30 ft 10 ft 15 ft N 12.5 ft ✓ 10 ft_ 15 ft

4000 N 2000 N 2 m 2 m F 60° 2 m 2 m 30° 45°

The resource limitation for the following project is 5R. What is the duration of this project after considering the resource limitation? 座 一國 5 13R 2R A 1 1R 2R C 3 4R SR O 18 O 12 O 15 0 9

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A differential equation encountered in the vibration of beams is d4ydx4=2D where x = distance measured along the beam; [x]=[L] y = displacement of the beam; [y]=[L] = circular frequency of vibration; []=[T1] = mass of the beam per unit length; []=[ML1] D = bending rigidity of beam; [D]=[FL2] Show that the equation is dimensionally homogeneous. Note that [F]=[MLT2] see Eq. (1.21:).

Using the information in Problem 1.22, estimate the ambient air temperature that could cause frostbite on a calm day on the ski slopes. 1.22 In order to prevent frostbite to skiers on chair lifts, the weather report at most ski areas gives both an air temperature and the wind-chill temperature. The air temperature is measured with a thermometer that is not affected by the wind. However, the rate of heat loss from the skier increases with wind velocity, and the wind-chill temperature is the temperature that would result in the same rate of heat loss in still air as occurs at the measured air temperature with the existing wind. Suppose that the inner temperature of a 3-mm-thick layer of skin with a thermal conductivity of 0.35W/mKis35C and the air temperature is 20C. Under calm ambient conditions the heat transfer coefficient at the outer skin surface is about 20W/m2K (see Table 1.4), but in a 40-mph wind it increases to 75W/m2K. If frostbite occurs when the skin temperature drops to about 10C, do you advise the skier to wear a face mask? What is the skin temperature drop due to the wind?

Time (hours) 24 Order Step 1 Step 2 A 1.20 1.40 В 0.90 1.30 2.00 0.80 D 1.70 1.50 E 1.60 1.80 F 2.20 1.75 1.30 1.40 A wholesale grocery distribution system uses a two-step process to fill orders. Tomorrow's work will consist of filling the seven orders shown in table. Determine a job sequence that will minimize the time required to fill the orders (use Johnson's rule)

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