Q: What could be the applications of materials with high thermal capacity
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Q: A 2.44 m wide by 1.15 m high metal plate must be insulated to prevent contact burn injuries. If the…
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Q: The thermal contact conductance at the interface of two 1-cm-thick copper plates is measured to be…
A: The thermal contact resistance is given by,
Q: Confirm that the units nRT of are those of energy for each value of R : (a) 8.31 J/mol.K, (b) 1.99…
A: units of nRT
Q: How can I calculate the specific heat capacity of a metal?
A: Calculation of specific heat capacity requires data from an experiment in which heat is exchanged…
Q: Why do we characterize the heat conduction ability of insulators in terms of their apparent thermal…
A: Usually insulators are made by mixing fibers, powders of flakes of insulating materials with air.
Q: A copper rod, an aluminum rod, and a brass, each 6.00 m in length and 1.00 cm in diameter, are…
A: We say, TH is 100° C, TC is 0° CT1 → temperature of the copper-aluminium junctionT2→ temperature of…
Q: The sensitivity of a thermocouple is 0.05 mV/K. If the voltage range is from 0-50 mV and the lowest…
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Q: The wall of a house consists of an outer layer of brick, coated with cement and a layer of plaster…
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Q: From the surreal realm of deep-seahydrothermal vents 200 miles offshore from Puget Sound, comesa…
A: Let, the temperature in Celsius be denoted by 'C' and the temperature in Fahrenheit be denoted by…
Q: A close analogy exists between the flow of energy by heat because of a temperature difference (see…
A: Electrical Resistance is associated to conduction of electricity. And ohm's law states that:…
Q: EXAMPLE 1.1 At a temperature of 27°C (common temperature for components in an enclosed operating…
A: We know that the thermal voltageVT=KTqwhere K=1.38 x 10-23 J/KTemperature T=27° =27+273 = 300Kq=1.6…
Q: Baseboard heaters are basically electric resistance heaters and are frequently used in space…
A: According to the law of thermodynamics, there is no such engines which is 100% ideal.
Q: A copper phone wire has essentially no snag between poles 35m apart on a winter day when the…
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Q: A rod is made of two different layers: chromium and copper; as shown in the diagram below. Both…
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Q: Veritasium (Vr) boils at 30.3°C and its enthalpy of vapourization is 67.3 kJ mol-1. Calculate ΔSsys…
A: Enthalpy of vaporization,(H)=67.3 kJ mol-1=67.3 x 103 J mol-1 -----(1) [Given] [Using 1 KJ=103 J]…
Q: The below shown graph is drawn from the tabulated values of brass which we measured during the…
A: Refer to the (x,y) coordinates of points 1 and 2 below : 1→(6,45.5)2→(6.7,38) (a) Difference in…
Q: as a child, we were taught about molecules and atoms and how they work. now we are grown up and…
A: The answer for the following questions will be
Q: Confirm that the units of nRT are those of energy for each value of R : (a) 8.31 J/mol ⋅ K , (b)…
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Q: The thermal conductivity of an insulator has a maximum at about 10% of the Debye temperature. Why…
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Q: A rod is made of two different layers: chromium and aluminum; as shown in the diagram below. Both…
A: Given:L = 0.22 mArea A = 0.1 cm2K1 = 93.7 W/m.kK2 = 237 W/m.kTright = 6.5°CTleft = 60.4°C Using heat…
Q: A PV module produces 200W maximum power at 1000W/m2/Assuming constant temperature, calculate the…
A: Maximum Power 200W at 1000W/m2 The maximum power output of a PV device is generally proportional to…
Q: Calculate the mean free time between collisions in copper at room temperature.
A: The mean free time (t) between collisions is the average time taken by an electron inside a…
Q: brass, each 6.00 m in length and 1.00 cm in diameter, are placed end to end with the aluminum rod…
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Q: Calculate the specific heat capacity at constant volume of water vapor, assuming the nonlinear…
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Q: Why (in both thermodynamic and molecular terms) should substances with high heat capacities have…
A: The heat capacity is given by c=∆Q∆T Using the second law of thermodynamics, the entropy is given by…
Q: A family comes home from a long vacation with laundry to do and showers to take. The water heater…
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Q: Uranium has two common isotopes, with atomic masses of 238 and 235. One way to separate these…
A: In this question it is given that a uranium has two common isotopes with atomic masses of 238 and…
Q: A copper rod, an aluminum rod, and a brass rod, each of6.00 m length and 1.00 cm diameter, are…
A: Consider the temperature at the free end of the copper rod, that is the hot junction, be Th, the…
Q: The below shown graph is drawn from the tabulated values of brass which we measured during the…
A: data given in graph Question ? Difference in temperature ? Difference in distance between test…
Q: One mole of an ideal gas at standard temperature and pressure occupies 22.4 L (molar volume). What…
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Q: Integrated Concepts(a) At what depth in fresh water is the critical pressure of water reached, given…
A: The pressure at sea level,
Q: Integrated ConceptsHow much time is needed for a surgical cauterizer to raise the temperature of…
A: Determine the heat required to raise the temperature of the tissue and boil away from the water as…
Q: Diameter of a Solid conductor wire is 2.54 cm and the thickness of the insulation is 3 mm. When the…
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Q: In about 5 sentences can you please explain to me that is the Heat Current “H” the same or different…
A: To explain : Whether the heat current is same or different when someone is sitting on a metal or…
Q: hypothetical metal A is stiffer than metal B, Has lower thermal expansion coefficient than B, and…
A: given A is stiffer than than B
Q: Which of the following works for Superposition Theorem? O a. If only one source is present O b. If…
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Q: What is the process called when solid carbon dioxide (a.k.a dry ice) passes directly into a gaseous…
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Q: A bar of gold is in thermal contact with a bar of silver of the same length and cross-section (see…
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Q: A rod is made of two different layers:chromium and granite; as shown in the diagram below. Both…
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Why is it that only electrons near EF contribute to the electrical and thermal
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- Explain with scientific reasons the top three properties of Si which make it suitable for photovoltaic application?1) a) A wire sample (1 mm in diameter by 1 m in length) of an aluminum alloy (containing 1.2% Mn) is placed in an electrical circuit such as that shown in the figure below. A voltage drop of 432 mV is measured across the length of the wire as it camies a 10 A current. Calculate the electrical conductivity of this alloy -Length, / Area, A Sample geometry b) Copper has an electrical conductivity of 58.00 x 106 S/m and a free electron density of 104 x 10²7m²³. Calculate the drift velocity of these electrons under an electric field of 0.5 V/m.Please Answer this im begging you. begin begin youhuhu The problem is IIc - 21, from the book ENGINEERING THERMOFLUIDS, M. MASSOUD.
- design an apparatus that could be constructed to measure the thermal conductivity of solid samples in the range of 50 to 300 W/m . K. Write a brief report discussing in detail the overall size of the apparatus; components of the apparatus, including the heating source, the cooling source, insulation materials; and the measurement elements. In the report, include drawings and a sample experiment. Estimate the cost of such a setup and briefly discuss it in your report. Also, write a brief experimental procedure that could be used by someone who is unfamiliar with the apparatus.What is the physical significance of the Biot number? Is the Biot number more likely to be larger for highly conducting solids or poorly conducting ones?Car manufacturers are developing engines that use H2 as fuel. In Iceland, Sweden, and other parts of Scandinavia, where hydroelectric plants produce inexpensive electric power, the H2can be made industrially by the electrolysis of water.(a) How many coulombs are needed to produce 3.5x106 L of H2gas at 12.0 atm and 25oC? (Assume that the ideal gas law applies.)(b) If the coulombs are supplied at 1.44 V, how many joules are produced?
- Question 1 a) Ina closed circuit, an electric current of intensity i goes through a resistor of resistance R. The electric potential at the edges of R is measured to be V. If now we write R would this generally bethe definition ofthe resistance quantity R, or the expression of Ohm's Law? Explain. b) We define the resistivity (via the familiar notation) as E p= Thus show that the resistance R can be written as, R =p- here Lis the length ofthe resistor, and A is the cross-sectional area ofit. c) Let J the curent density (i/A). Express J in tems of the electron density n (electrons/m), the electron drift velocity va, and the electron charge e. d) Show that the resistivity can be expressed (via the familiar notation) as, m p= ne't here m is the electronmass; t is the period of time that elapses between two subsequent collisions, the electron undergoes with copper nuclei throughout its chaotic motion in the body of copper (supposing that the current carrying cable is made of copper). Hint:…(a) Construct a table showing the macro states and all of the individual microstates for tossing 13 coins. (Use Table 15.5 as a guide.) (b) How many macro states are there? (c) What is the total number of microstates? (d) What percent chance is here of tossing 5 heads and 1 tail? (e) How much more likely are you to toss 3 heads and 3 tails than 5 heads and 1 tail? (Take me ratio of the number of microstates to find out.)Figure I shows the P-V graph for a sample of a gas at 298 K. If this sample were heated to 312 K, this would be represented by a point 25. atm Figure 1 100 V/e 50 A At the top, left end of the line Off the line, above and to the right of it. B At the lower, right end of the line D Off the line, below and to the right of it.
- Can i get help with this physics questions, energy conversion and coal 1. A company has consumed 245345 tons of coal (lignite) and wishes to obtain an estimate of the energy equivalent of that amount of coal. Note that Net Calorific Values (NCV) of the coal type is 11.9 TJ/Gg. Calculate the energy equivalent.2. A company has consumed 4456 m3 of Diesel and wishes to obtain an estimate of the energy equivalent of that amount. Note that Net Calorific Values (NCV) of diesel is 43 TJ/ Gg and its density is 0.84 kg / I. Calculate the energy equivalent.3. A gas furnace has an efficiency of 75%. How many BTU will it produce from 1000 BTUof natural gas.Briefly explain the opacity and translucency in insulators.Steel coated with a thin layer of ceramic to help protect against corrosion. What do you expect to happen to the coating when the temperature of steel is increased significantly? Explain this behavior and relate it with the role of the bonding energy of the atoms.