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(10pts) Consider a floor made of parallel strips of wood having the same width W and...
You are standing on a wood floor made of oak strips 2 inches wide. You drop a nail that is 2 inch...
You are standing on a wood floor made of oak strips 2 inches wide. You drop a nail that is 2 inches long randomly on the floor. What is the chance that the nail will lay across the boundary between two strips of flooring?
[e]. Consider 2 metallic strips A (top) and B (bottom) of identical length (), width (w) and thic...
Consider 2 metallic strips
[e]. Consider 2 metallic strips A (top) and B (bottom) of identical length (), width (w) and thickness (see the sketch below). Strip A has a higher coefficient of thermal expansion compared to strip B. The strips are bonded together and the temperature is raised by AT 0. What shape will the two strips take? Show it with a sketch. Also, will they have thermal stresses? If so, specify the stress state in each strip. When...
[e]. Consider 2 metallic strips A (top) and B (bottom) of identical length (D, width (w) and thic...
[e]. Consider 2 metallic strips A (top) and B (bottom) of identical length (D, width (w) and thickness (see the sketch below). Strip A has a higher coefficient of thermal expansion compared to strip B. The strips are bonded together and the temperature is raised by AT>0. What shape will the two strips take? Show it with a sketch. Also, will they have thermal stresses? If so, specify the stress state in each strip. When attempting this problem, assume that...
Consider a thin film of silicon grease (n=1.5) between two flat microscope slides having length L=10cm....
Consider a thin film of silicon grease (n=1.5) between two flat
microscope slides having length L=10cm. The top slide is made of
plastic (n=1.4) and the bottom slide is made of glass (n=1.6). at
one end the slides are in contact and at the other end they are
separated by a wire that has width h=.02mm. Assume we are using a
monochromatic light source of wavelength
=500nm.
what is the spacing between the dark fringes?
A tube with length of 1 m is made from steel (k 15 W/m/K) having a...
A tube with length of 1 m is made from steel (k 15 W/m/K) having a square cross section with a circular hole through the center, as shown below Calculate the steady state temperature distribution across the cross section and the total rate of heat transfer if the inner surface is held at 20 °C, and the outer surface is held at 100 °C. How does the heat rate vary with grid resolution? Consider 9 and 17 grid points across...
(1) A pig lying on a 2.0 cm thick wood floor has its belly in contact...
(1) A pig lying on a 2.0 cm thick wood floor has its belly in contact with the floor. Let the contact surface area of pig's belly and floor floor be 3000 cmn'. The floor is cooler than the pig's body temperature (30°C), and at a temperature of 0.0 °C. The thermal conductivity of wood is 0.126 W/m °K. What is the conductive heat transfer under steady-state conditions? (2) The Born energy EB (SI unit kcal/mol) is a measure of...
Consider a cylindrical capacitor like that shown in Fig. 24.6. Let d = rb − ra...
Consider a cylindrical capacitor like that shown in Fig. 24.6. Let d = rb − ra be the spacing between the inner and outer conductors. (a) Let the radii of the two conductors be only slightly different, so that d << ra. Show that the result derived in Example 24.4 (Section 24.1) for the capacitance of a cylindrical capacitor then reduces to Eq. (24.2), the equation for the capacitance of a parallel-plate capacitor, with A being the surface area of...
Clearly state your solution path. Partial credit will only be given for clear steps. Units must...
Clearly state your solution path. Partial credit will only be given for clear steps. Units must be provided or points will be subtracted. Clearly label the end result, use double lines to underscore or box the final result. Note the equation sheet is on the back. (10 pt) An electron enters a region between two capacitor plates with equal and opposite charges. The plates are L=0.1 m by 0.05 m and the gap between the plates is h=0.001 m. During...
IT PYTHON QUESTION1 Consider the following Python code, where infile.txt and outfile.txt both exist in the current directory 'z' ) 。1d = open ( ' infile. txt ' , for line in o...
IT PYTHON
QUESTION1 Consider the following Python code, where infile.txt and outfile.txt both exist in the current directory 'z' ) 。1d = open ( ' infile. txt ' , for line in old: new.write (line) new.write') ne«.close () old.close) Which of the following options best describes the purpose or outcome of this code? O A copy of the file infile.txt is made (except in double line spacing) and saved as outfile.txt in the current directory. O A copy of the...
3R MC 12 Two identical solenoids are connected to each other so that they carry the same current, and are inserted thro...
3R MC 12 Two identical solenoids are connected to each other so that they carry the same current, and are inserted through two loops in an electrical circuit, as shown left diagram. The solenoids are oriented such that when you loolk from one end, the currents are circulating in opposite directions, as showin in the second diagram. For a period of time, the current flowing through the solenoids is changing in a steady linear manner: It) ~ t. During this...
Consider 2 metallic strips
[e]. Consider 2 metallic strips A (top) and B (bottom) of identical length (), width (w) and thickness (see the sketch below). Strip A has a higher coefficient of thermal expansion compared to strip B. The strips are bonded together and the temperature is raised by AT 0. What shape will the two strips take? Show it with a sketch. Also, will they have thermal stresses? If so, specify the stress state in each strip. When...
[e]. Consider 2 metallic strips A (top) and B (bottom) of identical length (D, width (w) and thickness (see the sketch below). Strip A has a higher coefficient of thermal expansion compared to strip B. The strips are bonded together and the temperature is raised by AT>0. What shape will the two strips take? Show it with a sketch. Also, will they have thermal stresses? If so, specify the stress state in each strip. When attempting this problem, assume that...
Consider a thin film of silicon grease (n=1.5) between two flat
microscope slides having length L=10cm. The top slide is made of
plastic (n=1.4) and the bottom slide is made of glass (n=1.6). at
one end the slides are in contact and at the other end they are
separated by a wire that has width h=.02mm. Assume we are using a
monochromatic light source of wavelength
=500nm.
what is the spacing between the dark fringes?
A tube with length of 1 m is made from steel (k 15 W/m/K) having a square cross section with a circular hole through the center, as shown below Calculate the steady state temperature distribution across the cross section and the total rate of heat transfer if the inner surface is held at 20 °C, and the outer surface is held at 100 °C. How does the heat rate vary with grid resolution? Consider 9 and 17 grid points across...
(1) A pig lying on a 2.0 cm thick wood floor has its belly in contact with the floor. Let the contact surface area of pig's belly and floor floor be 3000 cmn'. The floor is cooler than the pig's body temperature (30°C), and at a temperature of 0.0 °C. The thermal conductivity of wood is 0.126 W/m °K. What is the conductive heat transfer under steady-state conditions? (2) The Born energy EB (SI unit kcal/mol) is a measure of...
Consider a cylindrical capacitor like that shown in Fig. 24.6. Let d = rb − ra be the spacing between the inner and outer conductors. (a) Let the radii of the two conductors be only slightly different, so that d << ra. Show that the result derived in Example 24.4 (Section 24.1) for the capacitance of a cylindrical capacitor then reduces to Eq. (24.2), the equation for the capacitance of a parallel-plate capacitor, with A being the surface area of...
Clearly state your solution path. Partial credit will only be given for clear steps. Units must be provided or points will be subtracted. Clearly label the end result, use double lines to underscore or box the final result. Note the equation sheet is on the back. (10 pt) An electron enters a region between two capacitor plates with equal and opposite charges. The plates are L=0.1 m by 0.05 m and the gap between the plates is h=0.001 m. During...
IT PYTHON
QUESTION1 Consider the following Python code, where infile.txt and outfile.txt both exist in the current directory 'z' ) 。1d = open ( ' infile. txt ' , for line in old: new.write (line) new.write') ne«.close () old.close) Which of the following options best describes the purpose or outcome of this code? O A copy of the file infile.txt is made (except in double line spacing) and saved as outfile.txt in the current directory. O A copy of the...
3R MC 12 Two identical solenoids are connected to each other so that they carry the same current, and are inserted through two loops in an electrical circuit, as shown left diagram. The solenoids are oriented such that when you loolk from one end, the currents are circulating in opposite directions, as showin in the second diagram. For a period of time, the current flowing through the solenoids is changing in a steady linear manner: It) ~ t. During this...
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