密度基礎(chǔ)計(jì)算題分類練習(xí)

1、密度基礎(chǔ)計(jì)算題分類練習(xí)一、 同體積問題1、一個(gè)容積為2、5升的塑料壺，用它裝酒精，最多能裝多少克？2、一個(gè)瓶子能盛1千克水，用這個(gè)瓶子能盛多少千克酒精？3、有一只玻璃瓶，它的質(zhì)量為，當(dāng)瓶?jī)?nèi)裝滿水時(shí)，瓶和水的總質(zhì)量為，用此瓶裝另一種液體，瓶和液體的質(zhì)量為，求這種液體的密度。4. 把一塊金屬放入盛滿酒精（酒精=0.8g/cm3）的杯中時(shí)，從杯中溢出8g酒精。若將該金屬塊放入盛滿水的杯中時(shí)，從杯中溢出水的質(zhì)量是多少？5鑄造車間澆鑄合金工件，已知所用木模質(zhì)量為500 g，木料密度為07×103 kg/m3今稱得每個(gè)合金工件的質(zhì)量為49 kg，則該合金的密度是多少？6假設(shè)鋼瓶?jī)?nèi)儲(chǔ)滿9千克液化氣

2、，鋼瓶容積為0。3m 3,今用去一半，則鋼瓶?jī)?nèi)剩下的液化氣密度為多少7、某銅制機(jī)件的質(zhì)量為千克，如改用鋁制品質(zhì)量可減輕多少？8、如圖3所示，一只容積為3×10-4m3的瓶?jī)?nèi)盛有0.2kg的水，一只口渴的烏鴉每次將一塊質(zhì)量為0.01kg的小石塊投入瓶中，當(dāng)烏鴉投入了25塊相同的小石塊后，水面升到瓶口。求：（1）瓶?jī)?nèi)石塊的總體積；（2）石塊的密度。9、一個(gè)容器盛滿水總質(zhì)量為450g，若將150g小石子投入容器中，溢出水后再稱量，其總質(zhì)量為550g,求：（1） 小石子的體積為多大？（2） 小石子的密度為多少？10、一空杯裝滿水的總質(zhì)量為500克，把一小物塊放入水中，水溢出后，杯的總質(zhì)量為8

3、00克，最后把物塊取出后，杯的總質(zhì)量為200克，求此物塊的密度是多少？11某同學(xué)沒有利用量筒也測(cè)出了一滿杯牛奶的密度.他的方法是這樣的：先用天平測(cè)出一滿杯牛奶的總質(zhì)量是120 g，然后測(cè)得空杯子的質(zhì)量是50 g，最后他將該杯裝滿水，又用天平測(cè)得水和杯子的總質(zhì)量是100 g.請(qǐng)你幫該同學(xué)算一算此杯牛奶的密度是多少？二、同質(zhì)量問題1、體積為1 m3的冰化成水的體積多大？(冰=0.9×10³kg/m³2、體積為9 m3³的水化成冰的體積多大？3、鄭小胖家的一只瓶子，買新目標(biāo)英語(yǔ)八年級(jí)（上）期末復(fù)習(xí)選擇題專項(xiàng)（一）( 1. _ do you write to y

4、our pen friend? Once a week.酒剛好裝滿 ( 3. _ does a car cost（花費(fèi)）in China?It can cost as a little 50,000 yuan and as much as 300,000 yuan.A. How many B. How price C. How money D. How much( 4. Pass my glasses to me, I can _ read the words in the newspaper.A. hardly B. really C. rather(更確切的 D. clearly(清晰的(

5、 5. Jackie is _ careful, so he seldom(很少 makes mistake.A. usually B. never C. always D. sometimes( 6. _ they are brothers, they dont look like each other at all.A. Because B. Though C. When D. As( 7. I _ at this time of yesterday.A. started do my homework B. started my homeworkC. started to do my ho

6、mework D. started did my homework( 8. Who knows the key _ Exercise 1? Put up your hands.A. to B. of C. with D. about( 9. I usually come to school _.A. by a bus B. on foot C. by foot D. on bus( 10. Its a fine day _ a walk.A. in B. of C. for D. at( 11. I like _ in the early morning.A. a walk B. walks

7、C. walking D. on foots( 12. _ do you usually go home?A. How B. What C. Where D. Who( 13. _ she leave home at six? Yes, she does.A. Is B. Can C. Do D. Does( 14. We cant see _ sun at night.A. a B. an C. the D. no( 15. I usually walk to school, but I _ come by bus.A. some times B. often C. sometimes D.

8、 maybe( 16. Look, there is a boy over there _ the tree.A. on B. in C. at D. of( 17. She _ back home once a year with her parents.A. is going B. go C. goes D. going( 18. My father goes to work _ every day.A. by a bike B. in a bike C. on a bike D. ride bikes( 19. What does your father do? _.( 20. Here

9、 is a post card_.A. from she to he B. from hers to him C. to him from her D. from her to himA. speak , a little words B. say, a little words C. speak, a little D. say, a little( 23. He works very hard because he wants _ money for his family.A. to make B. doing C. look for D. to find( 24. Sleeping to

10、o late is _ your health.A. good for B. bad for C. good to D. bad to( 25. Some of us watch TV three _ four _a week.A. and, time B. but, time C. or, time D. or, times( 26. Li Lei likes _ a red hat.A. putting on B. to put on C. wearing D. wears( 27. I do homework every day when I come _ home _ school.A

11、. to, from B. at, for C. , from D. from, to( 28. I love junk food too, _ I try to _ only once a week.A. but, eat B. but, eat them C. and, eat D. but, eat it( 29. My mother isnt in, I must _ my sister at home.A. look at B. look after C. look up D. look out( 30.I often _ on weekends.A. go to movie B.

12、go the movies C. going to the movies D. go to the movies( 31. What _ the boy always do on weekends?He always _ football _ his friends.A. does, plays, with B. does, play, and C. do, plays, and D. do, play, with( 32. My parents usually _ books after dinner.103千克/A. to B. at C. with D. in( 37. _? Nothi

13、ng. I only want to sleep for a while.A. Whats up B. How much is there C. Whats matter D. Are you OK( 38. _ your brother and you _ any questions?A. Do, has B. Do, have C. Does, have D. Does, has( 39. Shall we go to visit the Great Wall first? _A. Yes, we do B. Yes, lets go C. No, you shouldnt D. Its

14、a pity( 40. Youd better _ to send me an e-mail when you get home.A. not to forget B. dont forget C. to not forget D. not forget2）若冰塊吸熱后，有3分米3A. at B. of C. in D. on( 47. -Whats the matter? _ -_A. Im not thirsty B. She has a sore throat C. Im very sorry D. Youre wrong maybe( 48.-_ did you start singi

15、ng? -Two years ago.A. How B. When C. Where D. Why( 49. It is _ today than yesterday . Shall we go swimming this afternoon ?A. the hottest B. hot C. hottest D. hotter( 50. -You can go to the policeman for help. -_.A. Sure B. Its bad C. Good idea D. Youre right( 51. I have a toothache. Maybe you shoul

16、d see a _.A. teacher B. nurse C. worker D. dentist( 52. Whats on TV tonight? Is there _ interesting? Im afraid not.A. something B. nothing C. anything D. everything( 53. Excuse me, have you got any ink(墨水? Yes, but only _.A. a little B. a few C. little D. few( 54. -May I take this book out of the re

17、ading room? -_, please read it here.、學(xué)校安裝電路需用銅線，現(xiàn)手頭有一卷銅線,其質(zhì)量是178千克，橫截面積是2.5平方毫米，這卷銅線的長(zhǎng)度是多少米？（銅=8.9×A. to write B. to write down C. to write on D. to write with( 68. I dont feel _. The doctor asked me to go and see him _ three days.A. well, every B. well, each C. good, each D. good, every( 69. T

18、here is _ with your computer.A. much something wrong B. much wrong somethingC. nothing much wrong D. something wrong much( 70. Youre very tired. Youd better _.A. stop to working B. stop working C. to stop to work D. stop to work( 71.- _ is he staying here? -From Monday to Saturday.A. How often B. Ho

19、w far C. How long D. When( 72. Were _ this Sunday.A. go fishing B. going camp C. going shopping D. go hikingA. beautifully B. happily C. nice D. pretty( 76. May I ask some questions _ that thing. Sure!A. of B. for C. about D. to( 77. I dont know that boy _ can dance well.A. this B. who C. what D. wh

20、ere( 78. He is a _ star, everyone here knows him.A. interesting B. exciting C. funny D. famous( 79. I _ you can get better soon.A. wish B. hope C. hear D. would( 80. My brother _ with his friends tomorrow if it _.A. is going to hike, wont rain B. is going hiking, doesnt rainC. will go hiking , wont

21、rain D. goes hiking, doesnt rain( 81. My grandparents live in a village nearby. I usually go _ them once a week.A. sees B. seeing C. saw D. to see( 82. Im interested in animals, so I _ every Saturday working in an animal hospital.A. pay B. get C. take D. spend( 83. _ have you been here? For a month.

22、A. How often B. How far C. How long D. How soon( 84. Sorry, I dont /返回）your book on time.” “_.”A. I agree with you B. It doesnt matter C. Youre welcome D. Thats a good idea( 85. We went to the country _ a very cold morning.A. at B. in C. on D. for( 86. -Whats he doing for vacation? -He _ his brother

23、.A. is babysit B. babysitting C. babysitted D. is babysitting( 87. She _ going to have a trip, finally decided on going boating.A. thought about B. thought over C. thought for D. thought of千克A. have B. on have C. having D. to have( 90. Jim, with his friends _ going fishing this afternoon.A. am B. ar

24、e C. is D. were( 91. Would you like _ with me?A. go surfing B. go surf C. to go surfing D. going surfing( 92. That boy likes _, he often goes _ on weekends.A. fish, fish B. fishing, fishing C. fish, fishing D. fishing, fish( 93. I know there are many people there _ speak English.A. where B. whose C.

25、 what D. who( 94. I often forget _ my keys.A. bring B. take C. to bring D. taking( 95. That house is empty. There is _ in it.A. anything B. something C. everything D. nothing( 96. There _ a football game this afternoon.A. will have B. is going to be C. has D. have( 97. Yesterday I saw _ enjoy _ in t

26、he park.A. her, hers B. they, them C. she, herself D. them, themselves( 98. Lucy and Lily are twins. Lucy likes playing basketball. _ Lily doesnt.A. and B. as C. but D. or7一捆銅絲的質(zhì)量為20千克，剪下5米長(zhǎng)的一段稱得其質(zhì)量為0.89千克，已知銅的密度為8.9×103千克米3，那么這捆銅絲有多長(zhǎng)？這根銅絲有多粗？8、如果磚的密度是2×103千克米3，一塊磚的體積是1.4×103厘米3，那么一輛能

27、裝載4噸的汽車最多能運(yùn)多少塊磚？9、一零件的木模質(zhì)量為200克，利用翻砂鑄模技術(shù)，制作鋼制此零件30個(gè)，需要多少千克鋼材？（木=0.6×10³kg/m³）10宇宙中有一種中子星，其密度可達(dá)1×1017 kg/m3，試算一算一個(gè)約乒乓球(體積約為34 cm3大小的中子星的質(zhì)量.如果一輛汽車每次運(yùn)載10 t，則需多少次才能將此物質(zhì)運(yùn)完？三、空心與混合的問題1. 一個(gè)體積是40cm3的鐵球，質(zhì)量是156g，這個(gè)鐵球是空心的還是實(shí)心的？（鐵=7.8×103kg/m3）若是空心的，空心部分的體積多大？2、鹽水選種是我國(guó)勞動(dòng)人民很早就發(fā)明的一種選飽滿種子的

28、方法：選芒粳稻種需要配制密度為1.1×103Kg/m3的鹽水，某農(nóng)戶配制了50L鹽水，取出50ml進(jìn)行檢測(cè)，測(cè)得這些鹽水的質(zhì)量為600g，（測(cè)完后將鹽水還倒回）。（1） 請(qǐng)幫助他分析一下這樣的鹽水是否符合要求，如不符合則應(yīng)采取什么措施？（2） 將這些鹽水配制到符合要求時(shí)共為多少升？3. 有一質(zhì)量為千克的鋁球，體積是3000厘米3，試求這個(gè)鋁球是實(shí)心還是空心？如果是空心，則空心部分體積多大？如果給空心部分灌滿水，則球的總質(zhì)量是多大？（鋁×103千克/米3）4用20g密度為的金和10g密度為的銅合在一起制作一工藝品，制成后工藝品的密度為多大？5有一塊20m3的礦石，為了測(cè)出它的

29、質(zhì)量，從它上面取10cm3樣品，測(cè)得樣品的質(zhì)量為26g，根據(jù)以上數(shù)據(jù)求出礦石的密度和質(zhì)量？6、有一節(jié)油車，裝滿了30米3的石油，為了估算這節(jié)油車所裝石油的質(zhì)量，從中取出了30厘米3石油，稱得質(zhì)量是克，問：這節(jié)油車所裝石油質(zhì)量是多少？×104kg7：老板派小姚去訂購(gòu)酒精，合同上要求酒精的密度小于或者是等于就算達(dá)標(biāo)，小姚在抽樣檢查時(shí)，取酒精的樣本500ml，稱得的質(zhì)量是420g. 請(qǐng)你通過計(jì)算說明小姚的結(jié)論是 (A 達(dá)標(biāo) B 不達(dá)標(biāo)，含水太多 你認(rèn)為小姚該怎么辦?(酒×103 kg/m3 水×103 kg/m38、不用天平，只用量筒，如何量出100克酒精來？9、一臺(tái)拖

30、拉機(jī)耕地一畝耗油，它的油箱的容積是100升,柴油的密度是850kg/m3，該拖拉機(jī)裝滿油后最多耕地的畝數(shù)是多少?10. 用鹽水選種，要求鹽水的密度是1.1×103kg/m3，現(xiàn)在配制了0.5dm3的鹽水，稱得鹽水的質(zhì)量是0.6kg。這種鹽水合不合要求？若不合要求，應(yīng)加鹽還是加水？加多少？11用20g密度為的金和10g密度為的銅合在一起制作一工藝品，制成后工藝品的密度為多大？12、一個(gè)體積是40cm3的鐵球，質(zhì)量是156g，這個(gè)鐵球是空心的還是實(shí)心的？（鐵×103kg/m3）若是空心的，空心部分的體積多大？四、反饋與練習(xí)1有一塊20m3的礦石，為了測(cè)出它的質(zhì)量，從它上面取10cm3樣品，測(cè)得樣品的質(zhì)量為26g，根據(jù)以上數(shù)據(jù)求出礦石的密度和質(zhì)量？2一位飛機(jī)設(shè)計(jì)師為了減輕飛機(jī)的重力，將其中一個(gè)鋼制零件換成鋁制的，使其質(zhì)量減少了102千克，則制作該零件需要鋁多少千克？（鋼=7.8×103千克米3）3. 已知每個(gè)木模的質(zhì)量m木=5.6kg，木頭的密度 木=0.7×103kg/m3。現(xiàn)某廠用這個(gè)木模澆鑄鐵鑄件100個(gè)，需要熔化多少鐵？4有一瓶裝滿水后總質(zhì)