Consider a hot dog to have the following dimensions and properties: diameter = 20 mm, cp = 3.35 kj/kg⋅k, rho = − 880 kg/m3, and k = 0.5 w/m⋅k. for the hot dog initially at 5 c, exposed to boiling water at 100 c, with a surface coefficient of 90 w/m2⋅k, what will be the cooking time if the required condition is for the center temperature to reach 80 c?

The drive force for diffusion is 7 fick's first law can be used to solve the non-steady state diffusion. a)-true b)-false

Vibration monitoring this technique uses the noise or vibration created by mechanical equipment and in seme cases by plant systems to detemine their actual condtion. a)- true b)- false

Asolid cylinder is concentric with a straight pipe. the cylinder is 0.5 m long and has an outside diameter of 8 cm. the pipe has an inside diameter of 8.5 cm. the annulus between the cylinder ad the pipe contains stationary oil. the oil has a specific gravity of 0.92 and a kinematic viscosity of 5.57 x 10-4 m2/s. most nearly, what is the force needed to move the cylinder along the pipe at a constant velocity of 1 m/s?