A88.9 kg tight rope walker falls from a wire positioned above a safety net. if their potential energy exactly half way down from the top is 2,338 j, what height was the wire positioned above the safety net? note : therefore, if using accelration due to gravity, only use positive 9.81 m/s/s , express your answer as a number rounded to 2 decimal places

Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?

Which from the following instrument is commonly used to detect the high pitch butzing sound in bearings? [clo4] a)-digital ultrasonic meter b)-infrared camera c)-spectroscopic d)-vibrometer

Inadequate stores control is not an obstacle to effective work order system. (clo4) a)-true b)-false