Calculate the number of atoms sampled in a 1-μm-diameter by 1-μm-deep cylinder in the surface of solid copper.
Calculate the number of atoms sampled in a 1-μm-diameter by 1-μm-deep cylinder in the surface of...
Surface Area to Volume Derive an expression that relates the surface area (SA) of a cylinder to the volume (V) of a cylinder (i.e., SA:V). Then derive an expression that relates the SA:V of one cylinder to that of another cylinder and use this relationship to compare the SA:V of a ~cylinder-shaped Escherichia coli to the SA:V of a ~cylinder-shaped Bacillus megaterium. E. coli is 2 μm in length and 0.5 μm in diameter whereas B. megateriumis 4 μm in...
3. A thermocouple is used to measure the surface temperature of an object. The center of a thermocouple bead of diameter D-100 μm is positioned at a distance 10 μm from the surface of interest. The two thermocouple wires, each of diameter d = 1 mm and length L-250 mm, are held by a large manipulator that is at a temperature of Tm-25 °C. The thermal conductivities of the Nicrosil and Nisil thermocouple wires are Kvic respectively. We can neglect...
8. Consider a cylindrical surface and a disk oriented coaxially as shown in the figure below. The cylinder has diameter D and a length L. The disk of diameter D is placed coaxially with the cylinder at a distance L. If L 2D, determine the view factor F12 between the cylinder surface (1) and the disk (2) facing it. Cylindrical Surface Disk L L 8. Consider a cylindrical surface and a disk oriented coaxially as shown in the figure below....
Calculate the number of atoms in a 1.4 nm diameter platinum nanoparticle using the total number of unit cells present. Consider a FCC unit cell with a lattice constant of a = 3.91 Å. Explain the interest in small platinum or palladium nanoparticles for catalysis.
A 1-in-diameter solid round bar has a groove 0.1-in deep with a 0.1-in radius machined into it. The bar is made of AISI 1020 CD steel and is subjected to a purely reversing torque of 1800 lbf • in. For theS-N curve of this material, let f = 0.9.(a) Estimate the number of cycles to failure.(b) If the bar is also placed in an environment with a temperature of 750°F, estimate the number of cycles to failure.
A 1-in-diameter solid round bar has a groove 0.1-in deep with a 0.1-in radius machined into it. The bar is made of AISI 1020 CD steel and is subjected to a purely reversing torque of 1800 lbf.in. For the S-N curve of this material, let f = 0.9. (a) Estimate the number of cycles to failure. (b) If the bar is also placed in an environment with a temperature of 750degreeF, estimate the number of cycles to failure.
6a. The aerodynamic drag acting on a cylinder at a very low Reynolds number (Stokes flow or creeping motion) is a function of dynamic viscosity of fluid (u), diameter of cylinder (D) and freestream velocity (U). Find a non-dimensional parameter using dimensional analysis. 6b. A model test is to be conducted in a water tunnel using a 1: 20 model of a submarine, which is to travel at a speed of 12 km/h deep under sea surface. The water temperature...
A cylinder of diameter 0.6 m and length of 15 m with surface temperature of 200 Celsius is enclosed in a square of 1.2 m side, the material having a thermal conductivity of 2.5 W/mk. the outside surface at 5 Celsius . Determine the heat loss in W
Problem 1) A 1 in diameter solid round bar has a groove 0.1 in deep with a 0.1 in radius machined into t. The bar is made of AISI 1040 CD steel and is subjected to rotating-bending load and the bending moment is 1800 lbf in. Determine the life of the shaft.
how to calculate ratio surface atoms to volume for 1 meter gold sphere