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A contact resistance experiment involves pressing two slabs of different materials together, putting a known heat flux through them, and measuring the outside temperatures of each slab. Write the general expression for hc in terms of known quantities. Then calculate hc if the slabs are 2 cm thick copper and 1.5 cm thick aluminum, if q is 30,000 W/m2, and if the two temperatures are 15°C and 22.1°C.
fluid a available at 10oc is to be heated in a one-shell-pass four-tube-pass exchanger heat using fluid b available at
two particles a and b are travelling around a circle of redius 2m in opposite directions. the velocity of particle a
Calculate the boundary-layer thickness at the end of the plate (for the two cases). Assume laminar flow (Blasius solution) and use seawater properties from Table 1.1.
a large sphere i25mr2 rolls without slipping pure rolling across a horizontal surface. the sphere has a constant
the net potential energy between two adjacent ions en may be represented by sum of -ar brn. calculate the bonding
A projectile of mass m is fired from the surface of the Earth at an angle α from the vertical
Force and Torque on a Dam. A dam has the shape of a rectangular solid. The side facing the lake has area A and height H. The surface of the freshwater lake behind the dam is at the top of the dam.
a tensile force of 8 kn is applied to the ends of a solid bar of 7.35 mm diameter. under load the diameter reduces to
Discussion of various cycles attempted to meet the goal as well as the positive and negative aspects of your design.
an inward radial flow turbine is to develop 400 hp when supplied with air at 800c and 3 bar abs the exhaust total
for a metal that has a yield strength of 401 mpa and a plane strain fracture toughness kic of 21 mpa m12 compute the
The amplitude of the mass is found to be 0.05 m when the base is excited at the natural frequency of the system with Y0 = 0.01 m Determine the damping constant of the system.
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