CBSE PMT (Pre Medical Test) is an entrance exam of the national level. It is popularly known as the AIPMT (All India Pre Medical Test). It is conducted by CBSE (Central Board of Secondary Education) every year to fill 15% of the total seats for medical/dental bachelor degree courses in medical colleges run by Union of India‚ state government‚ municipal and other local authorities in India except the state of Jammu & Kashmir. According to the revised scheme‚ the AIPMT examination is conducted in two
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Given: Ls = 2 mm = 0.002 m Lc = 3 mm = 0.003 m ks = 17 W/m-K kc = 372 W/m-K Q.3 A 4 mm diameter spherical ball at 50oC is covered by a 1 mm thick plastic insulation (k = 0.13 W/m-K). The ball is exposed to a medium at 15oC‚ with a combined convection and radiation heat transfer coefficient of 20 W/m2-K. Determine if the plastic insulation on the ball will help or hurt heat transfer from the ball. Q.4 Prove that if k varies linearly with T in a slab‚ and if heat transfer is one-dimensional and steady
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Analysis: 1. Explain why blood pressure and heart rate differ when measured in a reclining position and in a standing position. When a person stands‚ the heart must pump blood against the pull of gravity to reach important areas such as your brain. Veins must work hard to get blood back to your heart. As a person reclines‚ the heart does not have to pump as hard to reach the same areas‚ decreasing the blood pressure. Also‚ a person is usually more relaxed in a reclining position‚ which
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land and ocean 51%‚ reflected by atmosphere 6%‚ reflected by clouds 20%‚ reflected from earth’s surface 4%‚ absorbed by atmosphere 1.6%‚ absorbed by clouds 3%‚ conduction and rising air 7% • (RED) Carried to clouds and atmosphere by latest heat in water vapor 23%‚ radiation absorbed by atmosphere 15%‚ radiated directly to space from earth6%‚ radiated to space from clouds and atmosphere 64%. SEE ARROW POSITION ON PPOINT • Considering
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containing the vital organs. Students will be told a few common causes of Hypothermia which are Environmental conditions‚ water immersion and trauma. Students will be informed of the five different ways the body loses heat which are radiation‚ conduction‚ convection‚ evaporation and respiration. Some signs of Hypothermia are an increase in respirations and pulse in early stages‚ and
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-425.93 -92.30 -407.27 -285.83 Hess’s Law: ΔH(rxn) = Sum[ΔH(f) products] - Sum[ΔH(f) reactants] ΔH(rxn) = [(1 mol)(-407.27 kJ/mol) + (1 mol)(-285.83 kJ/mol)] - [(1 mol)(-425.93 kJ/mol) + (1 mol)(-92.30)] = - 359.47 kj/molWhy are there energy changes when a chemical reaction takes place? Do physical state changes involve energy changes? Exothermic energy changes and endothermic energy changes in chemical reactions are described‚ and exothermic reactions and endothermic reactions are discussed
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6th Grade Science Vocabulary List 1. Qualitative Observation- To study by using the 5 senses- things you see‚ hear‚ feel‚ smell‚ and taste. 2. Quantitative Observation- to study and look for numbers-measurements‚ values‚ and quantities. 3. Dependent Variable- the variable a scientist observes or measures during an experiment. 4. Independent Variable- The factor that is changed by the investigator to observe how it affects the dependent variable.
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Body heat can be lost by four mechanisms. 1. Convection is the loss of heat from the body by air blowing over the skin or through clothing. 2. Conduction‚ or direct contact with a colder object. For example‚ lying in snow but with the exception of being immersed in cold water; Heat is then lost 25 to 30 times faster. 3. Evaporation‚ or conversion of liquid on the skin to vapor. This accounts to 20% of heat loss through sweating and respiration. 4. Radiation is the primary method of heat loss‚ accounting
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Science: P1a 1.1 How can science help us see in the dark? AQA Specification Link • Thermal (infra-red) radiation is the transfer of energy by electromagnetic waves. • All bodies emit and absorb thermal radiation. • The hotter a body is the more energy it radiates. Learning Objectives Students should learn: • The nature of thermal radiation. • That the amount of thermal radiation emitted increases with the temperature of the object. Teaching / Learning activities (including How Science
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PASSIVE SOLAR INTRODUCTION Passive solar is a “GREEN BUILDING “technique‚ which depends on natural convection process rather than mechanical transmitting source‚ which captures the heat energy of sun and delivers it during winter and pumps out the heat in summer‚ using heat distribution methods. Some of the heat distribution methods are Convection‚ Conduction‚ and Radiation. However components of passive solar heating are‚ the aperture area of the house‚ absorber area of the house‚ thermal mass of
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