3–24.If one cubic foot of substance Aweighs more than one cubic foot ofsubstance B, what is therelationship between the densitiesof substances A and B?1.The density of substance A isgreater than the density ofsubstance B2.The density of substance A isless than the density ofsubstance B3.The density of substance A isthe same as the density ofsubstance B4.Not enough information is givento determine the relationship3–25.Depth charges are dropped in thevicinity of a submerged submarine.The depth charge illustrated intextbook figure 10–1 is set so asto be exploded by the1.speed of the depth charge as itnears the submarine2.speed of the depth charge as itenters the water3.impact of the depth chargeagainst the hull of thesubmarine4.pressure of the water at theestimated depth of thesubmarine3–26.Hydrostatic pressure in a torpedois employed to1.maintain the torpedo on course2.launch the torpedo3.keep the torpedo at desireddepth4.increase the torpedo speed3-27.In a torpedo depth engine, thesetting of the depth screwdetermines the1.pressure of the air supplied tothe depth engine2.length of the pendulum3.angular set of the verticalrudders4.amount of force which isrequired to move the diaphragm3–28.The air pumped into a diver’s suithelps him or her to withstand thepressure of the water because1.pressure of the air in thediver’s suit is greater thanthe pressure of the water2.air enters the diver’s body sothat the pressure inside his orher body is equal to the waterpressure3.air is compressible and wateris not4.force is not transmitted by air3-29.The pressure in a diver’s suit mustbe released gradually because1.if pressure is released toorapidly, the air which enteredthe diver’s body under highpressure will cause bubbles toform in his or her blood stream2.the diver’s lungs cannotquickly become adjusted tobreathing air at normalpressure3.the diver’s blood circulationwas partly cut off while underhigh pressure, and suddenreturn of normal circulation ispainful4.air at normal pressure containsless oxygen than air at highpressure,and the body mustadjust to this conditiongradually3–30.The pitometer log determines thespeed of a ship by measuring thedifference between1.hydrostatic pressure near thekeel of the ship andhydrostatic pressure near thewater line2.hydrostatic pressure and thepressure of water in motionpast the ship at the same depth3.pressure of the water movingpast the ship and atmosphericpressure4.pressure of the water movingpast the ship and the speed ofsurface wind25
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