A firm produce 2400 items annually the cost of setting up for production is 850 and weekly production rate is 100 units. The production cost is 5 per item. The annual storage and carrying is 10% if average inventory. what is the time that each optimum production run will take? options
12 months
9 months
6 months
1 months

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

Aplate clutch has a single pair of mating friction surfaces 250-mm od by 175-mm id. the mean value of the coefficient of friction is 0.30, and the actuating force is 4 kn. a) find the maximum pressure and the torque capacity using the uniform-wear model. b) find the maximum pressure and the torque capacity using the uniform-pressure model.

The filament of an incandescent lamp has a temperature of 2000k. calculate the fraction of radiation emitted in the visible light band if the filament is approximated as blackbody