Why Batteries Discharge More Quickly in Cold Weather

If you live in a place that gets a cold winter, you know to keep jumper cables in your car because theres a good chance you or someone you know will have a dead battery. If you use your phone or camera in really cold weather, its battery life drops, too. Why do batteries discharge more quickly in cold weather? Key Takeaways: Why Batteries Lose Charge When It's Cold How long batteries hold their charge and how quickly they discharge when used depends on battery design and temperature.Cool batteries hold a charge longer than warm batteries. Cold batteries discharge faster than hot batteries.Most batteries can be damaged by excessive temperature and may ignite or explode if its too hot.Refrigerating charged batteries may help them hold their charge, but its best to use the batteries near room temperature to ensure they last as long as possible. The Effect of Temperature on Batteries The electric current generated by a battery is produced when a connection is made between its positive and negative terminals. When the terminals are connected, a chemical reaction is initiated that generates electrons to supply the current of the battery. Lowering the ambient temperature causes chemical reactions to proceed more slowly, so a battery used at a low temperature produces less current than at a higher temperature. As cold batteries run down they quickly reach the point where they cannot deliver enough current to keep up with the demand. If the battery is warmed up again it will operate normally. One solution to this problem is to make certain batteries are warm just prior to use. Preheating batteries is not unusual for certain situations. Automotive batteries are protected somewhat if a vehicle is in a garage, although trickle chargers (aka battery maintainers) may be needed if the temperature is very low. If the battery is already warm and insulated, it may make sense to use the batterys own power to operate a heating coil. Keep smaller batteries in a pocket. It is reasonable to have batteries warm for use, but the discharge curve for most batteries is more dependent on battery design and chemistry than on temperature. This means that if the current drawn by the equipment is low in relation to the power rating of the cell, then the effect of temperature may be negligible. On the other hand, when a battery is not in use, it will slowly lose its charge as a result of leakage between the terminals. This chemical reaction is also temperature-dependent, so unused batteries will lose their charge more slowly at cooler temperatures than at warmer temperatures. For example, certain rechargeable batteries may go flat in approximately two weeks at normal room temperature but may last more than twice as long if refrigerated. Bottom Line on the Effect of Temperature on Batteries Cold batteries hold their charge longer than room temperature batteries; hot batteries dont hold a charge as well as room temperature or cold batteries. Its good practice to store unused batteries in a cool location.Cold batteries discharge faster than warmer batteries, so if youre using a cold battery, keep a warm one in reserve. If batteries are small, keeping them in a jacket pocket is usually good enough.Some types of batteries are adversely affected by high temperatures. A runaway effect can occur, potentially leading to a fire or explosion. This is commonly seen in lithium batteries, such as you might find in a laptop or cell phone.

Childhood Obesity The Overbearing Truth - 1664 Words

Jayden Sadettan Schlesinger English 131 November 22nd 2015 Childhood Obesity; the Overbearing Truth. â€Å"Childhood obesity is best tackled at home through improved parental involvement, increased physical exercise, better diet and restraint from eating† – Bob Filner Imagine growing up in a household where one can eat anything. Whether an unlimited amount of sweets or entrees. This is happening now. Parents are unaware of their children eating and physical habits. Leading to the whopping amount of $190 billion in medical bills. This is all because of obesity related problems in The United States (Phit). One out of three children are considered overweight or obese between the ages of 2-19 (Gavin). Childhood obesity is ruthless. It leads to an†¦show more content†¦Parents need to be ambitious for their kids. Parents need to be consumed in helping their kids in order for them to live a healthy lifestyle. By realizing they are the ones distributing the nutrients to their children. They will have a self-realization that the kids aren’t the ones making the bad decisions. Parents will then realize that they are the ones who are in charge of their child’s urgency for a healthier lifestyle. They will realize the media influences an d the increased of childhood obesity over the past 25 years. All across the world, society is infused with media. Everything is about it. Movies, news celebrities, and the worst one. Advertisements. These ads cause the human to long for the need to obtain a certain product. The greatest victim is the children. Watching television everyday can make the children ache for the need to own the new toy or something, junk food. Junk food is advertised as good food or â€Å"hip† food. Kids become persuaded with the images and videos into thinking that they must want it, thus asking their parents. A study done by Dr. Strasburger figured out that screen time that advertises junk food and fast food increases children s requests for those particular foods and products. Such as; snacking increases while watching TV or movies, and late-night screen time interferes with getting adequate amounts of sleep, which is a known risk factor for obesity (Strasburger). This includes the studies that were conducted by the nations

Computer Drawing Free Essays

Chapter 1 1. Explain the difference between engineers and technologists. Engineers are problem solvers. We will write a custom essay sample on Computer Drawing or any similar topic only for you Order Now They are creative to use technical means to solve problems. They design products, systems, devices, and structures to improve our living conditions. They work with engineers and are concerned with the practical aspects of engineering in planning and production. 2. How can visualizing help an engineer in the design process? Visualization can help an engineer to mentally picture things that do not exist. Besides, engineers with good visualization ability are able to picture things in their minds. Furthermore, good visualization skills allow them to control mental image, allowing them to move around the image, change the form, look inside, and picture the inside of the mental image of the design problem. 3. What are the three main areas or phases of the model-centered design process? Do the activities in these areas happen in a sequential fashion? The three main areas of phases of the model-centered design process are ideation, refinement, and implementation. Windows 7 Check Your Understanding iframe class="wp-embedded-content" sandbox="allow-scripts" security="restricted" style="position: absolute; clip: rect(1px, 1px, 1px, 1px);" src="https://phdessay.com/windows-7-check-your-understanding/embed/#?secret=5NF5NpjJNR" data-secret="5NF5NpjJNR" width="500" height="282" title="#8220;Windows 7 Check Your Understanding#8221; #8212; Free Essays - PhDessay.com" frameborder="0" marginwidth="0" marginheight="0" scrolling="no"/iframe Model-centered engineering design is a nonlinear team approach to design that brings together the input, processes, and output elements necessary to produce a product. 4. Explain how PLM is used in the design process. What is its relationship to CIC? Product Life Cycle Management (PLM) is an organizational model that involves all the company’s department, including the engineering design process, in the design and manufacture of a product. In addition to CAD software, specialized software products and technologies are used in conjunction. PLM is used as a basis for creating the accumulated corporate intellectual capital (CIC) of a company or organization. 5. Outline the steps of problem identification in the ideation phase. Problem identification is an ideation process which consisting six elements: Problem statement, Research, Data gathering, Objectives, Limitations, and Scheduling. 6. What kinds of graphics are used in the ideation phase? The types of graphics used in ideation phase include charts, graphs, ideation sketches and drawings, design drawings, analysis and concept models, and presentation graphics. 7. What is the designer’s notebook? How is it used? A designer’s notebook is similar to a diary and contains many notes and sketches that are organized to show the path of development for a product and process. A well documented notebook contains notes, calculations, signatures, and dates. Keeping good note can make an accurate document for an original design. 8. Outline the main activities in the refinement phase. Refinement is a repetitive (iterative or cyclical) process used to test a preliminary design. Refinement consists of three main areas: modeling, design analysis, and design visualization. . Describe the different kinds of models used in the design process. Modeling is the process of representing abstract ideas, words, and forms, through the orderly use of simplified text and images. Models are classified as either descriptive or predictive. Descriptive model presents abstract ideas, products, or processes in a recognize form. Descriptive models consisting 3-D CA D or physical scale models used simply to visually represent the design. Predictive models can be mathematical or virtual 3-D CAD models that can be used to analyze the motion or physical properties of the design. 0. Describe the different kinds of analysis techniques used in the design process. Types of analysis techniques used in the design process are Property analysis, Mechanism analysis, Functional analysis, Human factors analysis, Aesthetic analysis, Market analysis, and Financial analysis. 11. Outline the three ways the 3-D model database can be used in the implementation phase. Three ways the 3-D model database can be used in the implementation phase are production, marketing and service documentation. Production is 3-D CAD models which are used to run machine tools and make parts and layout the factory floor. Marketing is 3-D CAD models are used for illustrations, presentation graphics, and advertising. Service Documentation is 3-D CAD models are used for service manuals, training, and assembly instructions. 12. What kinds of documentation might be produced as part of the design process? Design process documentation 2-D engineering drawings, 3-D design models, presentation drawings and illustrations. 13. Explain the role of PDM in the design process. What is the relationship of ERP to PDM? Product Data Management (PDM) is the name given to specific computer-based tools and used to track CAD or office documents with user-defined data fields, such as revisions, authors, date, and so forth in the development and manufacture of a product. Within PDM, Enterprise resource planning (ERP) is a system that specifically focuses on the ordering of material and planning for the materials used for manufacture of a product. 14. What is the difference between conventions and standards? Conventions commonly are accepted practices, rules, or methods. In technical drawing, an example of a convention is the use of dashed lines or hidden features, on a multiview drawing to designate a feature hidden from the current viewpoint. Standards are sets of rules (formal; ANSI or ISO) that govern how technical drawings are represented. 15. Describe two reverse engineering techniques. One of the reverse engineering techniques are the using of coordinate measuring machine (CMM) that can measure objects accurately and then inputs the 3-D data into a CAD system and modified it. Another one is called scanning by using laser or specialized photographic equipment to make critical measurement from existing parts. 16. Describe two different rapid prototyping technologies. One of the rapid prototyping technologies are Stereolithography (SLA) which using a laser focused beam to harden a light-sensitive polymer. Another one is Fused Deposition Modeling (FDM) which using a molten plastic to deposit a series of very thin layers to build and create a part. 17. Explain why an enterprise might want to store data in an off-site data warehouse. Then reason of an enterprise want to store data in an off-site data warehouse is protect against fire or other castasthophies at the companies engineering center. 18. Describe two different VR display techniques. Two different VR display are the using of head-mounted display (HMD) that only for individual users and multiple projection systems called computer augementedd virtual environments (CAVEs) for multiple users in a larger physical space. How to cite Computer Drawing, Papers Computer Drawing Free Essays Chapter 1 1. Explain the difference between engineers and technologists. Engineers are problem solvers. We will write a custom essay sample on Computer Drawing or any similar topic only for you Order Now They are creative to use technical means to solve problems. They design products, systems, devices, and structures to improve our living conditions. They work with engineers and are concerned with the practical aspects of engineering in planning and production. 2. How can visualizing help an engineer in the design process? Visualization can help an engineer to mentally picture things that do not exist. Besides, engineers with good visualization ability are able to picture things in their minds. Furthermore, good visualization skills allow them to control mental image, allowing them to move around the image, change the form, look inside, and picture the inside of the mental image of the design problem. 3. What are the three main areas or phases of the model-centered design process? Do the activities in these areas happen in a sequential fashion? The three main areas of phases of the model-centered design process are ideation, refinement, and implementation. Model-centered engineering design is a nonlinear team approach to design that brings together the input, processes, and output elements necessary to produce a product. 4. Explain how PLM is used in the design process. What is its relationship to CIC? Product Life Cycle Management (PLM) is an organizational model that involves all the company’s department, including the engineering design process, in the design and manufacture of a product. In addition to CAD software, specialized software products and technologies are used in conjunction. PLM is used as a basis for creating the accumulated corporate intellectual capital (CIC) of a company or organization. 5. Outline the steps of problem identification in the ideation phase. Problem identification is an ideation process which consisting six elements: Problem statement, Research, Data gathering, Objectives, Limitations, and Scheduling. 6. What kinds of graphics are used in the ideation phase? The types of graphics used in ideation phase include charts, graphs, ideation sketches and drawings, design drawings, analysis and concept models, and presentation graphics. 7. What is the designer’s notebook? How is it used? A designer’s notebook is similar to a diary and contains many notes and sketches that are organized to show the path of development for a product and process. A well documented notebook contains notes, calculations, signatures, and dates. Keeping good note can make an accurate document for an original design. 8. Outline the main activities in the refinement phase. Refinement is a repetitive (iterative or cyclical) process used to test a preliminary design. Refinement consists of three main areas: modeling, design analysis, and design visualization. . Describe the different kinds of models used in the design process. Modeling is the process of representing abstract ideas, words, and forms, through the orderly use of simplified text and images. Models are classified as either descriptive or predictive. Descriptive model presents abstract ideas, products, or processes in a recognize form. Descriptive models consisting 3-D CA D or physical scale models used simply to visually represent the design. Predictive models can be mathematical or virtual 3-D CAD models that can be used to analyze the motion or physical properties of the design. 0. Describe the different kinds of analysis techniques used in the design process. Types of analysis techniques used in the design process are Property analysis, Mechanism analysis, Functional analysis, Human factors analysis, Aesthetic analysis, Market analysis, and Financial analysis. 11. Outline the three ways the 3-D model database can be used in the implementation phase. Three ways the 3-D model database can be used in the implementation phase are production, marketing and service documentation. Production is 3-D CAD models which are used to run machine tools and make parts and layout the factory floor. Marketing is 3-D CAD models are used for illustrations, presentation graphics, and advertising. Service Documentation is 3-D CAD models are used for service manuals, training, and assembly instructions. 12. What kinds of documentation might be produced as part of the design process? Design process documentation 2-D engineering drawings, 3-D design models, presentation drawings and illustrations. 13. Explain the role of PDM in the design process. What is the relationship of ERP to PDM? Product Data Management (PDM) is the name given to specific computer-based tools and used to track CAD or office documents with user-defined data fields, such as revisions, authors, date, and so forth in the development and manufacture of a product. Within PDM, Enterprise resource planning (ERP) is a system that specifically focuses on the ordering of material and planning for the materials used for manufacture of a product. 14. What is the difference between conventions and standards? Conventions commonly are accepted practices, rules, or methods. In technical drawing, an example of a convention is the use of dashed lines or hidden features, on a multiview drawing to designate a feature hidden from the current viewpoint. Standards are sets of rules (formal; ANSI or ISO) that govern how technical drawings are represented. 15. Describe two reverse engineering techniques. One of the reverse engineering techniques are the using of coordinate measuring machine (CMM) that can measure objects accurately and then inputs the 3-D data into a CAD system and modified it. Another one is called scanning by using laser or specialized photographic equipment to make critical measurement from existing parts. 16. Describe two different rapid prototyping technologies. One of the rapid prototyping technologies are Stereolithography (SLA) which using a laser focused beam to harden a light-sensitive polymer. Another one is Fused Deposition Modeling (FDM) which using a molten plastic to deposit a series of very thin layers to build and create a part. 17. Explain why an enterprise might want to store data in an off-site data warehouse. Then reason of an enterprise want to store data in an off-site data warehouse is protect against fire or other castasthophies at the companies engineering center. 18. Describe two different VR display techniques. Two different VR display are the using of head-mounted display (HMD) that only for individual users and multiple projection systems called computer augementedd virtual environments (CAVEs) for multiple users in a larger physical space. How to cite Computer Drawing, Essay examples

Business Law for Key Performance Indicator- myassignmenthelp.com

Question: Discuss about theBusiness Law for Key Performance Indicator. Answer: As provided in the given case study it can be stated that the hotel owners have decided to renovate and extend the bistro. By virtue of being the purchasing manager of the hotel, I have been granted the authority to negotiate contracts with the suppliers to the value of $150,000 dollars. Therefore in the event of negotiating contracts with the suppliers which are more that 150,000 dollars in value, it is essential to get the approval of the directors, managers and the owners of the company. It is essential to maintain good relations with suppliers as suppliers not only provide goods and services, they are instrumental in running the business. Inspecting whether the suppliers are given payments timely is essential to maintain good relations with the suppliers. Pay records of the suppliers an be reviewed. Monitoring the financial position of the suppliers can also be helpful for maintaining a good relationship with the suppliers. Proper records of the defective goods supplied by the suppliers must be kept and inspected so as to address such issues with the suppliers. In this contract the important contract terms are that the contract would complete the construction work in time and that the contractor would paid the amount that is mentioned in the contract upon the completion of the construction work. Thus to ensure that all the contract terms are complied with, it is essential to ensure that the contractor would be paid in time and the specified amount as mentioned in the contract. However, in case of delay penalty would be imposed upon the contractor and contract can even be rescinded. KPI can be defined as the key performance indicator. It is the measurable value that shows how effectively a company is achieving its objectives. High level of KPI may focus on the overall achievement of the organization. Targeting the number of the complaints received by the suppliers can help the business to check how it addresses such complainants and how effective is the dispute resolution process of the business. The terms of the contract must be discussed with the relevant stakeholders which include the suppliers and the managers and the owners of the hotel. A copy of the contract must be provided to the relevant stakeholders so that they can examine and evaluate the document. After inspection of the contractual document, it might be signed by the contractor and the supplier, however in case any term of the contract is found to be ambiguous, such contract can be revised and sent again for approval. It can be stated that the terms of the contract are legally binding upon the parties. However the terms of the contract can be amended if it is sought by both the parties to the contract. Such amendment to the contract must be done within the life cycle of the contract. Thus in case of any dispute regarding the payment method, the contract can be amended. For amending the contract, it is important to notify all the parties to the contract about the change in the contract terms which in this given case study include the owners, directors and the suppliers. Good relations can be maintained with the suppliers by communicating with them freely. Paying the suppliers on time and address any issue faced by them can also help contractors to build good relations with the suppliers.