laporan praktikum fisika viskositas zat cair

8/17/2019 laporan praktikum fisika viskositas zat cair

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ACARA III

VISKOSITAS ZAT CAIR

A. PELAKSANAAN PRAKTIKUM1. Tujuan Praktikum

a. Menentukan koefiien !ikoita "kekenta#an$ %at &air 'er(aarkan )ukum Stoke. '. Mema*ami a(an+a ,eekan +an, (ie'a'kan 'en(a 'er,erak (a#am f#ui(a atau %at

&air.-. aktu Praktikum

Sa'tu/ 0 Mei -123. Tem4at Praktikum

Lantai II/ La'oraturium 5iika 6aar/ 5aku#ta Matematika (an I#mu Pen,eta*uan

A#am/ Uni!erita Mataram

7. ALAT 6AN 7A)AN1. A#at8a#at Praktikuma. 9e#a ukur 1 m# "1 'ua*$

'. 9e#a ukur - m# 'erii %at &air "- 'ua*$&. :an,ka oron, "1 'ua*$(. Nera&a ana#itik "1 'ua*$e. Pen,,ari 2 & "1 'ua*$f. Penje4it "1 'ua*$,. Pi4et tete "3 'ua*$*. Sarin,an "- 'ua*$i. Stopwatch "1 'ua*$

-. 7a*an8'a*an Praktikuma. 7o#a "1 'ua*$b. Tissue "1 ro##$&. Zat &air min+ak "- m#$(. Zat &air o#i "- m#$

C. LAN6ASAN TEORI

6. PROSE6UR PERCO7AAN1. 6i&ari ra4at maa 'o#a

a. 6iukur (iameter 'o#a e'an+ak 1 ka#i (i tem4at +an, 'er'e(a men,,unakan jan,kaoron,.

'. 6itim'an, 'o#a e'an+ak 1 ka#i men,,unakan nera&a ana#itik.&. 6i*itun, ra4at maa 'o#a/ ra4at maa rata8rata 'o#a (an ra4at maa jeni 'o#a.

-. 6i&ari ra4at maa &airana. 6itim'an, ,e#a ukur 1 m# e'an+ak 1 ka#i men,,unakan nera&a ana#itik.

'. 6imaukkan f#ui(a ke (a#am ,e#a ukur 1 m#/ kemu(ian (itim'an, ,e#a ukur +an,

'erii &airan e'an+ak 1 ka#i.&. 6i*itun, ra4at maa &airan (en,an men,uran,i maa ,e#a ukur 'erii &airan

(en,an maa ,e#a ukur.

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(. 6i*itun, ra4at maa rata8rata &airan (an maa jeni &airan.e. 6i#akukan kem'a#i 4roe(ur "a am4ai (en,an ($ (i ata untuk %at &air +an, 'er'e(a.

3. 6itentukan koefiien kekenta#an %at &air a. 6iatur jarak ejau* 3 &m men,,unakan 4en,,ari (an (i'uat tan(a 4a(a ,e#a ukur.

'. 6ijatu*kan 'o#a ke (a#am f#ui(a (an men&atat ;aktu aat 'o#a men&a4ai jarak 3 &m.&. 6iu#an,i #an,ka* "a am4ai (en,an '$ e'an+ak 1 ka#i.

(. 6itentukan koefiien kekenta#an f#ui(a.e. 6i#akukan kem'a#i 4roe(ur "a am4ai (en,an ($ (i ata untuk %at &air +an, 'er'e(a.

E. )ASIL PEN9AMATAN1. Men&ari ra4at maa 'o#a "a$

No 6iameter "m$ :ari8jari "m$ Maa ",r$

1 -/


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No m1 ",r$ m- ",r$1 >= 0 0 >


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1 1/-0< × 18-1/-0< × 18

-

- 1/-0< × 18-1/-0< × 18

-

3 1/-0< × 18-1/-0< × 18

-

> 1/-0< × 18-1/-0< × 18

-

< 1/-0< × 18-1/-0< × 18

-

2 1/-0< × 18- 1/-0<

×

1

8

-

0 1/-0< × 18-1/-0< × 18

-

? 1/-0< × 18-1/-0< × 18

-

= 1/-0< × 18-1/-0< × 18

-

1 1/-0< × 18-1/-0< × 18

-

∑ r @ 1/-0<

× 181

∑ "r 8 ṝ $-

@

∴ ṝ @∑r

n

@1,275×10-1

10 @ 1/-0<× 18- m

∴ ∆ r @ √∑(r−ṝ )2

n−1

@ √0

9 @ m

4


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:a(i jari8jari 'o#a " ṝ ± ∆ r$

• " ṝ ∆ r$ @ 1/-0< × 18- @ 1/-0< × 18- m

• " ṝ 8 ∆ r$ @ 1/-0< × 18- 8 @ 1/-0< × 18- m

'. Maa 'o#a "m$

No m "k,$ m B "k,$ m8 m B "k,$ "m8 m B $- "k,$

1 =/ =/20 × 183=/2 × 181-

< =/22 × 183=/2 × 181-

2 =/01 × 183=/2 × 181-

= =/0 × 183=/2? × 182 -3> × 181-

1 =/01 × 183=/2


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@96,52×10-3

10 @ =/2


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@63,38 × 10-6

0 @ @ kg

m3

:a(i maa jeni 'o#a " ρb ± ∆ ρb $

• " ρb ∆ ρb $ @ 111 @ 111

kg

m3

• " ρb 8 ∆ ρb $ @ 111 8 @ 111kg

m3

-. Per*itun,an ra4at maa %at &air

a. Maa jeni min+ak " ρ m$

• Maa min+ak

N

o

m1 "k,$ m- "k,$ m "k,$ m B "k,$ m8 m B "k,$ "m8 m B $- "k,$

1 >= ×

183

× 183 ?/> ×

183

322 ×

182133=0 ×

183

×

183

821> ×

182302==2 ×

181-

3 >0 ×

183

> ×

183

811> ×

1821-==2 × 18

1-

> > ×

183

02 × 18

2

> ×

183

832> ×

18213->=2 ×

181-

2 > ×

183

12 ×

18211-32 × 18

1-

0 > ×

1831-2 ×

1821


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183 183 183

∑ m @ ?1/>>

× 183

0>0?> ×

181-

∴ m @ m- 8 m1 "(itu#i +a atu atu &ari mn+a (ari 4er&o'aan 4ertama m4e

1/ tin,,a# (itu#i/ *ai#n+a u(a a(a (i ta'e# (an jan,an #u4a ertakan atuann+a$

∴ ḿ @∑m

n

@81,44×10-3

10 @ ?/1>>× 183 k,

∴

∆

m @

√

∑(m−ḿ)2

n−1

@ √747840×10-12

9 @√ 83093,33×10-12 @ -??/-< × 182 k,

:a(i maa min+ak "m B ± ∆ m$

• "m B ∆ m$ @ ?/1>> × 183 -??/-< × 182 @ ?>3-/-< × 182 k,

• "m B 8∆ m$ @ ?/1>> × 183 -??/-< × 182 @ 0?


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@8,144 ×10-3

10 × 10-6 @ ?1>/>

kg

m3

∴ ∆ ρm @∆ m

∆ v

@288,25 ×10-6

1× 10-6 @ -??/-<kg

m3

:a(i maa jeni min+ak " ρm ± ∆ ρm $

• " ρm ∆ ρm $ @ ?1>/> -??/-< @ 11-/2<kg

m3

• " ρm 8 ∆ ρm $ @ ?1>/> 8 -??/-< @


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183 183 183 182

1 >= ×

181-

∴ m @ m- 8 m1 "(itu#i +a atu atu &ari mn+a (ari 4er&o'aan 4ertama m4e

1/ tin,,a# (itu#i/ *ai#n+a u(a a(a (i ta'e# (an jan,an #u4a ertakan atuann+a$

∴ ḿ @∑m

n

@80,41×10-3

10 @ ?/>1 × 183 k,

∴ ∆ m @ √∑(m−ḿ)2

n−1

@ √274090×10-12

9 @√ 30454,44 ×10-12 @ 10>/1 × 183 10>/


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∴ ρo @ḿ

v

@8,041×10-3

10 ×10-6 @ ?>/1kg

m3

∴ ∆ ρo @∆ m

∆ v

@174,51 ×10-6

1 × 10-6 @ 10>//1 10>/ m

• " 8 ∆ $ @ /3 8 /1 @ /- m

aktu tem4u* 'o#a "t$

No t "$ "$ ṯ t 8 "$ ṯ "t 8 $ ṯ - "$-

1 1/ 1/3= 8 /3= /1


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= 1/< 1/3= /11 /1-11 1/1 1/3= /21 /30-1

∑ t @ 1/3= ∑ "t 8 $ ṯ - @

/ ≈ =/1- × 18>

@ =/1- ×

183

Nm8-

@ =/1- ×

183

Pa

@ =/1- × 18- 4oie

'. O#i:arak tem4u* "$

∴ @ 3 &m @ /3 m

12


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∴ ∆ @1

2 ka#a terke&i#

@1

2 . /- @ /1 m

:a(i jarak " ± ∆ s $

• " ∆ $ @ /3 /1 @ /> m

• " 8 ∆ $ @ /3 8 /1 @ /- m

aktu tem4u* 'o#a "t$

No t "$ "$ ṯ t 8 "$ ṯ "t 8 $ ṯ - "$-

1 1/= 1/>3< />2< /-12--3< /12< /-0--<3 1/-2 1/>3< 8 /10< /32-<> 1/30 1/>3< 8 /2< />--<< 1/1? 1/>3< 8 /-3< 8 /13< /1?--<

1 1/31 1/>3< 8 /1-< /1/3< ∑

"t 8 $ ṯ -

@/>1>2<

∴ @ ṯ ∑ t

n

@14,35

10 @ 1/>3<

∴ ∆ t @

√

∑(t − ṯ )2

n−1

@ √0,41465

9 @√ 0,0460722222 @ /-1>2>>>?0 ≈ /-1<

:a(i ;aktu " ṯ ∆ t $

• "t ∆ t$ @ 1/>3< /-1< @ 1/2<

• "t 8 ∆ t$ @ 1/>3< 8 /-1< @ 1/--

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Koefiien kekenta#an " η $

∴ η @2 ṝ 2 g ṯ ( ρb− ρo)

9s

@2(1,275× 10-2)2 ×9,8 ×1,435(1110−978,61)

9 ×0,3

@ --->/=? × 18> ≈ ---< × 18>

@ ---/< × 183 Nm8- @ ---/< × 183 Pa

@ ---/< × 18- 4oie

9. PEM7A)ASAN). PENUTUP

6A5TAR PUSTAKA

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