To warm up a glass of milk initially at 3 C, a mother places the glass in a large pan filled up with water at 70 C. The glass is thin-walled, d=6 cm. The height of the milk in the glass is H=7 cm. Assume that the milk is stirred often enough so that its temperature is nearly uniform. The heat transfer coefficient between the milk and the glass is h=120 W/m2-K. Determine the time needed to warm up the milk from 3 C to 38 C

When using the ohmmeter function of a digital multimeter, the leads are placed in what position relative to the component being tested? a. parallel b. control c. series d. line

Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.

Atank with constant volume contains 2.27 kg of a mixture of water phases (liquid-vapor). in the initial state the temperature and the quality are 127 °c and 0.6, respectively. the mixture is heated until the temperature of 160 oc is reached. illustrate the process in a t-v diagram. then, determine (1) the mass of the vapor in kg at the initial state, (2) the final pressure in kpa.