According to some political pundits, a person who is radical (r) is electable (e) if he/she is conservative (c), but otherwise is not electable. a. which of the following are correct representations of this assertion? (i) (r ∧ e) ⇐⇒ c incorrect, this says all c are electable and radical (ii) r ⇒ (e ⇐⇒ c) correct, if radical, electable if and only if conservative (iii) r ⇒ ((c ⇒ e) ∨¬e) vacuous, true ⇒ true b. which of the sentences in (a) can be expressed in horn form?

An air conditioning system consist of a 5 cm diameter pipe, operating at a pressure of 200 kpa. the air initially enters the pipe at 15°c with a velocity of 20 m/s and relative humidity of 80%. if the heat supply throughout the process is 960 w, determine the relative humidity and the temperature at the outlet

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?

Calculate the bore of a cylinder that has a stroke of 18 inches and an extension time of 6 seconds at a flow rate of 4 gal/min.