2) A 0.400 kg aluminum kettle contains 2.00 kg of water at 15.0 oC. How much heat is required to raise the temperature of the water (and kettle) to 100 C? 3) You go to kitchen to boil water. You pour 280 gram of water to a container‚ and put the container on a 293 W electric heater. Assume that all the heat from the heater is used to heat the water. a) If the temperature of the water is 21.6 °C before you turn on the heater‚ how long does it take for the water temperature to reach 100
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Operating rooms are creating a disproportionate amount of waste for the space they occupy in a hospital‚ accounting for 20-30% of all hospital waste (Kagoma et al. 1905 ). Imagine a bustling operating room: a patient is being operated on and there are surgical instruments laid out on a blue tarp-covered table. The surgeon asks a nurse for gauze and the ripping open of the package is heard‚ which is then thrown in the trash. Supply after supply is unveiled in their sterilized package‚ and one by one
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Mass Mass refers to the quantity of matter in an object. The SI unit of mass is the kilogram (kg). The mass of an object is a fundamental property of the object; a numerical measure of its inertia; a fundamental measure of the amount of matter in the object. Definitions of mass often seem circular because it is such a fundamental quantity that it is hard to define in terms of something else. All mechanical quantities can be defined in terms of mass‚ length‚ and time. The usual symbol for mass
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Source 1 Hotbox Food would like to present a line of delicious beverages in completely self heating cans. Thanks to these innovative containers called “Hotshots”‚ it is now possible to drink high quality beverages at any time and at any place. Neither an external heat source‚ nor any other cooking utensils are required. Drinks 2go recipes do not contain additives‚ preservatives‚ artificial colorings or any raw materials obtained from GMO (Genetically Modified Organisms). Source 2 In one version
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DIFFUSION AND OSMOSIS Chapter 3 of your textbook explains diffusion and osmosis. Diffusion is simply the net movement of atoms or molecules from a region of higher concentration to a region of lower concentration. The force behind the movement is heat or kinetic energy (also called Brownian motion). Diffusion occurs when you spill water on the carpet floor and it spreads out‚ or when you open a bottle of perfume and it leaves the bottle and spreads throughout the air in the room. Osmosis is a
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questions were answered by our lab experiment. We took three different groups of millipedes and divided them by an external stimuli and looked for a response. The stimuli were a large wolf spider and a gentle probe. We placed the millipedes in separate containers and looked for any signs of defense. The results were a little shocking. The millipedes ignored the stimuli as if they did not feel a threat. Interestingly enough‚ this is because millipedes have very few natural predators‚ so they have little instinctive
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\s Household chemicals such as Windex‚ a glass cleaner‚ are known to be harmful to humans but if they affect plant growth could be an interesting experiment. Our experiment consisted of different levels of Windex mixed with water and given to Brassica Rapa plants in order to grow. Are results showed that Windex barely had an effect on the plant growth and the plants showed steady increase in growth. In conclusion‚ our experiment did not assure that Windex add a boost in plant growth but we
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Upper Hutt College Year 13 Biology Slater Study Achievement standard: biology 3.1 Introduction to experiment: In this investigation of the ecological niche of the woodlouse‚ I chose to experiment the amount of soil moisture that the slaters tend to prefer. I chose this aspect‚ as moisture is a vital part in the survival of this small creature. Internet sources provided information of the woodlice that shows that they are from crustacean descent and formerly aquatic even though
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When most people talk about ancient Greek civilization‚ they usually think about the humanities (philosophy and literature) that flourished in ancient Greece. They know Plato and his theories about the ideal forms‚ they admire the depth of Aristotle ’s thought. However‚ few people heard about the contribution of the Ancient Greeks in other sciences like medicine‚ which was made by Hippocrates‚ or mathematics and geometry by Pythagoras‚ Euclid and Archimedes and fewer know about technological achievements
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materials. Fewer trucks mean less fuel usage and therefore less air pollution from truck exhaust. Recycling plastic containers helps to conserve landfill space and natural resources and to cut down on pollution. Since the number of landfills continues to diminish‚ keeping plastic containers out of landfills is important. Plastics do not degrade in landfills. Therefore‚ containers you throw away will be taking up landfill space hundreds of years from now. Making plastic products from recycled
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