Buoyancy and Pressure in Liquid

1A

B

C

D

FgV

AVFA

BB

CVC

DVFF

D

279g7.9g/cm3????g10N/kg

GgVFgV

m79g0.079kg7.9g/cm3mGmFm0.079kgGmg0.079kg10N/kg0.79NVV10 cm3mgV1g/cm310 cm310g=0.01kgFmg0.01kg10N/kg0.1N VV

343N33.25N________m38.9103kg/m3

G43NF33.2NV

FGF43N33.2N9.8NV1103m3VV1103m3V

0.49103m3VVV1103m30.49103m3 0.51103m30.51103m34ABC151GAGBGCABC

151

1ABC

GAFAGBFBGCFC

ABC

VAVBVC

FgV

FAFBFC

GAGBGC

ABC2

ABABC

ABFAGAgVAAgV FBGBGvBBGvVBV BACBAGmgVgGCGBGA

CBA

50.9103kg/m3

V

F1F2F3G

F1GF2GF3GGF1F2F3V

VVV

V

abc152

F2F3VVVVV152

64.5N0.5dm3________N

V0.5 dm3FgVF4.9N

1g10N/kg0.9kg/dm30.9kg/dm3103kg/m3FG4.5N

2FgV1103kg/m310N/kg0.5103m35N

4.5N78g0.8103kg/m3A15gB12.5gC10gD8g

VVVm8g V10cm3VV10cm3 mV1g/cm310cm310gCFGGmgmV

850cm345g________g________g0.8103kg/m3

0.9g/cm3

FGmgmgmm45g

FVgVV50cm3 mV0.8g/cm350cm340g45g40gV50cm3V50 cm3

91535NA3NAA5 NB3N

C2ND8N

153

A3GAFF3GAFFF5N3N8N8NFFG8N5N3N

B10A

B

C

D

FG

AVV

154

154

FFG

gVgVVVA111551_______________________2_______________________

155

GG

FGGV

FGGVVGG

1212ABAB12ABABABFAFB85A________kg/m3B________kg/m31103kg/m3

AB

1ABAB

ABmAmB

ABVV

1

2mAmBFAFBGAGB2

ABABBA

AFAGAAgVA

BFBgVBgVB

A1103kg/m30.8103kg/m3B2A1.6103kg/m3A0.8103kg/m3B0.8103kg/m3

13ABAB120.8103kg/m3A11B85C2AD2BAB

ABABAB

ABABAB

ABABAB

mAmBABVAVBAB21

1ABABFA11A

2AB

B

3ABAB

B

4AB

AB2ABB

D

D14156a20cm30.6Nbg10Nkg

ab

156

ab

aV120cm32105m3F0.6NbV2VbF

aFGF1

FF1F2FgVV1gVV

FgVV1VgVV1

0.6N103kg/m310N/kgV2105m3

V2104m3bFgV 1.0103kg/m310N/kg2104m3 1.2Nb1.2N

151577.9103kg/m3

157

7.9103kg/m3

FGG

FFGG

FGGg Vg Vg V

VV

161582N1N20cm3g10N/kg

158

159abc

abc

159aF1

bV

c

F21 N

F1=2NF2=1NV20cm32105m3

Vb

VV

VVVV2105VV0.6103kg/m30.6103kg/m3

171510a200cm220cm500cm3

ab

1510

1b

2b2.7103kg/m3g10N/kg

500cm35104m32.7104m3

1bpF

2bpF

h

h2.5cm0.025m1

ppghh

1.0103kg/m310N/kg0.20.025m 2250Pa

FpSghSgV 1.0103kg/m310N/kg5104m3 5NFG2b

FGG VVg ShVg 1.0103kg/m30.02m20.2m2.7103kg/m35104m310N/kg 53.5Np2675Pab2250Pa5N53.5N2675Pa

18400cm210cmAABB1511aB6103kg/m30.6kgg10N/kg

ab

1511

1A

2Bb

S400cm20.04m2Aa10cm0.1mB6103kg/m2mB0.6kg1pA2p

1VB0.1103m3aABFAFBGAGBgVAVBgVAmBgVA0.1m31103m3A

A

EMBED Equation.3

A0.5103kg/m32BA

AFAGAgVAAgVAVA

0.5103m3h

0.0125mpgh1.0103kg/m310N/kg0.0125m125Pa

A0.5103kg/m3125Pa

19S1VFn

12

1

FFG1gVFgV

1

211512

1512

FFGN

NGFFFnFFmg1gVm1V1VFpS1gVnF1gVVnF1gV1gVnFm1V1m1V

201513a

ab1513

127g2.7g/m3

21513b

127g

2hFghSgVF

V10cm3mV1g/cm310cm310g10g

2115141?2?

ab1514VV

1l514a

FGg VmgV

mmV

VV

21314b

FGg VmgV

1

V

VV

12

?

221515 aAAAab1515AA

BA

CA

DAA1315b

AA

FGGAV

AAAA

VAV

A

AAA

BAAAA

VV

A

DAAFGAGV

DAAV

BD

231516AV0BCD

V1D2 Vl BCD

1516

1

2

A1517 ay11b2 V1

ab1517V1aAbA

gVgV12 V121GAg VgV0V1

g 2V1g V1g V0g3V1V0

VVV02V1V0

244.6cm0.44cm50cm20.9103kg/m3

S50cm2h14.6cmh20.44cmVVSh150cm24.6cm230 cm3h2

Vh2S0.44cm50cm222 cm3mmVVVVVVVVVV0.1V22 cm3V230 cm3220 cm310 cm3

FGGgVVg Vg V

3.2g/

3.2g/

25V11518aV2bV3c________

abc1518

mVabVV2V1

aGF

cGGF

GFFmggVVgV3V1

mgV3V1

2615194.0103kg/m3ABOOO OOA

1519

4.0103kg/m3OlOAlOBlO OlOA

OGlOAGlOB

AGFOOOO

O

GFlOAlAOGlOBlAO

G lAOF lAOGlOB GlAO

GlAOF lAOGlOAGlAOlAOGFG

EMBED Equation.3 g V

EMBED Equation.3 g Vg V

EMBED Equation.3 g V4.0103kg/m3

4103V1103V4103V4103V

21

272m0.5m54J40Ng10N/kg

h12m h20.5mW54JVVF40N

GFWGFh1h2

FGF

GF36NGFgVgV36N

gVgVVV40N

2.8103kg/m32.8103kg/m3

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