Insulator

and unexpected. Many scientists engaged in debate about the a possible explanation behind the above-mentioned phenomenon. While many of the scientists attributed this phenomenon to a theory termed “action at a distance” which presumes that since insulators block electric current, the only reason why a charge is found on the outer surface is that electricity can work at a distance, the way gravity does. They explained that when electricity was accumulating on the inner surface, an electricity of…

1. Introduction 1.1 History The lunchboxes which were available earlier were not useful for kids. In 1800s, workers carry metal buckets to store food while going to workplace. In fact, your lunch pail illustrated your place on the economic scale -- a lunch pail meant you couldn't afford a hot noontime meal. This didn't stop children from wanting to emulate their working parents, however Later, kids fashioned their own lunch buckets from tin boxes that were originally used to hold cookies or…

docking, the space shuttle. For which the astronauts use to get back-and-from the ISS. The shuttle being used and reused, Most of the tiles on the shuttle are made of silica fibers, which are produced from high grade sand. Silica is an excellent insulator because it transports heat slowly. When the outer part of a tile gets hot, the heat takes a long time to work its way down through the rest of the tile to the shuttle's thinner layer. This tile contains a special chemical element Aluminum.…

Task 1 Homeostasis is the ability of the body to maintain a constant internal environment within narrow limits. The word homeo means it is unchanging and stasis means it is staying still; it has three main elements that are a sense organ to detect change, a control centre that is usually from the brain or spinal cord and a responding organ to effect a change in conditions. The factors that homeostasis controls in our body are our body temperatures, water content, carbon dioxide levels and our…

What is meant by the specific heat capacity of a substance? It is the amount of energy required to increase the temperature of one gram of a body by one Kelvin unit, expressed as J/K/g. The specific heat capacity also can be measured in J/K/Kg and J/K/mol. Substance Specific heat Capacity (J/K/g) Water 4.18 acetone 2.17 hexane 2.26 Compare the specific heat capacity of water with a range of other solvents. The table compares the heat capacities of water and two other solvents. Compare the…

Fjällräven, a subsidy of Fenix Outdoor, is Swedish company specializing in outdoor equipment-clothing, tents, sleeping bags and so on. Ever since Fjällräven was founded just over 50 years ago, we have had one strong driving force: to develop products that make it easier for people to enjoy the countryside (About Fjällräven - Fjällräven, n.d.). The Kånken Backpack, the Greenland Jacket, Vidda Trousers and the Expedition Down Jacket are some of its classics. THE PRODUCT: GREENLAND NO.1 DOWN JACKET…

A Battery (Electricity) is a device that makes electric current through motion of cells which are the components of the battery. They are devices that convert their inner chemical energy into electrical energy. A battery has of two or more cells which are connected together in order to give out electricity. Batteries are commonly used in single cells such as the ones used to power radios, watches and small electrical appliances that are used in everyday life. They are also used to supply energy…

Who invented the wetsuit? But this was not always so. The first sketches that were found on something like a neoprene date from the time of Leonardo da Vinci. Much later, Hugh Bradner worker US Navy discovered a material that could be very good insulator, but spend the time and that idea stood there, as reflected in letters in 1951. There are two main hypotheses about who was the creator of the first wetsuit for surfing. The first candidate is Jack O'Neill (founding father of surf brand…

1. The hypothalamus is the processing centre that controls the body temperature in the brain, through temperature receptors the skin is able to realize changes to external temperatures which send the information to the brain (hypothalamus). There are also temperature receptors that identify the temperature changes in the blood. The Processing centre triggers for the effectors (these are the sweat glands and muscles) to adapt in order the make sure our body temperature stays at 37°C. If we…

There are many types of skin cancer but the three main types of skin cancer which are basal cell carcinoma, squamous cell carcinoma and melanoma. Even though there are three major types of skin cancer this essay will be focusing on Melanoma. Before I can discuss how Melanoma works we have to understand the anatomy of the Skin tissue. In the human body our skin is the protection between the external environment and internal organs. The human body skin can be different in the thickness of the…