1. According to Wiedmann-Franz law, at a given temperature, the thermal and electrical conductivities of metals...
According to the law of diminishing returns a. Production increases at a decreasing rate b. Production increases at a increasing rate c. Production decreases at a decreasing rate d. Production decreases at an increasing rate
A3. (a) According to Fourier's Law of thermal conduction, the heat flux through a solid is given by the solid's thermal conductivity k multiplied by the negative of the local temperature gradient. If the temperature in the solid is given by the function T(x, y, z)= 30e **(y2 + z), determine an expression for the heat flux through an internal surface with normal n=2i+j+2k [7 marks) (b) If f(t)=3sin ox and g(t)= 2 cos(@t++), determine the amplitude of the function...
Which statement is true? Select one: O a. The electrical conductivity of a semiconductor increases with temperature b. The resistivity of a semiconductor increases with temperature o c. Metals and semiconductors have similar electrical conducting properties O d. The electrical conductivity of a metal increases with temperature Save response Which statement is true about an XY2 lattice? Select one: O a. The unit cell contains twice as many X2n+ ions as Yn- b. The coordination environments of x2n+ and Yn-are...
Which of the following accurately states Dalton's law of partial pressures? A. The rate of effusion of a gas is inversely proportional to the square root of its molar mass. B. The pressure of any gas is not dependent on the size of the gas molecules. C. The volume of a given amount of gas at constant temperature is inversely proportional to its pressure. D. The pressure of any atmosphere increases with increasing elevation. E. The volume of a gas...
*SHOW YOUR WORK* (Boyle's Law): 1. What is the final volume (in mL) or argon gas is 50.0 mL at 705 torr is compressed to a pressure of 2.75 atm, at constant temperature? (Lewis Dot Structures): 2. Draw Lewis structures for the following molecules. Include partial charges, AXE designation, (example: AX2 E2), Electron-pair geometry and geometric-molecular shapes. Is it Polar or Non-Polar? CH2Cl2 SO2 3. Which of the following explains why the pressure of a gas increases when the temperature...
. The thermal conductivity of air as a function of temperature is given in the table below temperature (kK) 1 .2 3 4 5 .6 thermal conductivity (W/(m K))9.4 18.4 26.2 33.3 39.7 x (a) Estimate the thermal conductivity of air when T 24 kK using the Newton form of the interpolating polynomial (b) If the thermal conductivity at T.6kK is found out to be 45.7, find the Newton form of the interpolating polynomial without reconstructing the entire divided difference...
Question 1: Which of the following provides evidence that the thermal energy of an object is decreasing? Select one: a. Its speed is increasing b. ts speed is decreasing C. Its temperature is increasing d. Its temperature is decreasing Question 2: A block is observed to slide across the table, slowing down to a stop The homework slide for this question shows the four possible S/R energy diagrams for this interaction. Which one of the four S/R energy diagrams might...
1. Ferrous metals include which of the following A Aluminum B. Copper C Gold D. Steel 2. The two categories of metals that are based onion (Fe) are A Aluminum Alloy & Castle B. Chromium & Nickel C. Manganese & Vanadium D. Cast Iron & Steel 3. Aluminum Alloy, Nickel Alloy, Zinc Alloy, and Titanium Alloy are cumples of A Nonferrous Metals B.Ceramics C Superllos D. Carmets 4. In the heating of most metal alloys melting begins at a certain...
Resistance in metals increases with increasing temperature according to the equation, ρ(T) = ρo(1 + α(T - To)) where α is the temperature coefficient of resistivity and ρo is the resistivity at temperature To. For a particular wire α = 1.5 × 10-3 1/°C and the resistivity is ρo = 8.5 × 10-7 Ω⋅m at To = 125 °C.
e letter that corresponds to the correct an 1. The resistance of a resistor: (a) Do es not depend on its size and properties of the material. (b) is directly proportional to the electrical conductivity. (c) is inversely proportional to the electrical conductivity. d) is inversely proportional to the resistivity. 2. The resistivity of pure copper is much less than commercially pure copper because (a) Impurities in commercial pure copper increase the resistivity. (b) Resistivity is not a microstructure sensitive...