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如图所示为某静电场中x轴上各点电势φ的分布图,一个带电粒子在坐标原点O由静止释放,仅在静电力作用下沿x轴正方向运动,则( )
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高三下学期物理《》真题及答案
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如图所示虚线是两个等量点电荷所产生的静电场中的一簇等势线若不计重力的带电粒子从a点射入电场后恰能沿图
由a到b的过程中电场力对带电粒子做正功
由a到b的过程中带电粒子的电势能在不断减小
若粒子带正电,两等量点电荷均带正电
若粒子带负电,a点电势高于b点电势
如图所示虚线表示静电场中的一簇等差等势线实线表示带电粒子只在电场力作用下的运动轨迹ab为其运动轨迹上
粒子一定带正电荷
粒子在a点的加速度小于在b点的加速度
粒子在a点的速度小于在b点的速度
粒子在a点的电势能大于在b点的电势能
如图所示
B.C.为等量异种电荷产生的静电场中的三个等势面,已知三个等势面的电势关系为φ
A.
<φ
B
<φ
C
.一带电粒子进入此静电场后,沿实线轨迹运动,依次与三个等势面交于a、b、c、d、e五点.不计粒子重力,下列说法中正确的是.A.粒子的a点的电势能小于d点的电势能.
粒子在ab段速率逐渐增大
粒子在a点的速率大于在e点的速率
该带电粒子带负电
如图所示图中K.L.M.为静电场中的3个相距较近的等势面.一带电粒子射入此静电场中后只在电场力的作用
粒子带负电
粒子在a点的加速度大于在b点的加速度
粒子在a点与e点的速度大小相等
粒子在a点的电势能大于在d点的电势能
空间存在某静电场在x轴上各点的场强E随坐标x的分布规律如图所示规定x轴的正方向为电场强度E的正方向.
该粒子一定带负电
该粒子在x=0点两侧分别做匀变速直线运动
x=x
0
处的电势为
若该粒子带电量的绝对值为q,则粒子运动区间为
2016年·安康三模空间存在着平行于x轴方向的静电场PMONQ为x轴上的点PQ之间各点的电势φ随位置
粒子一定带负电
P点的电势低于M点的电势
M点的电场强度小于N点的电场强度
粒子从M点向N点运动的过程中,电势能一直减小
空间存在着电场强度方向平行于x轴的静电场
M.、O.、N.、
为x轴上的点,OA<OB,OM=ON,AB间的电势j 随x的分布为如图所示的折线,一个带电粒子在电场中仅在电场力作用下从M.点由静止开始沿x轴向右运动,则下列判断中正确的是 A.粒子一定能通过N.点 B.粒子一定带正电
AO间的电场强度大于OB间的电场强度
粒子从M.向O.运动过程所受电场力均匀增大
如图所示虚线是两个等量点电荷所产生的静电场中的一簇等势线一不计重力的带电粒子从a点射入电场后沿图中的
由a到b的过程中电场力对带电粒子做正功
由a到b的过程中带电粒子的动能减小
若粒子带正电,两等量点电荷均带正电
若粒子带负电,a点电势高于b点电势
空间存在着电场强度方向平行于x轴的静电场
M.、O.、N.、
为x轴上的点, OA<OB,OM=ON,AB间的电势j 随x的分布为如图所示的折线,一个带电粒子在电场中仅在电场力作用下从M.点由静止开始沿x轴向右运动,则下列判断中正确的是
A.粒子一定能通过N.点 B.粒子一定带正电
AO间的电场强度大于OB间的电场强度
粒子从M.向O.运动过程所受电场力均匀增大
如图2所示
B.C.为等量异种电荷产生的静电场中的三个等势面,已知三个等势面的电势关系为φA<φB<φC.。一带电粒子进入此静电场后,沿实线轨迹运动,依次通过a、b、c、d、e五点。不计粒子重力,下列说法中正确的是( ) A.该带电粒子带正电
粒子在ab段速率逐渐增大
粒子在a点的速率等于在e点的速率
a点的场强与e点的场强相同
某静电场中的电场线分布如图所示方向未知带电粒子在该电场中仅受静电力作用其运动轨迹如图中虚线所示由M.
粒子必定带正电荷
该静电场一定是孤立正电荷产生的
粒子在M.点的加速度小于它在N.点的加速度
粒子在M.点的速度大于它在N.点的速度
某静电场中的电场线方向不确定分布如图所示带电粒子在电场中仅受静电力作用其运动轨迹如图中虚线所示由M.
粒子必定带正电荷
该静电场一定是孤立正电荷产生的
粒子在M.点的加速度小于它在N.点的加速度
粒子在M.点的速度大于它在N.点的速度
如图所示图中K.L.M.为静电场中的3个相距较近的等势面.一带电粒子射入此静电场中后只在电场力的作用
粒子带负电
粒子在a点的速度小于在b点的速度
粒子在a点与e点的速度大小相等
粒子在a点的电势能大于在d点的电势能
某静电场中的电场线方向不确定分布如图所示带电粒子在电场中仅受静电力作用其运动轨迹如图中虚线所示由M.
粒子必定带正电荷
该静电场一定是孤立正电荷产生的
粒子在M.点的加速度小于它在N.点的加速度
粒子在M.点的速度大于它在N.点的速度
2016年·海口一模空间存在着平行于x轴方向的静电场PMONQ为x轴上的点PQ之间各点的电势φ随位置
粒子一定带负电
P点的电势低于M点的电势
M点的电场强度小于N点的电场强度
粒子从M点向N点运动的过程中,电势能一直减小
如图所示
B.C.为等量异种电荷产生的静电场中的三个等势面,已知三个等势面的电势关系为φ
A.
<φ
<φ
。一带电粒子进入此静电场后,沿实线轨迹运动,依次与三个等势面交于a、b、c、d、f五点。不计粒子重力,下列说法中正确的是
A.该带电粒子带负电B.粒子在ab段速率逐渐增大C.粒子在a点的速率大于在e点的速率
a点的场强大小小于b点的场强大小
如图所示虚线是某一静电场中的一簇等势线若不计重力的带电粒子从a点射入电场后恰能沿图中的实线运动b点是
)带电粒子一定带正电 (
)b点的场强一定大于a点 (
)b点的电势一定高于a点 (
)带电粒子在b点的速率一定小于在a点的速率
如图所示虚线是用实验方法描绘出的某一静电场中的一簇等势线.若不计重力的带电粒子从a点射入电场后恰能沿
带电粒子在b点的速率一定小于在a点的速率
带电粒子一定带正电
b点的电势一定高于a点的电势
b点的电场强度一定大于a点的电场强度
在如图所示的静电场中实线为电场线一带电粒子仅在电场力作用下沿图中虚线从
运动到
,则该带电粒子的 A.加速度增大 B.所受电场力做负功
速度增大
电势能减小
如图所示点电荷的静电场中电场线用实线表示但其方向未标明虚线是某一带正电的粒子通过该电场区域时的运动轨
可以判断a 、b两点电场强度方向
可以确定带电粒子在a、b两点处的受力方向
a点的电势能比b点的电势能大
带电粒子在b点的速度较大
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ZhengayoungwomanfromChinawhoisteachingChinesetostudentsinLawtonOklahomawasexplainingavocabularyquizonareportmorning.Thenastudent1. SorryIwasn'tlisteningsaidthegirlwhatarewe2tobedoing? Zhengseemedshockedbut3repeatedtheinstructions.HoweverinChinaifsheteachesthestudentsandtheydon't4itthat'stheirproblemHereiftheydon'tunderstandsheteachesit5. Sheusedtoteach6atauniversitybackhomeHere7leadmoreinterestinglivessheinvolved8insportsandother9.InaninterviewseveralotherChineseteacherssaidtheyhadsome10gettingusedtotheAmericanschoolsafterworkinginacountrywherestudentsbecome11whenateacherenterstheroom. Stillshebelievedthatteachersgotlittle12inAmerica.Thiscountrydoesn'tvalueteachersandthat13meshesaidTeachersdon'tearnmuchandthiscountrylovesmakimg14.InChinateachersdon'tearnaloteitherbutit'savery15career. Shespenttime16Americans'wrongideaaboutChina.Somestudentswere17tolearnthatChinesepeopleusedcellphones.Sheishopingtodoher18byteachingthemmorethanhowto19characters.IwantmystudentstohaveasweetsweetamemoryoflearningChinese.Iwantthemtorememberthe20ofthelanguageandtheculture. 1.A.scolded B.apologized C.exploded D.interrupted 2.A.suggested B.organized C.supposed D.reminded 3.A.patiently B.shortly C.properly D.slightly 4.A.recognize B.get C.notice D.guess 5.A.again B.soon C.then D.anyhow 6.A.department B.advantage C.culture D.quality 7.A.headmaster B.students C.parents D.players 8.A.luckily B.partly C.strangely D.equally 9.A.experiences B.games C.celebrations D.activities 10.A.reasons B.interest C.fun D.difficulties 11.A.tired B.quiet C.normal D.helpful 12.A.manner B.excitement C.respect D.belief 13.A.touches B.pleases C.bothers D.wonders 14.A.money B.changes C.sense D.attempts 15.A.academic B.successful C.precious D.honorable 16.A.sufferingfrom B.clearingup C.watchingover D.settlingdown 17.A.astonished B.detmnmed C.unexpected D.disturbed 18.A.good B.bit C.favor D.service 19.A.build B.improve C.write D.develop 20.A.beauty B.strength C.wisdom D.value
ROYAL皇家SHAKESPEARETHEATRE SHAKESPEAREWORKSHOPS Developyourstudent'sconfidenceunderstandingandenjoymentofShakespearebyworkingalongsideRSCRoyalShakespeareCompanyartiststoincreaseknowledgeofcharactersplotIanguageandkeythemesofanyShakespeareplayofyourchoiceSuitableforKSI﹣undergraduatestudentswithorwithoutpriorknowledgeofthetext.AvailableMon﹣FrithroughoutUKtermtime.Max30students. HALFDAYWORKSHOPS10AM﹣12NOON1﹣3PMOR4﹣6PM. COST£205£185RSCEDUCATIONMEMBERS FULLDAYWORKSHOPS10AM﹣330PMOR1﹣6PM COST£350£325RSCEDUCATIONMEMBERS REGULARSHOWS TICKETPRICES *Restricted受限的viewseats. PUBLICUNDERSTUDY候补演员PERFORMANCES Seethestarsoftomorrowperformingtoday.Werunafullunderstudycompanyforallofourproductions.Throughouttheyeartheunderstudyperformancesforselectedproductionswillbeopentothepublic.Thesefullscaleperformancesgiveaudiencesthechancetoseetheleadingactorsofthefuture. TICKETPRICES£5£2.50RSCMembers TheWinter'sTaleTue12Feb ALifeofGalileoTue26Feb AsYouLikeItTue7May HamletThu16May 1.IfateacherwantsherKST﹣undergraduatestoattendaShakespeareworkshopshe. A.cangotothethetheatreonSaturdays B.hastoaskthemtoreadShakespeare C.canarrangetodoitinevening D.hastopaynolessthan£185 2.HowmuchdoyouhavetopaytogetthebestviewoftheplayonTuesdayeveninginthetheatre? A.£18 B.£28 C.£39 D.£50 3.WhencanyouseetheunderstudyperformanceofHamler? A.Tue12Feb B.Tue26Feb C.Tue7May D.Thu16May
BoatrightaWindermereresidentwhojustwentthroughmidtermsatBishopMooreHighSchoolwasfacedwithalife﹣or﹣deathsituationonaJunetripwithhisfellowScouts童子军upasteepNewMexicomountain.OneoftheirleadersRicCooperfelldownwithoutwarningsome11000feet.AccordingtoBoatrighttheboysknewitwasbadwhenCooper'seyesrolledbackintohishead. InsteadofstandingaroundhopingforthebestIdecidedtotakeoffrunningBoatrightsaid.HeandthreeotherScoutsbeganaspeedyanddangerousfour﹣milerunningdownthemountainwhiletheremainingScoutsandtroopleadersstayedwithCoopertoperformCPR心脏复苏术andbuildshelterItwasaroundlP.mbythistimeandthetemperaturewasreachingitspeakCooperhadsufferedfromaheartattack. BoatringhtandtheothersusedtheskillstheyhadlearnedasScoutstosuccessfullyclimbdownthepathtoBeaubienoneofthelargeststaffcampsatphilmontScoutRanch.TheytoldthepeopleabouttheincidentandarescuehelicopterwasimmediatelysenttomoveCoopertoaplaceofsafetyTheirmissionovertheboysdrankwaterandtriedtostaycalm. Itbeganhittingusthatwemayhaveseenthisguy'slastbreathsonearthBoatrightremembersthinking.WhenofficialsarrivedtotellthemaboutCooper'sconditiontheyaskedtheboystostepoutsideBoatrightandhisfellowScoutswereafraidthatmeantbadnews.Theysaid'Wellhe'sOK'Andthepausebetween'well'and‘OK'wasprobablythelongestmomentyoucouldeverfeel. TheScoutswhoaidedinsavingCooper'slifereceivedtheHonorMedalwhichhasonlybeengiventoalittlemorethan2000Scoutsinnearly100years.BoatrighthasalsobecmeaLifeScoutwhichisthesecond﹣highestrankHeisgratefulforalltheawardsbutmostlyheishumbled谦逊. HismotherEileenBennettishappyhersonheldontohisScouttrainingeveninsuchastressfulsituationSomanyScoutswillgothroughtheirentireScoutlifeandnevercomeacrossanythinglikethisImnothappythatthishappenedbutI'mjustsoproudthattheyhandleditthewaytheydidandmanagedtostayhumbleBennettsaid. 1.Whathappenedatthebeginningofthestory? A.Cooperfelldownthemountain. B.Boatrightwasawardedatschool. C.Cooperwasn'twarnedofthedanger. D.Boatright'seyesrolledbackintohishead. 2.WhatseemedtobethebestactiontotakebytheScouts? A.Seekinghelpfromthestaffcamp. B.Keepingthetemperaturedown. C.Havingagroupleadermeeting. D.Bringthesickdownthemountain. 4.HowdoesEileenBennettthinkoftheevent? A.ItrarelyhappenstoboyScouts. B.Ittaughttheboystobehumble. C.Itwasagoodtrainingexperience. D.Itprovedherson'sfriendsarethebest.
Thistimehehaskeptallthepromisehemade.Idon'treallytrusthim. A.Evenso B.Inshort C.Ifpossible D.Onceagain
NowanyonecanpretendtobeSpider﹣Manbysimplywearingasuitthatletsyoufeelhowcloseyouaretoanearbyobject.Itcanevenletthewearercontrolwiththeireyesclosed. ThesuitcalledSpiderSenseandbuiltbyVictorMateevitsioftheUniversityofIllinoisinChicagohassmallrobotic机器人的armswithmicrophonesthatsendoutandpickupultrasonicreflections超声波反射fromobjects.WhentheultrasoundfindssomeonemovingclosertothemicrophoneitknowsSevenarmsareequippedacrossthesuittogivethewearerasnearto360degreeultrasoundcoverageaspossible. WhensomeoneishittingSpider﹣Manhefeelsitandcanavoidit.OursuitisthesameideasaysMateevitsi.SpiderSensecouldhelpblindpeopletofindtheirwaymoreeasily.Mateevitsitestedthesuitoutonstudentsgettingthemtostandoutsideoncampuseyescoveredandfeelforattackersgettingclose.EachwearerhadninjacardboardthrowingstarstousewhenevertheysensedsomeonegettingcloseNinetyfivepercentofthetimetheywereabletosensesomeonecomingnearandthrowthestaratthemsaysMateevitsi. I'mveryexcitedaboutthissaysGershonDublonoftheMassachusettsInstituteofTechnologywhoalsoworksonotherpartsofthehumanbody.Mateevitsi'sworkisastepontheroadtogivinghumanstrulyintegratedextrasensoryperception超感知. Mateevitsiwantstousethesuitofjustafewsensorsonthearmsandbacktoincreasecyclists'awarenessofothertrafficontheroad.SpiderSenseisduetobepresentedataninternationalconferenceinGermanythisyear.TheteamnowplanstoaddmoresensorstothesuittoincreaseitsresolutionTheteamalsoplanstobeginexperimentsonSpiderSeneswithblindpeople. Wehumanshavethesensesthatwearebornwithandwecan'textendthemMateevitsisays.Buttherearesomethreatswhichareverydeadlybutwecan'tsensethemlikeradiaton辐射Electronicsensorscanfeelthosethreats. 1.HowcanSpiderSensehelpusinourdailylife? A.Make360degreeturns. B.Fightbackwhenattacked. C.Warnitswearerofacomingdanger. D.Sendoutandreceivetextmessages. 2.WhatcanweinferfromMateevitsi'stestofSpiderSense? A.Itisofgreatfun B.Itworkswell. C.Itreactstoblindpeople. D.Itiswelcomeoncaucus. 3.WhatcanwelearnaboutSpiderSensenow? A.Ithelpscyclistsontheroad. B.ItisstillaSpider﹣Manidea. C.Itisatthedevelopmentalstage. D.Itssensorssendoutradiation. 4.Whattypeoftextisthispassage? A.Asciencereport. B.Afilmreview. C.Amedicalrecord. D.Afairytale.
ShenyisateacherinCaithness.isalmostasfarnorthasyoucango. A.That B.Where C.Which D.What
Hetriedhardtojointhearmybutwasbecauseofpoorhealth. A.turneddown B.goneout C.keptaway D.takenin
OurdecisiontobuildthemuseuminHartlepoolwasbasedonthethattherewerenonationalmuseumsintheNorthEast A.feet B.goal C.thing D.belief
一个四棱锥的直观图和三视图如图所示 1求证面PBD⊥面ABCD 2求三棱锥A﹣PDC的体积 3试在PB上求点M使得CM∥平面PDA.
FiveyearsagowhenItaughtartataschoolinSeattleIusedTinkertoysasatestatthebeginningofatermtofindoutsomethingaboutmystudents.IputasmallsetofTinkertoysinfrontofeachstudentandsaidMakesomethingoutoftheTinkertoys.Youhave45minutestoday﹣and45minuteseachdayfortherestoftheweek. Afewstudentshesitatedtostart.Theywaitedtoseetherestoftheclasswoulddo.Severalotherscheckedtheinstructionsandmadesomethingaccordingtooneofthemodelplansprovided.Anothergroupbuiltsomethingoutoftheirownimaginations. OnceIhadaboywhoworkedexperimentallywithTinkertoysinhisfreetime.Hisconstructionsfilledashelfintheartclassroomandagoodpartofhisbedroomathome.Iwasdelightedatthepresenceofsuchastudent.Herewasanexceptionallycreativemindatwork.HispresencemeantthatIhadanunexpectedteachingassistantinclasswhosecreativitywouldinfect感染otherstudents. Encouragingthiskindofthinkinghasadownside.Irantheriskoflosingthosestudentswhohadadifferentstyleofthinking.WithoutfailonewoulddeclareButI'mjustnotcreative. Doyoudreamatnightwhenyou'reasleep? Ohsure. Sotellmeoneofyourmostinterestingdreams.Thestudentwouldtellsomethingwildlyimaginative.Flyingintheskyorinatimemachineorgrowingthreeheads.That'sprettycreative.Whodoesthatforyou? Nobody.Idoit. Really﹣atnightwhenyou'reasleep? Sure. Trydoingitinthedaytimeinclassokay? 25.TheteacherusedTinkertoysinclassinorderto? A.knowmoreaboutthestudents B.makethelessonsmoreexciting C.raisethestudents'interestinart D.teachthestudentsabouttoydesign 26.WhatdoweknowabouttheboymentionedinParagraph3? A.Helikedtohelphisteacher. B.Hepreferredtostudyalone. C.Hewasactiveinclass. D.Hewasimaginative. 27.WhatdoestheunderlinedworddownsideinParagraph4probablymean? A.Mistake. B.Drawback. C.Difficulty. D.Burden. 28.Whydidtheteacheraskthestudentstotalkabouttheirdreams? A.Tohelpthemtoseetheircreativity. B.Tofindoutabouttheirsleepinghabits. C.Tohelpthemtoimprovetheirmemory. D.Tofindoutabouttheirwaysofthinking.
AnewcollectionofphotosbringsanunsuccessfulAntarcticvoyagebacktolife. FrankHurley'spictureswouldbeoutstanding﹣﹣﹣﹣undoubtedlyfirst﹣ratephoto﹣journalism﹣﹣﹣iftheyhadbeenmadelastweek.Infacttheywereshotfrom1914through1916mostofthemafteradisastrousshipwreck海难byacameramanwhohadnoreasonableexpectationofsurvival.Manyoftheimageswerestoredinanicechestunderfreezingwaterinthedamagedwoodenship. TheshipwastheEnduranceasmalltightNorwegian﹣builtthree﹣masterthatwasintendedtotakeSirErnestShackletonandasmallcrewofseamenandscientists27meninalltothesouthernmostshoreofAntarctica'sWeddellSea.FromthatpointShackletonwantedtoforceapassagebydogsled雪橇acrossthecontinent.ThejourneywasintendedtoachievemorethanwhatCaptainRobertFalconScotthaddone.CaptainScotthadreachedtheSouthPoleearlyin1912buthaddiedwithhisfourcompanionsonthemarchback. AswriterCarolineAlexandermakesclearinherforcefulandwell﹣researchedstoryTheEnduranceadventuringwaseventhenathoroughlycommercialeffort.Scott'slastjourneycompletedasbelayinatentdyingofcoldandhungercaughttheworld'simaginationandafilmmadeinhishonordrewcrowds.ShackletonaonetimeBritishmerchant﹣navyofficerwhohadgottowithin100milesoftheSouthPolein1908startedabusinessbeforehis1914voyagetomakemoneyfrommovieandstillphotography.FrankHurleyaconfidentandgiftedAustralianphotographerwhoknewtheAntarcticwashiredtomaketheimagesmostofwhichhaveneverbeforebeenpublished. 33.WhatdoweknowaboutthephotostakenbyHurley? A.Theyweremadelastweek B.Theyshowedunderseasceneries C.Theywerefoundbyacameraman D.Theyrecordedadisastrousadventure 34.WhoreachedtheSouthPolefirstaccordingtothetext? A.FrankHurley B.ErnestShackleton C.RobertFalconScott D.CarolineAlexander 35.WhatdoesAlexanderthinkwasthepurposeofthe1914voyage? A.Artisticcreation B.Scientificresearch C.Moneymaking D.Treasurehunting.
幂函数gx=m2﹣m﹣1xm的图象关于y轴对称. 1求gx的解析式 2若函数fx=gx﹣2ax+1在x∈[﹣12]上单调递增求a的取值范围.
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