the circuit: Light Dependent Resistors Light Dependent Resistors (LDR) are also called photoresistors. They are made of high resistance semiconductor material. When light hits the device‚ the photons give electrons energy. This makes them jump into the conductive band and thereby conduct electricity. A photoresistor or light-dependent resistor (LDR) or photocell is a light-controlled variable resistor. The resistance of a photoresistor decreases with increasing incident light intensity; in other
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New cells arise by division of existing cells Cell division occurs in the nucleus of eukaryotic cells by mitosis and meiosis Replacement of the entire lining of your small intestine Liver cells only divide for repairing Nerve cells do not divide Chromosomes Long and thin for replication and decoding Become short and fat prior mitosis → easier to separate due to compact form Meiosis (reduction division) During the production of sex cells (gametes) in animals In spore formation which precedes
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With light therapy can reduce symptoms in depressed patients Winter certainly has a more sadly than other times. If you’re down in these months‚ may be suffering from seasonal affective disorder (SAD). In the US‚ people have fought depression with an extra dose of artificial light during the day. Now‚ a new study found that light therapy is effective for treating other types of depression as well. For example‚ people with SAD may have a feeling that lingers over the winter months‚ sometimes even
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Part I. Question 1 Aristotle uses two methods to prove light cannot travel. Besides his empirical explanation‚ where he observes that for the supposed motion of light to go “unnoticed from where the sun rises to where it sets is asking too much” (418b26)‚ he also provides an argument that is understood through the “light of reason.” (418b24) To understand his contention we must refer to his definitions of light and the transparent. The transparent is‚ for Aristotle‚ the medium of sight; it is “what
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Since only the very top of the ocean receives light from the sun‚ animals have difficulty using their eyes to find their way around in deeper waters. Once animals dive‚ they rely heavily on their hearing to sense their environment. In this essay I’m going to answer these questions by explaining in turn what light and sound are‚ but first we need to know what waves are in order to make it easy to understand the others. Waves exist in both sound and light. Or to make a better sense‚ it is what makes
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Without color or light‚ art would be nothing; we wouldn’t be able to see or distinguish anything. Light allows us to see the space about something; when it casts a shadow on something we know the size of something. Without color we wouldn’t be able to differentiate between anything. It allows us to see the edges of something which in turn allows us to form the relationships in size and space. Colors can also be used to accomplish a diverse sense of feelings. For example‚ artists can use colors to
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LIGHT IN PHOTOSYNTHESIS Theory: Leaf discs float normally. When the air spaces are infiltrated with the solution the overall density of the leaf disc increases and the disc sinks. The infiltration solution includes a small amount of sodium bicarbonate. The bicarbonate ions serve as the carbon source for photosynthesis. As photosynthesis proceeds oxygen is released into the interior of the leaf which changes the buoyancy – causing the discs to rise. Since cellular respiration is taking place
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the speed of light “So far as problems involving light are concerned‚ the electrons (in atoms) behave as though they were held by springs”.Feynman “In a microscopic but otherwise classical analysis‚ the electric field in electromagnetic radiation accelerates electrons held by springs in the atoms of a piece of glass‚ and these accelerated electrons re-radiate in all directions. The observed light is the superposition of the electric (and magnetic) fields of the incoming light and the re-radiation
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Bringing the Brand to Light Competitive Advantage Mountain Man Brewery Company (MMBC) at the time the case was written is an 80-year old‚ regional‚ family-owned brewery that produced one product: Mountain Man Lager. It is distinctive because it has a core target market of males from the middle to lower income range‚ aged 45 or older. It only has one product‚ Mountain Man Lager‚ versus its competitors which have a variety of options. One of the key features of MMBC is its image‚ in which it is
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Aim In this assignment I am going to carry out a practical examination on a plant (onion) and an animal (cheek) cell under a light microscope. The stain methods I am going to use are iodine for my onion cell and methylene blue for my cheek cell. Introduction All animals and plants are made up of cells. Animal and plant cells are made from millions of tiny cells‚ so small that we are unable to see them with our naked eye. Animals and plants have many features in common within a cell such
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