1. A 110-V wall outlet supplies power to a strobe light with the resistance of 1 800 Ω. How much current is flowing through the strobe light? 2. A CD player with a resistance of 50 ohms has a current f 0.2 amps flowing through it. Calculate how many volts supply the CD player?

3. A CD player with a resistance of 50 ohms has a current f 0.2 amps flowing through it. Calculate how many volts supply the CD player?

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?

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false

Slip occurs via two partial dislocations because of (a) the shorter path of the partial dislocation lines; (b) the lower energy state through partial dislocations; (c) the charge balance.