An open container was monitored and found to have a toluene evaporation rate of 0.1 g/min. The ventilation rate is 2.84 m3/min, the temperature is 27°C, and the pressure is 1 atm. Estimate the concentration of toluene vapor in the enclosure and compare it to the TLV of 50 ppm. Perform the calculation for a k of 1.0 and 0.1.

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?

Two slings are used to lift a girder of length l and uniform weight per unit length. what is the best position for the slings if the bending moment due to the weight of the girder is to be kept to a minimum?

How to convert a friction to decimal ?