plants. The uptake of water by plant cells creates a pressure against the rigid ce ll wall. This turgor pressure helps non-woody plants to remain upright. Water has a high specific tension and water molecules have cohesive forces holding them together‚ due to hydrogen bonding between water molecules. This allows water to be pulled through xylem in plants. It is also a transport medium‚ just like in animals‚ substances‚ such
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Discuss why hydrogen bonding is essential for life Throughout biochemistry there are many bonds without which life as it is on earth today would not be possible. One of the most important bonds of these is the hydrogen bond‚ a weak chemical bond that is present in essential biological molecules such as water and polypeptides. A hydrogen bond is defined by Campbell and Reece as occurring when a hydrogen atom is covalently bonded to an electronegative atom but attracted to another electronegative
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Pit Bulls can be good pets and should not be banned The Breed Specific Legislation is a set of laws that are being put into place to restrict and euthanize all dogs that have been determined as lethal‚ aggressive and viscous. This ban has targeted a specific breed of dog‚ the Pit Bull. This breed includes the American Staffordshire Terrier (AmStaff)‚ the American Pit Bull Terrier (APBT)‚ the Bull Terrier‚ the Staffordshire Bull Terrier‚ Miniature Bull Terrier and the American Bulldog. The concern
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Putting the myths to rest When the subject of the American Pit Bull Terrier* comes up‚ the issue of nature vs. nurture is always a hot topic. Over the years‚ varying schools of thought have evolved with respect to the dog fighting heritage of the bull breed and their inclination toward aggressive behavior. Before we go any further‚ let ’s get one thing out of the way right off the bat. Throughout history‚ many breeds of dogs were used in dogfighting. The Romans fought dogs in their great arenas
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between art and the socio-historical dimensions of specific places. A memory can be a reconnection of a place‚ thus establishing authenticity of meaning‚ history and identities. This adherence to memory is represented in one of Rachel Whiteread’s most famous works House. She chose to carry out a concrete cast of the inside of an entire Victorian house – 193 Grove Road - that was supposed to be demolished due to city developments. The site-specific piece gives itself up to its environmental context
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provides a durable statement discussing the great effects of prostate-cancer tests‚ “Several new prostate-cancer tests aim to reduce needless biopsies and unnecessary treatments by sorting out harmless from aggressive tumors” (qtd. Beck 1). Prostate-specific antigen (PSA) can elevate your level of conditions other than cancer such as‚ benign prostatic hyperplasia (BPH) and prostatitis. With the results from the screening‚ it could help treat the cancer easier and more likely to be cured if it’s diagnosed
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capturing the heat released to a known mass of water in a calorimeter. If you measure the initial and final temperatures‚ the energy released can be calculated using the equation: Q = m × c × ΔT where Q = heat absorbed (in J)‚ m = mass (in g)‚ c = specific heat capacity (4.184 J/g°C for water)‚ and ΔT = change in temperature (in °C). Dividing the resulting energy value by grams of food burned gives the energy content (in J/g). Pre-Lab: 1. Complete the PURPOSE below. 2. Make a HYPOTHESIS below:
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this potential is on the rise. Acting on the behalf of public safety‚ state and local legislators are mounting an attack on man’s best friend and singling out certain breeds as targets of their vendettas. Law makers are attempting to enact breed specific bans based on skewed and inconclusive statistics and prejudices fueled by biased reports created in the news media‚ while at the same time they are failing to address what is causing this problem; irresponsible dog owners. A more comprehensive
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temperature‚ the energy is used in breaking bonds in the structure of the material while changing state. * Explain why steam burns are more painful than boiling water burns. Because the steams contains extra heat energy than boiling water due to its specific latent heat of vaporization. Latent heat of vaporization is the energy given out or taken in when a substance changes state from liquid to gas or from gas to liquid with no temperature change in the system. The temperature of boiling water is 212
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(temperature) difference. * c. What quantity of heat was transferred from one sample to the other? Answer: Here heat transfer from hot water to cold water. Mass of hot water (m) = 200g Initial temperature (T) = 80˚C Finial temperature (T2) = 60˚C Specific heat of water (s) = 4.18 J/g˚C ∆T=(60-80)℃ = - 20˚C Heat transfer from hot to cold water is q. q = ms∆T = 200g * 4.18J/g˚C * -20˚C = -16720J = -16720 * 10-3kJ q = -16.72kJ (1J = 10-3kJ) Therefore heat transfer from
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