Aplane stress element has σ,-4750 psi, σ,-1200 psi, and τ,-950 psi ccw. a) draw mohr's circle. b) find the principal stresses and show them on a sketch of a properly oriented element c) find the maximum shear and show them on a sketch of a properly oriented element that shows the orientation of the maximum shear stress planes and all other stresses acting on those planes

Consider a 1000 w iron whose base plate is made of 0.5 cm thick aluminum alloy 2024-t6 (ρ = 2770 kg/m3 and cp = 875 j/kg°c). the base plate has a surface area of 0.03 m2. initially, the iron is in thermal equilibrium with the ambient air at 22°c. assuming 90% of the heat generated in the resistance wires is transferred to the plate, determine the minimum time needed for the plate temperature to reach 200°c.

How does an observation about an object differ from an inference about that object

Which basic property determines a colored light's placement on the spectrum of visible light? a. speed b. frequency c. amplitude d. velocity