or glass. What do you see? The mixture you made is called a colloidal suspension. Now shine the laser up through the side of the beaker toward the center of surface of the suspension. [Physics FAQ] - [Copyright] Original by Philip Gibbs May 1997. Why is the sky blue? A clear cloudless day-time sky is blue because molecules in the air scatter blue light from the sun more than they scatter red light. When we look towards the sun at sunset, we see red and orange colours because the blue...
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...quantitatively determine the amount of light absorbed by a solution. The primary inner parts of a typical spectrometer are described below. The spectrometer has a light source that emits white light containing a vast mixture of different wavelengths of electromagnetic radiation. The wavelength of interest is then selected using a monochromator (“mono” meaning one and “chromate” meaning color) and an additional exit slit. The separation of white light into different colors (wavelengths) is known as diffraction. The selected light then reaches the sample and depending on how the light interacts with the chemical compound of interest, some of the light is absorbed and some passes straight through. By comparing the amount of light entering the sample (P0) with the amount of light reaching the detector (P), the spectrometer is able to tell how much light is absorbed by the sample. Define all of the bold words in the previous paragraph. (4 points) Spectrometer: an optical instrument that can detect spectral lines. It measures it’s wavelength and intensity. Quantitatively: something that is part of the metric system, can be given a numerical value. Electromagnetic radiation: radiation that includes radio waves, visible light, x-rays and gamma rays, where the magnetic and electric fields vary at the same time. Monochromator: an optical instrument that transmits a mechanically selectable narrow band of wavelengths of light or other radiation which is chosen...
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...and why does it always disappear as the observer gets closer? A mirage is a naturally occurring optical phenomenon in which light rays are bent to produce a displaced image of distant objects or the sky. Mirages appear at very low viewing angles, when you are far away. As you approach, the viewing angle increases and the mirage disappears, or moves farther away. The reflection of heat dissipates in the human eye causing the mirage or blur to vanish. 3) If you were looking for a rainbow in the morning, which direction (N, S, E, W) would you face and why? It is best to look towards the west. Rainbows always appear in the opposite side of the sky away from the sun. 4) What is a halo? A Halo is a burst of light produced by ice crystals creating colored or white arcs and spots in the sky. Many are near the sun or moon but others are elsewhere and even in the opposite part of the sky. They can also form around artificial lights in very cold weather when ice crystals called diamond dust are floating in the nearby air. 5) Why is the sky blue? The sky is blue because molecules in the air scatter blue light from the sun more than they scatter red light on a cloudless day. When we look towards the sun at sunset, we see red and orange colors because the blue light has been scattered out and away from the line of sight. 6) Why are sunrises and sunsets red/orange? Because the light from the sun has passed a long distance through air and some of the blue light has been...
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...Pre-Lab Questions 1. Nitrogen fixation is a natural process by which inert or unreactive forms of nitrogen are transformed into usable nitrogen. Why is this process important to life? The useable nitrogen created, is extremely important since it is used to form DNA, enzymes, and other biological processes. Nitrogen fixation is also important because when it is inert, it is useless for organisms. 2. Given when you have learned about the hydrogen bonding shared between nucleic acids in DNA, which pair is more stable under increasing heat: adenine and thymine, or cytosine and guanine? Explain why. Adenine and thymine are more stable because, the additional carbon bonds make their nucleotides more stable. 3. Which of the following is not an...
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...Study Assignment 2 Prof. Griffith 1. Why would Captain Mueller and his copilot sit in darkness for an extended period of time before taking off on a night flight? Be sure to describe in detail the parts of the eye and the processes involved that explain why this was a useful step for the pilot and copilot to take. * Captain Mueller and his copilot would sit in darkness before taking off on a night flight so their eyes would already be adjusted to the darkness. Adaption is defined as an adjustment in sensory capacity after prolonged exposure to unchanging stimuli. By shutting off the light before they take off, they would be changing their frame of reference. This is commonly referred to as dark adaption which is the phenomenon of adjusting to dim light after being in brighter light. The rate at which dark adaption occurs is a result of the change in the chemical composition of the rods and cones. The rods take 20-30 minutes to reach their maximum level, while cones reach their greatest level of adaption in just a few minutes. If this would have occurred, their pupil size would have changed. The size of the pupil opening depends on the amount of light in the environment. In a dimmer environment, the pupil opens to allow more light to enter. Although, wide-opened pupils have a harder time of discerning things. 2. Why would the mysterious object have first appeared to Mueller in his peripheral vision? * After the light travels through the pupil and lens, the image...
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...something; two is that tortfeasor breached the duty, based on the applicable standard of care that he/she is owed; three is that tortfeasor action or inaction is the proximate cause of the injured party's injury; four is the injured party has in fact suffered some type of injury (physical, mental, monetary). In the scenario case of the Rob Jr. v Church of the Divine Light, there are many causes where the family can be compensated for damages of intentional. Some of the causes that Rob Jr. can take against the Church of the Divine Light are mental stress because Rob Jr. was brained washed by the Church of the Divine Light and took several weeks for him to recover his sanity, false imprisonment because the Church of the Divine Light tricked Rob Jr. believing he would go to hell if he left the church, and that that was his new family and that his family did not care for him any longer, intentional infliction of mental distress, and emotional stress because of the recovery of being brainwashed, and to understand that his true family did love him. The causes the parents of Rob Jr. can take against the Church of the Divine Light are financial stress only several reasons because they were giving money to their son Rob Jr. to support him at the church even though they probably knew that it was not going towards their sons needs and they did not know if they did not pay if their son would be harmed or not and also because it...
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...three symbols that will be mentioned are the green light at the end of Daisy dock, Daisy, and Dr. Eckleburg’s billboard in the valley of ashes. First off is the green light at the end of Daisy dock, which serves as a symbol of hope for Gatsby throughout the story. The reader can see this when Gatsby says, “’ If it wasn’t for the mist we could see’…’you always have a green light that burns all night at the...
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...The Going, the first of the 1912-1913 poems on the death of Emma Hardy on 27 November, 1912 Why did you give no hint that night That quickly after the morrow's dawn, And calmly, as if indifferent quite, You would close your term here, up and be gone Where I could not follow With wing of swallow To gain one glimpse of you ever anon! Never to bid good-bye Or lip me the softest call, Or utter a wish for a word, while I Saw morning harden upon the wall, Unmoved, unknowing That your great going Had place that moment, and altered all. as if you didn’t care end your time alive ever anon – ever again lip me – give, with your lips Why do you make me leave the house And think for a breath it is you I see At the end of the alley of bending boughs Where so often at dusk you used to be; Till in darkening dankness The yawning blankness Of the perspective sickens me! You were she who abode By those red-veined rocks far West, You were the swan-necked one who rode Along the beetling Beeny Crest, And, reining nigh me, Would muse and eye me, While Life unrolled us its very best. Why, then, latterly did we not speak, Did we not think of those days long dead, And ere your vanishing strive to seek That time's renewal? We might have said, "In this bright spring weather We'll visit together Those places that once we visited." the cliffs near St Juliot, Cornwall swan-necked – long beautiful neck beetling - projecting ere - before Well, well! All's...
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...March 2011 Lighting: The Way it Affects a Movie Set Lights! Lights! And More Lights! While on a movie set for any show, cinematographers are artists that paint motion pictures with light (Murphy 1). They must know that lighting is their main concern while in production. No matter if there is too much or too little lighting, lighting must always be controlled (Morales). In order to solve the problem of faulty lighting, cinematographers should know when lights should be used, where it should be placed, and who it should be focused on; therefore, they must communicate with the director and the lighting engineer at all times because the lighting sets the mood for the image (Morales). There are many techniques that a cinematographer works with and people wonder how. An example is that most people wonder how cinematographers control their lighting while indoors when the subject is placed by a window. If subject is in front of a window and there is too much sunlight, take some aluminum foil wrapped around a piece of cardboard and turn it towards the subject so the light will reflect on the person face which will act as a key or filled light. If there is another light around, put it a little closer to subject and the reflected light will act as the backlight to make it seem as three-point lighting (“Lighting Tricks and Solutions”). The need for this type of lighting is to make the subject’s face is clear and visible. If the light from the window is shinning on the subject too much...
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...Why is the sky blue? Many people ask this question and we think they come across as silly or young. But the ironic thing is, is that this question touches on some of the deepest aspects of astronomy and skygazing (Sky-Watch). The question is what causes us to see the sky as blue? There are a variety of answers and not necessarily all of them being true, like when you tell a child that it’s because God spilled his water. The sky is blue because of the wavelength of the colors in the electromagnetic spectrum, the atmosphere of Earth, and our eyes. Many people believe that the sky is light blue just because they have grown up to think only about the color blue when they are asked about the sky. But scientific studies show that the light from the Sun is all the colors of the rainbow. (Note card 3) The light travels in waves and consists of weightless particles that are moving around 200,000 kilometers per second (Sky-Watch). The range of light that our eyes can see is the electromagnetic spectrum. Each color in the spectrum has a different frequency-which is the number of cycles per second. The frequency of light is determined by color. For example, blue light has a shorter and highter frequency than the others. Furthermore, now you know that the light waves coming from the Sun contain all the colors with different frequencies and that the light with a lower frequency has a longer wavelength. For my second point, it is our atmosphere on Earth. In suppor of this we know that...
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..................................... ....................................................................... ....................................................................... (b) Explain how accommodation is achieved by the eye. ....................................................................... ....................................................................... ....................................................................... ....................................................................... [2] 8810-6506 0231 – 3 – A2. This question is about diffraction and resolution. (a) N10/4/PHYSI/SP3/ENG/TZ0/XX A parallel beam of monochromatic light is incident on a narrow rectangular slit. After passing through the slit, the light is...
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...leaves. One of the main pigments in leaves is chlorophyll and it absorbs the red and blue light from sunlight that falls on leaves; hence, the leaves reflect the "green light" and that is why leaves appear to be green. The chlorophyll is part of a bigger structure called chloroplasts. Photosynthesis, a process in which plants transform solar energy into chemical energy, takes place in the chloroplast; furthermore, it is thanks to this chemical energy that plats produce seeds, grow and flower. However, chlorophyll is not a stable compound because sunlight causes it to decompose; hence, plants have to synthesize it continuously. Nevertheless, this "synthesis" requires sunlight and warm temperatures and that is the reason why it is scarce during autumn. Carotene is another pigment found in plants; it absorbs blue and blue-green light and hence the light reflected from it appears to be yellow. Carotene is found in the chloroplasts of many plants and when it is paired with chlorophyll both absorb many "lights" and therefore the plant looks green. The light carotene absorbs is transferred to chlorophyll which uses it during photosynthesis. This compound is a lot more stable than chlorophyll and it remains in the plant eve after chlorophyll is absent. At this point the plant appears to be yellow. Anthocyanins is pigment that absorbs blue, blue-green, and green light and the light reflected by it causes for the plant to look RED. Anthocyanins, unlike chlorophyll and carotene...
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...Plastics are all around us. There are many different kinds, with a wide range of properties. Some are hard, others are soft. Some are transparent, others are opaque. Most plastics are made in factories, but here’s one you can make at home. For this experiment you will need: * 1 teaspoon (5 cm3) laundry borax * 1 tablespoon (15 mL) white glue (e.g., Elmer's Glue-All) * food coloring (optional) * two cups * spoon * water Here's what to do: 1. In one of the cups, dissolve 1 teaspoon of laundry borax in 5 tablespoons (75 mL) of water. You will need to stir this for a while to get it to dissolve. (If a tiny bit does not dissolve, that is OK.) 2. In the other cup, combine 1 tablespoon of water and 1 tablespoon of white glue. If you wish, you may color the mixture with a couple drops of food coloring. With a clean spoon, stir the mixture thoroughly until it is uniform. 3. Put 2 teaspoons of the borax solution from the first cup into the glue mixture in the second cup. Stir the mixture. 4. As you stir the mixture, it will stiffen into a soft lump. After the lump has formed, take it from the cup and knead it in your hand for a couple minutes. The material you have made is called Gluep, and it is ready for you to examine. * Roll the Gluep into a ball and then let it rest. Does the ball maintain its shape? * Drop a Gluep ball onto a table top. What does the ball do? * Flatten the Gluep into a thin strip. Hold up the strip by one end. What...
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...Both the first and second argument are supported by facts and opinions. The first argument by Councilman Lorenzo Hart informs us that automatic traffic light cameras should be installed at 10 major intersections, while the second argument by Baler Herald informs us that installing automatic traffic light cameras is a waste of money. While both sides give good points it is the second argument by Lorenzo Hart that is the stronger argument. One example why the first argument is stronger than the second argument is the explanation that automatic traffic cameras will photograph the license plates of automobiles running red lights. In addittion, the town then sends traffic tickets to the violators. This will allow the police to focus on other...
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