the heat transfer occur: from hot water to cold‚ or from cold water to hot? Answer: The heat transferred from hot water to cold water is due to their potential (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
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has the ability to monitor and control various facilities within the building so as to offer its users or occupants with effective security‚ improved productivity‚ human comfort‚ and efficient energy management. The main IBAS subsystems include Heat‚ Ventilation and Air Conditioning (HVAC)‚ Lighting Systems‚ Life and Safety System‚ and Access Control. This thesis focuses on the design implementation and development of HVAC and lighting controllers. Currently‚ most HVAC systems are controlled
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riding ring and transmission mechanism.This drying machine is specialized developed for frying semi-hydrated gypsum powder and architectural gypsum podwer on the base of the technology of rotary dryer and food wok machine.According to different heat transfers‚ gypsum processing can be divided into two kinds of direct method and indirect method:1‚ indirect method(two steps of drying and calcined)According to the power plant"s energy condition and environmental requirements‚ two steps of drying and calcined
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remains constant at the freezing point while the water crystallizes. Once the water is completely frozen‚ its temperature continues to fall. The solid substance (ice) acquires more fixed particles than the water; the ice will need a large amount of heat to change its phase or to liquid than the water. So the ice can truly support the soft drink to cool. 2. Why do some cooks put long aluminum nails through potatoes to be baked? I like the taste of potatoes better when they are baked in
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components solar radiation‚ daylight and heat radiation has to be taken into account (among other factors such as humidity‚ air speed and occupant activity and clothing levels). In hot climates the optimization of room comfort is a challenging task due to the high solar radiation over the whole year. In intelligent buildings new material developments are applied optimizing the building envelope in an integral building design process. New solutions for weather‚ noise and heat protection are developed‚ where
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6. Applications * Is it possible to add heat to a body without changing its temperature? Yes. It is possible to add energy to a body (in the form of heat) and not raise its temperature by causing a phase change. When you heat ice it takes energy to convert it from ice to water‚ but does not change the temperature of the body until it is all converted. The principle behind this is what we call latent heat. It refers to the energy (or heat) required to change the state of a substance without changing
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Hand warmers are small pouches that heat up when they come in contact with air‚ typically used to keep hands warm in cold temperatures. The contents inside the hand warmers‚ mainly the iron powder and activated charcoal‚ and oxygen in the atmosphere‚ react with each other chemically to create warmth. Inside the pouch‚ there is iron powder. When it comes in contact with oxygen‚ the iron rusts and releases heat. The outside bag is a microporous pouch‚ which has tiny holes that are big enough to allow
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HEAT 4.1 UNDERSTANDING THERMAL EQUILIBRIUM 1. Define: The measure of the degree of hotness of an object. (a) Temperature Measured in SI unit Kelvin‚ K A hot object is at a higher temperature than a cold object. Form of energy‚ measured in Joules‚ J (b) Heat Heat is transferred from hotter object (higher temperature) to colder object (lower temperature) When an object is heated‚ it will absorb heat energy and the temperature will increase. When an object is cooled‚ it will release heat energy and
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precipitation. When water vapor condenses in the formation of clouds‚ large amounts of heat - calledlatent heatis released into the atmosphere. Latent heat is an important source of energy in the development of thunderstorms and hurricanes. Water vapor strongly absorbs HYPERLINK http//www.atmo.arizona.edu/courses/fall14/atmo336s2/lectures/glossary.html l infrared infrared radiation‚ making it an important gas in the Earths heat-energy balance. In fact water vapor is the largest contributor to the greenhouse
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Thermal Energy Heat is thermal energy being transferred from one place to another‚ because of temperature changes. This can take place by three processes. These three processes are known as conduction‚ convection‚ and radiation. When we place two objects with different temperatures in contact with each other‚ the heat from the hotter object will immediately and automatically flow to the colder object. This is known as conduction. Some objects make excellent conductors of heat while others make
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