Given a plaster of paris (PoP) slab with L = 0.052 cm, W = 0.052 cm, and H = 0.0095 cm, what is the heat transfer coefficient if the biot number is 0.19682? Other data (if necessary): Initial Temperature: 328.2 C Surrounding Temperature: 27.9 C PoP Density: 680 kg/m^3 Heat Capacity: 1090 J/kgK Thermal Conductivity: 0.1185 W/mK

Stainless steel type 304 [k = 16.3 W/m-K] from heat treatment was brought to a room @ 27C. It is in cube form and has an edge of side 20cm. Initially, the temp. of the steel from the heat treatment is 500C. The total effective heat transfer coefficient is 18 W/m2-K. How long will it take for the surface of the cube to be within 28 C of the room temp.?

"You did calculations using the simplified HAZ time-temperature formulas, assuming 3D heat flow, and are presenting your final internship conclusions to management. You realize with horror, in the middle of your presentation, that you forgot to label your calculated curves (below). Which curve is which? Pick the best answer A: "Plot 1 is HYPERFILL® and Plot 2 is p-GMAW. Since HYPERFILL® has the higher heat input, it cools more slowly."     B: "Plot 2 is HYPERFILL® and Plot 1 is p-GMAW. Since HYPERFILL® has the faster travel speed of the two processes, it cools faster."     C: "Plot 1 is p-GMAW and Plot 2 is HYPERFILL®. Since p-GMAW has the slower travel speed, it cools more slowly."     D: "Plot 2 is p-GMAW and Plot 1 is HYPERFILL®. Since p-GMAW has the lower heat input, it cools faster"     Both (A) and (D)

YA A Problem 1. Prismatic cylindrical bar AB of height H is mounted on a rigid base. The bar has diameter, D, Young's modulus, E, mass density, p, Poisson's ratio, v and thermal expansion coefficient, a. It is acted upon by the force of its own weight due to gravitational acceleration, g, acting downward, and has a temperature change that varies from AT, at the base to zero at the top. In terms of the given quantities, find: D,E, ρ, ν, α H The elongation, 8, of the bar, a) The normal stress, o(y), b) The axial strain, ɛ(y), and c) (p The change in diameter, AD(y). ATO