The Current

September 6, 2022 | Author: Anonymous | Category: N/A
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\co Murrogt J Murrogt ( B ) ef ohomtrbmbty oxbsts bg j ro`beg wcog j got ohomtrbm mcjr`o bs trjgspertol fred ego pebgt te jgetcor bg tcjt ro`beg. ]uppeso tco mcjr`o bs devbg` tcreu`c j wbro. Bf j mcjr`o q bs trjgspertol bg j `bvog mress someg ef tco wbro bg j do t, tcog tco murrogt tcreu`c tco wbro bs

 B 4

q t 

Coro, q bs bg meuhedis, t bs bg somegls, jgl B bs bg jdporos (: J 4 : M/s). iy musted tco lbromeg ef tco murrogt bs tjaog te io bg tco lbromeg ef ew ef pesbvo mcjr`o. tcus, j ew ef ohomtregs te tco rb`ct merrospegls te j murrogt te tco ho. J  ijttory bs j seurmo ef ohomtrbmjh ogor`y. o gor`y. Bf ge bgtorgjh ogor`y hessos emmur bg tco ijory, tcog tco petogjh lborogmo iotwoog bts tordbgjhs bs mjhhol tco ohomtredevo fermo (odf) ef tco ijory. _ghoss etcorwbso stjtol, bt wbhh io jssudol tcjt tco tordbgjh petogjh lborogmo ef j ijory bs oqujh te bts odf. \co ugbt fer odf bs tco sjdo fer tco petogjh lborogmo, tco veht.

\co Yosbstjgmo jgl Ecd‒s Hjw \co ohomtrbmjh rosbstjgmo ef j mbrmubt medpegogt er lovbmo bs logol js tco rje ef tco vehtj`o jpphbol te tco ohomtrbm murrogt wcbmc ews tcreu`c bt.

 Y 4

V   B 

Bf tco rosbstjgmo bs megstjgt evor j megsblorjiho rjg`o ef vehtj`o, Ecd‒s Hjw,  B 4V   // Y , mjg io usol te prolbmt tco iocjvber ef j djtorbjh. Jhtceu`c tco logbeg jievo bgvehvos LM murrogt jgl vehtj`o, tco sjdo logbeg cehls fer JM jpphbmjeg ef rosbsters. Pcotcor er get j djtorbjh eioys Ecd‒s Hjw, bts rosbstjgmo mjg io losmrbiol bg tords ef bts iuha rosbsvbty. \co rosbsvbty, jgl tcus tco rosbstjgmo, bs todporjturo lopoglogt. Evor sbzjiho rjg`os ef todporjturo, tcbs todporjturo lopoglogmo mjg io prolbmtol fred j todporjturo meombogt ef rosbstjgmo.   \co Yosbsvbty \co ohomtrbmjh rosbstjgmo ef tco wbro weuhl io oxpomtol ox pomtol te io `rojtor fer j heg`or wbro, hoss fer j wbro ef hjr`or mress somegjh jroj, jgl weuhl io oxpomtol te t e lopogl upeg tco djtorbjh eut ef wcbmc tco wbro bs djlo. Oxporbdogtjhhy, tco lopoglogmo upeg tcoso preporos bs strjb`cerwjrl ego fer j wblo rjg`o ef meglbegs, jgl tco rosbstjgmo ef tco wbro mjg io oxprossol js

 ϊh  Y 4  J \co fjmter bg tco rosbstjgmo wcbmc tjaos bgte jmmeugt tco gjturo ef tco djtorbjh bs tco rosbsvbty. Jhtceu`c bt bs todporjturo lopoglogt, bt mjg io usol jt j `bvog todporjturo te mjhmuhjto tco rosbstjgmo ef tco wbro ef `bvog `oedotry.

:

 

\co bgvorso ef rosbsvbty bs mjhhol meglumvbty. \coro jro megtoxts wcoro tco uso ef meglumvbty bs dero megvogbogt.

 Ohomtrbmjh meglumtbvbty 4 ύ 4

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Yosbstjgmo Vjrbos Pbtc \odporjturo Bf j meglumter cjs j rosbstjgmo  Ye  jt j todporjturo \ e, tcog tco rosbstjgmo  Y  jt j todporjturo \  bs

 Y 4 Y e + κ Y e ( \ ∙\ e ) wcoro κ  bs  bs tco todporjturo meombogt ef tco djtorbjh ef j meglumter. _sujhhy κ  vjrbos  vjrbos wbtc todporjturo, jgl se tcbs rohjeg bs jpphbmjiho eghy evor j sdjhh todporjturo rjg`o.

Mbrmuhjr Dbh Bg og`bgoorbg` prjmmo tco ugbt ef jroj ef j reugl meglumter bs eog tco mbrmuhjr dbh ∣mdbh. \co dbh bs j ugbt ef hog`tc oqujh te >.>>: bg., wcbmc bs

: :>>>

 bg. J mbrmuhjr dbh bs j ugbt ef jroj te tco jroj ef j mbrmho

wceso lbjdotor bs : dbh. \co jroj  Jmd bg mbrmuhjr dbhs ef j mbrmho wceso lbjdotor bg dbhs bs  Ld bs oqujh te 9

 Ld; 9

 Jmd 4 Ld

 

\co jlvjgtj`o ef usbg` tco mbrmuhjr dbh js j ugbt ef jroj bs tcjt bt jvebls duhphbmjeg jgl lbvbsbeg iy ώ . Pcog tco hog`tc ef tco meglumter bs `bvog iy foot jgl bts jroj bg mbrmuhjr dbhs, tco ugbt ef rosbsvbty bs tco ecd ∙ mdb mdbhh por feet  feet .

   

L 4 : dbh

J 4: mdbh

]jdpho preihod :   J wbro mjrrbos j murrogt ef : J. Cew djgy ohomtregs pjss jgy pebgt bg tco wbro ojmc somegl5

ge . ef ohomtr ohomtregs 4

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9 ]jdpho preihod 9   J :9>-V tejstor cjs j rosbstjgmo ef :9 . Pcjt dust io tco dbgbdud rjg` ef tco fuso bg tco ohomtrbm mbrmubt te wcbmc tco tejstor bs meggomtol5

 B 4

µ

V   Y

 :9> V  :9 ΢

µ :> J

]jdpho preihod =   J :9>-V ohomtrbm cojtor lrjws j murrogt ef 9? J. Pcjt bs bts rosbstjgmo5

 Y 4

V   B 

Jgs. -d hog`tc ef j mortjbg wbro cjs j rosbstjgmo ef :? . Pcjt hog`tc ef tcbs wbro weuhl cjvo j rosbstjgmo ef 3 5

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 Y :  Y9  Y9 h 94 h :  Y:

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µ :>.60 d ]jdpho preihod ? Pcjt bs tco rosbstjgmo ef j meppor wbro >.? dd bg lbjdotor jgl 9> d heg`5 \co rosbsvbty ef meppor bs :.0 x :>∙3 ΢ • d.

 ϊh  Y 4  J

 (:.0 Ð :>∙ ΢ • d . )( 9> d) µ ∙ ώ   (( >.? Ð :> d ) 3

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= ]jdpho preihod 6   J phjgud wbro 3> md heg` bs te cjvo j rosbstjgmo ef >.: . Pcjt sceuhl bts lbjdotor io5 \co rosbsvbty ef phjgud bs :.: x :>∙0 ΢ • d .

 ϊh  Y 4  J  ϊh  J 4  Y 9  l  ϊh ώ  4 <  Y l4



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]jdpho preihod 0   J meppor wbro cjs j rosbstjgmo ef :>.>  jt 9>ℍM . (j) Pcjt wbhh bbts ts rosbstjgmo io jt 3> ℍM 5 (i) Jt > ℍM 5 \co todporjturo meombogt ef rosbstjgmo ef meppor bs >.>>< / ℍM . j)   Y 4 Y e + κ Y e ( \ ∙\ e ) jgs. :9.<  i)   Y 4 Y e + κ Y e ( \ ∙\ e )  jgs. 2.9 

]jdpho preihod 3   J rosbstjgmo ef tco vjrbjeg tco rosbstjgmo ef jbs meglumter wbtc todporjturo. Bf tcotcordedotor rosbstjgmo efdjaos sumc juso tcordedotor wbtc jefphjgud ohodogt ?  jt 9> ℍM   jgl 2    jgl wcog bt bs bgsortol bg j furgjmo, Fbgl tco todporjturo ef tco furgjmo. \co vjhuo ef κ  fer  fer j phjgud bs >.>>=6/ℍM .

∆ Y 4 Y> κ ∆ \  Jgs. 9.< •mdbh/. Fbgl tco rosbstjgmo ef :?>>  ef meppor wbro wceso lbjdotor bs >.>3> bg.

 ϊh  Y 4  J

 

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 mdbh   )( :?>> ft ) ft 

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< ]jdpho preihod :>   \co spombm rosbstjgmo ef Gbmcredo bs 6>> •mdbh/. Cew heg` sceuhl j Gbmcredo wbro 9> dbhs bg lbjdotor io fer bt te cjvo j rosbstjgmo ef ? 5 Jgs. =.== ft 

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