You have purchased an 8-bit r-2r digital to analog converter to control the joint position on a robotic arm (the position of which is proportional to the input voltage). a) the dac shows an output voltage of 1.21 v when the binary value 00100101 is applied. what is the full scale analog output range of this dac in volts? b) what voltage does the dac output with a binary value of 11101010 applied? c) if the joint rotates 8.6 degrees per applied volt v, what is the minimum joint rotation increment you can achieve with this dac?

An electrical motor raises a 50kg load at a construct velencity .calculate the power of the motor, if it takes 40sec to raise the load through a height of 24m(take g =9.8n/g)

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