物理学theory exam 12理论考试.pdfVIP

PHYSICS

1)Ifyouraisethepressureofagasincontactwithaliquid-

a)Gasbubblesform

b)Theliquiddissolvesinthegas

c)Thegasdissolvesintotheliquid

d)Theliquidwillevaporate

2)Objectsinthewaterseemlargerdueto

a)Visualreversal

b)Refraction

c)Magnification

d)Absorption

3)Waterdissipatesbodyheatabout____timesfasterthanair.

a)4

b)7

c)20

d)200

4)Trueorfalse:Soundtravels4timesfasterinwater,makingitseemlikethesoundiscoming

fromoverhead.

5)Ifyoutakeagasvolumeof5litresinaflexiblecontainerfromthesurfaceto20metersin

freshwater,whatwillthenewvolumebe?

a)1.7litres

b)2.58litres

c)1.67litres

d)2.5litres

6)Atadepthof29minfreshwater,whatisthegaugepressure?

a)2.9Bar

b)3.8Bar

c)2.8Bar

d)3.9Bar

7)Trueorfalse:Thebodyrespondstothepercentageofagasinamixofairthatwebreathe

andnoteachgas’partialpressure.

8)Whatisthepartialpressureofeachgas(oxygenandnitrogen)inaNitrox32mixatadepth

of24mseawater?

a)O²:1.06bars/N²:2.26bar

b)O²:1.09bars/N²:2.31bar

c)O²:0.77bar/N²:1.63bar

d)O²:1.09bars/N²:2.26bar

9)Ifanobjecthas45kgpositivebuoyancyanddisplaces100litresofsaltwater,howmuch

weightmustbeaddedtomakeanobject25kgnegativelybuoyant?

a)55kg

b)83kg

c)58kg

d)70kg

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