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The wall thickness can be minimized by insulation layer
The wall thickness can be minimized by insulation layers. A typical wall having of a brick layer that has a thickness of d1 = 15 cm at the outside, a concrete layer with a thickness of d2 = 10 cm, an insulation layer (polystyrene foam) of thickness d3 and a gypsum layer with a thickness of d4 = 5 cm on the inside of the wall. Measure the thickness of the insulation layer and the total thickness of the wall to fulfil the needs of an energy-saving house.
1. A sample of water contains: suspended matter = 100 mg; Ca(NO3)2 = 16.4 mg/L; MgSO4 = 24 mg/L; MgCl2 = 19 mg/L; NaOH = 40 mg/L and KOH = 56 mg/L. Calculate temporary, permanent a
Q. Explain about Bohr atomic model? Bohr anticipated that hydrogen's single electron could orbit at only specific distances from the atom's nucleus. When the electron is in the
why was hydrochloric acid added?
A tank containing 100 kg of a 60% brine (60% salt) is filled with a 10% salt solution at the rate of 10 kg/min and 78°F. Solution is removed from the tank at the rate of 15 kg/min.
Q. Determine the taste threshold for different sensations? • perceive the individual differences existing for taste stimulation, and • identify your own threshold and iden
One mole of gas A decomposed exothermically into one mole of gas B and one mole of gas C with Kp = 1.8 x 10-5 at 300 K. If the initial pressure of each gas was 0.150 atm, what were
how did the british discover this isotope on different things when they investigated the Litvenko murder
Calculate the expected enthalpy of hydrogenation of a six-membered ring with three double bonds and compare it with the value obtained in 74.1. What is the reason for this diffe
Q.Illustrate the Basic structure of polymers? Ans. Polymers are large organic compounds made of regularly repeating units. Plastics are made of polymers. Polymers ar
A student recreates the milikan oil drop experiment and tabulates the relative charge of oil drops in terms of a constant a. Find the charge of a Drop 1. A Drop 2. 3/2 a Drop
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