During an accident, a heavy vehicle's tyre with inner diameter 0.8m and outer diameter 1.2m is immersed in water with its plane making an angle of 45 degree with the horizontal free surface of water. The center of the inner and outer diameters of tyre is located at 1.625m below the free surface. What will be the total pressure force on the face of the tyre?

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?

Give heat transfer applications for the following, (i) gas turbines (propulsion) ) gas turbines (power generation). (iii) steam turbines. (iv) combined heat and power (chp). (v) automotive engines

Draw the engineering stress-strain curve for (a) bcc; (b) fcc metals and mark important points.