The following data resulted from a study taken on a horizontal milling machine: pieces produced per cycle: 8 average measured cycle time: 8.36 min average measured effort time per cycle: 4.62 min average rapid traverse time: 0.08 min average cutting time power feed: 3.66 min performance rating: 115 percent allowance (machine time): 10 percent allowance (effort time): 15 percent the operator works on the job a full 8-h day and produces 380 pieces. how many standard hours does the operator earn? what is the operator’s efficiency for the 8-h day?

Apiano tuner uses a tuner to create a tone of 5.00 x 10² hz. when a key on the piano is struck he hears 5 beats per second. what is a possible frequency of vibration for the piano string? 2500 hz 1300 hz 605 hz 495 hz

Acoal-fired plant generates 600 mw of electric power. the plant uses 4.8 x 10^6 kg of coal each day, and the heat of combustion of coal is 3.3x 10^7 j/kg. the steam that drives the turbines is at a temperature of 300° c, and the exhaust water is at 37° c. (a) what is the overall efficiency of the plant for generating electric power? (b) how much thermal energy is exhausted each day? (c) what is the change in entropy of the universe for this heat engine? (d) using the same heat reservoirs, what is the maximum possible (carnot) efficiency for a heat engine?

He viscosities of several liquids are being compared. all the liquids are poured down a slope with equal path lengths. the liquid with the highest viscosity will