1 Model Question Paper Basic Engineering and Sciences The material in which spontaneous polarization changes with temperature is known as (1) Piezo electric (2) Ferro electric (3) Pyro electric (4) Magneto optic Where K and s are thermal and electrical conductivities in a solid‚ according to Wiedemann Franz law 1. The theorem used for equilibrium of concurrent 8. coplanar forces is (1) Varignon’s Theorem (2) Lame’s Theorem (3) Parallel Axis Theorem
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receive the same intensity of insolation. 8) The difference in the temperature curves for the two cities is because Los Angeles is near the coast‚ so the temperatures stay generally high while Phoenix temperatures vary. 9) The lack of atmospheric moister in California’s Mohave Desert can cause a large daily temperature range because when the air is dry‚ it cools more easily. CONCLUSION: 1) The difference in the annual temperature range between a coastal region and an inland region
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Experiment-5 Thermal physics is the combined study of thermodynamics‚ statistical mechanics‚ and kinetic theory. This practical is done to measure the temperature drop of water over a period of time (30 minutes). Research question- What is the rate of temperature change over a period of 30 minutes? Independent variable- time Dependent variable- the temperature of water Controlled variables- the amount of water in the calorimeter - The stop watch
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All chemical reactions are processed through energy exchanges. Chemical reactions either absorb energy or release energy into their surroundings. In thermodynamics‚ endothermic reactions absorb energy where exothermic reactions release energy. In this experiment‚ we will be observing the chemical reactions that occur when a specific liquid is combined with a specific solid. We will measure the temperature of the liquid before the solid is added. Then we will measure the temperature of the liquid
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speak at your funeral. You want the physicist to talk to your grieving family about the conservation of energy‚ so they will understand that your energy has not died. You want the physicist to remind your sobbing mother about the first law of thermodynamics; that no energy gets created in the universe‚ and none is destroyed. You want your mother to know that all your energy‚ every vibration‚ every Btu of heat‚ every wave of every particle that was her beloved child remains with her in this world
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physics; You can see the examples given below 1)television uses electromagnets to direct electrons on a screen to produce pictures. 2)A cell phone uses microwaves. 3)Your car is built on mechanical principles. 4)A refrigerator uses thermodynamic principles. 5)Most modern homes use electricity to power appliances. Physics is also a necessity in solving our future problems. The examples cited above show that forward-looking developments are based on the insights of physics. This applies
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the transition from the solid phase to the gas phase without passing through an intermediate liquid phase. Decomposition (Exothermic) chemical reaction where one reactant yields two or more products. Phase Diagrams a chart showing the thermodynamic conditions of a substance at different pressures and temperatures. Triple point- temperature and pressure at which the solid‚ liquid‚ and vapor
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RESULTS AND CALCULATIONS: Plot graphs of temperature (y-axis) against absolute pressure (x-axis) for a) Pressure increasing b) Pressure decreasing c) Steam table values for the range of pressure used Absolute pressure = Atmospheric pressure + Gauge pressure Atmospheric pressure = 1 bar |PRESSURE (bar) |TEMPERATURE oC | |Increasing |Decreasing |Steam Table
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often from combustion of a fuel‚ into rotational energy. Most thermal power plants produce steam‚ and these are sometimes called steam power plants. Not all thermal energy can be transformed to mechanical power‚ according to the second law of thermodynamics. Therefore‚ thermal power plants also produce low-temperature heat. If no use is found for the heat‚ it is lost to the environment. If reject heat is employed as useful heat‚ for industrial processes or district heating‚ the power plant is referred
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respiration rate because the respiration decreased as the weight increased. I would say look at the results but the temperature was not constant on all weights so the results aren’t reliable for weight vs. respiration experiment. 7. The second law of thermodynamics
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