Monday, March 9, 2020
Life Cycle of The Queen Bumblebee
Life Cycle of The Queen Bumblebee There are more than 255 species of bumblebees worldwide. All share similar physical features: they are round and fuzzy insects with short wings which flap back and forth rather than up and down. Unlike honey bees, bumblebees are not aggressive, are unlikely to sting, and produce relatively little honey. Bumblebees are, however, major pollinators. Beating their wings as fast as 130 times per second, their large bodies vibrate very quickly. This movement releases pollen, helping crops to grow.Ã Ã The health and well-being of a bumblebee colony depend very largely on the queen bee. The queen, alone, is responsible for bumblebee reproduction; the other bees in the colony spend the majority of their time caring for the queen and her offspring. Unlike honey bees, which overwinter as a colony by clustering together, bumblebees (Genus Bombus) live from spring to fall. Only the fertilized bumblebee queen will survive the winter by finding shelter from the freezing temperatures. She spends the long, cold winter hidden away alone.Ã The Queen Bumblebee Emerges In spring, the queen emerges and searches for a suitable nest site, typically in an abandoned rodent nest or small cavity. In this space, she builds a ball of moss, hair, or grass, with a single entrance. Once the queen has constructed a suitable home, she prepares for her offspring. Preparing for Bumblebee Offspring The spring queen builds a wax honey pot and provisions it with nectar and pollen. Next, she collects pollen and forms it into a mound on the floor of her nest. She then lays eggs in the pollen and coats it with wax secreted from her body. Like a mother bird, the Bombus queen uses the warmth of her body to incubate her eggs. She sits on the pollen mound and raises her body temperature to between 98Ã ° and 102Ã ° Fahrenheit. For nourishment, she consumes honey from her wax pot, which is positioned within her reach. In four days, the eggs hatch. The Queen Bee Becomes a Mother The bumblebee queen continues her maternal care, foraging for pollen and feeding her offspring until they pupate. Only when this first brood emerges as bumblebee adults can she quit the daily tasks of foraging and housekeeping. For the remainder of the year, the queen concentrates her efforts on laying eggs. Workers help incubate her eggs, and the colony swells in number. At the end of summer, she begins laying some unfertilized eggs, which become males. The bumblebee queen allows some of her female offspring to become new, fertile queens. The Bumblebee Circle of Life With new queens ready to continue the genetic line, the bumblebee queen dies, her work complete. As winter approaches, the new queens and males mate. The males die soon after mating. The new generations of bumblebee queens seek shelter for the winter and wait until the following spring to begin new colonies. Many species of bumblebees are now endangered. There are many possible reasons for this, ranging from pollution and habitat loss to climate change.
Saturday, February 22, 2020
Saudi arabia running dry Essay Example | Topics and Well Written Essays - 1000 words
Saudi arabia running dry - Essay Example The depletion of the earthââ¬â¢s natural resources is due to human activities. Identification of the economic natural resources such as oil has led subsequent depletion of other resources for instance, people clear the forest to create room for mining of oil underground yet forest are rain catchment areas (hindering effective production of hydroelectric energy); hence, leading not only to the exhaustion of oil, but also the emergence of the desert, yet some of these resources are non-renewable (Gonzalez, 4). The author of this book was motivated to do the research in order to understand the extreme shifts in oil prices, future durability of oil, the impact it has on the environment and what should be done. The argument of this book is that economically valuable natural resources such as oil has led to Saudi Arabia running dry. In the process of mining, oil there is interference of other fundamental natural resources such as land, water and forest. There is the use of chemicals on the land, leaving it infertile; cutting down the forest to create more space for extracting the oil these have led to less water availability and food insecurity posing threat in the economy. The book also gives factors to put into consideration, to change the situation. It talks about the population growth-over population puts pressure on the limited natural resources, leading to their over exploitation (Gonzalez, 29). Pollution of the environment should be limited as it is the major cause of desertification, for example, water pollution, land pollution, which leads to food insecurity. Policies should be put in place to govern the management of natural resources. The book covers the natural resources as an economic problem. In this book, he talks about the interdependency of Saudi Arabia as the cause of it running dry. Saudi has got limited underground water to support its wheat plantation and agricultural support leading to their reliance on other states for food supply; hence, food
Thursday, February 6, 2020
Oreo Multiple National Corporation Essay Example | Topics and Well Written Essays - 1000 words
Oreo Multiple National Corporation - Essay Example Oreo Multiple National Corporation Recently, the unusual has happened whereby human emotions have been used and exploited. An example of this is the emergence of sick animals on television in order to stir up emotions and winning hearts for financial support that can treat these poor animals. Children have also been used in the commercials in order to attract attention to some of the products that are being advertised. This is evidenced by the Oreo Company which uses advertising to market their product which is the cookie. Oreo Multiple National Corporation used their staff all over the world to deploy multiple television commercials, in order to capture the different cultures and languages all over the world. The objective of this act is to ensure that the same technique is not used again or repeated in some of the regions in the world. In other words it has deployed a range of Video in different languages ââ¬â¹Ã¢â¬â¹to countries that do not speak the original languages used in advertising the cookie, and thus ensure that human nature is not exploited and the people are impacted with the necessary knowledge. This method of marketing the cookie is effective especially when the peers vision how the kids enjoy the taste of Oreo. The ways in which the product is advertised pushes the children to buy the product or even makes them persuade their parents to purchase the cookie for them instead of having any other type of biscuit.
Tuesday, January 28, 2020
The French Revolution Essay Example for Free
The French Revolution Essay The events leading to the French Revolution are quite obvious. 30 million people living in France, most living in small, rural villages while less than a million people lived in Paris. The population was growing rapidly but the economy was not. The previous king had spent too much money fighting wars and the national debt was staggering. There was an obvious rift between classes; peasants were starving while the noble class continued to live opulent lifestyles. At the beginning of the Revolution, after the storming of the Bastille, the French monarch attempted to clean up their finances and a representative government was created, complete with a Declaration of Rights. This phase was led by the Third Estate of the Estates General. A legislative assembly was formed, and war was declared on Austria and Prussia. It was at the end of this phase in 1792 when King Louis XVI was forced to flee the throne. The second phase of the Revolution is known as the National Convention. After the death of the king in the beginning of 1793,the economy did not improve. This led to riots and counter-revolutionary activities which led toââ¬Å"The Reign of Terror ââ¬Å", run by Maximilen Robespierre. A committee for public safety was created, which arrested people for committing crimes, sometimes as small as stealing food, and sent them to the guillotine. Almost 17,000 people were be-headed during this time. In 1795, after the execution of Robespierre, a new constitution was created along with a new legislature. The French were tired of fighting and suffering, so despite distrusting the new legislature, called the Directory, most were willing to accept these changes. The Revolution ended in 1799, thanks to the military direction of Napoleon Bonaparte. Napoleon Bonaparte was a French military leader who eventually became the Emperor of France. He spent the first years of the Revolution fighting on the French island of Corsica. When he came to mainland France, he continued to fight for the Republicans. His military career, along with his popularity, had many ups and downs. He led military campaigns in Italy, Egypt and other countries and often had differences with higher ranking military officials. Napoleon became Emperor of France in 1804, five years after the revolution ended, essentially reinstating a type French monarchy. Over the course of ten years, he led more battles across Europe, divorced and re-married, and had the Pope imprisoned when he attempted to ex-communicate Bonaparte. Napoleon abdicated the throne in 1814 to his son, and was sent into exile, which he later escaped and was finally defeated at Waterloo in 1815. He died in 1821 under British surveillance.
Monday, January 20, 2020
The Physics of Soccer :: physics sport sports soccer football
Rolling Motion and Friction Suppose you kick a soccer ball without giving it any spin. Your foot, therefore, gives the ball an initial speed (v) and an initial angular speed of 0. Since grass is not frictionless, the ball initially slides across the field, then starts to rotate and, eventually, starts rolling without slipping. A soccer ball rolls without slipping when its center-of-mass speed equals its angular speed (around its center of mass). OK, now suppose you want to kick the ball so that it immediately starts rolling without slipping. How? You would give the ball "topspin" by striking the ball a distance (s) above an imaginary horizontal line that passes through the ball's center. But where? ANSWER: s=0.4R. You would strike the ball a little less than half the radius of the ball above its center line. When two objects slide across one another, they exert a frictional force against each other. These forces are always tangent to the surfaces. A soccer ball and its interaction with the field is an example of this. The frictional force is opposite the direction that the ball is traveling. Physics gives us the following equation: f=mN for objects that slide against one another; where the frictional force (f) is equal to the upward "normal force" that the surface exerts on the ball (N) multiplied by the coefficient of friction (m). The coefficient of friction is not a constant, but will vary with the ball and surface type. The more friction there is between the ball and the field, the slower the ball will move after a bounce. Balls that skid, on the other hand, do not generate as much friction and subsequently do not slow down as much. So, the coefficient of friction tells us how fast (or slow) a ball will travel: The higher the coefficient, the slower the ball. A device similar to the Stimpmeterà ®, which is used to measure the "speed" of a golf green, could measure a soccer field's coefficient of friction by rolling a small ball on grass and measuring the distance it travels before stopping. Projectile Motion When projectile motion is treated in basic physics courses, the influence of air resistance is often neglected in the calculations and the trajectory of a projectile becomes a parabola where the horizontal velocity component is contant and the vertical component is subject to gravity. However, for someone watching a game of soccer, it is clear that the motion of a soccer ball is governed not only by gravity, but also by air resistance.
Sunday, January 12, 2020
Biases
Person-positivity bias is the tendency to evaluate an object more favorably the more the object resembles an individual human being. Generally, the more a comparison target resembles a specific person, the more familiar it will be. However, groups of people are considered to be more abstract concepts, which leads to less favorable judgments.With regards to the optimistic bias, when people compare themselves to an average person, whether someone of the same sex or age, the target continues to e viewed as less human and less personified, which will result in less favorable comparisons between the self and others. false-consensus effect or false-consensus bias is a cognitive bias whereby a person tends to overestimate how many people agree with him or her.There is a tendency for people to assume that their own opinions, beliefs, preferences, values and habits are ââ¬Ënormal' and that others also think the same way that they do. [l] This cognitive bias tends to lead to the perception of a consensus that does not exist, a ââ¬Ëfalse consensus'. This false consensus is significant because it increases self-esteem. The need to be ââ¬Å"normalâ⬠and fit in with other people is underlined by a desire to conform and be liked by others in a social environment.Counterfactual thinking is a term of psychology that describes the tendency people have to imagine alternatives to reality. Humansare predisposed to think about how things could have turned out differently if onlyâ⬠¦ , and also to imagine what if?. Counterfactuals are conditional propositions, containing an antecedent and a consequence (e. g. , If Matt had run, he would have caught the bus. )
Saturday, January 4, 2020
Analysis of Dantes Inferno Essay - 748 Words
In Danteââ¬â¢s Inferno, Dante is taken on a journey through hell. On this journey, Dane sees the many different forms of sins, and each with its own unique contrapasso, or counter-suffering. Each of these punishments reflects the sin of a person, usually offering some ironic way of suffering as a sort of revenge for breaking Godââ¬â¢s law. As Dante wrote this work and developed the contrapassos, he allows himself to play God, deciding who is in hell and why they are there. He uses this opportunity to strike at his foes, placing them in the bowels of hell, saying that they have nothing to look forward to but the agony of suffering and the separation from God. Each contrapasso is well thought out and devised to try to show that each sin isâ⬠¦show more contentâ⬠¦So through his work, Dante has forever tarnished the names of his enemies, which is why crossing any author or poet is unwise. Dante however proves himself to be a hypocrite and often reflects his own sins and hubr is in his work. His guide throughout hell, and later purgatory, is none other than Virgil, one of historyââ¬â¢s finest and most accomplished epic poets. In the very first circle of hell, Limbo, he places himself among the other great epic poets: ââ¬Å"He is Homer, sovereign poet, next comes Horace the satirist, Ovid is third, the last is Lucan. ââ¬ËSince each is joined to me in the name the one voice uttered, they do me honor and doing so, do well.ââ¬â¢ There I saw assembled the fair school of the lord of loftiest song, soaring like an eagle far above the rest. After they conversed a while, they turned to me with signs of greeting, and my master smiled at this. And then they showed me greater honor still, for they made me one of their company, so I became the sixth amidst such wisdom.â⬠-Divine Comedy, Danteââ¬â¢s Inferno, Canto IV, lines 88-102. 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