7 Piv txwv ntawm Cov Teeb Meem Ceev Ntsig Sinking Floating Floating
1. Saib daim ntawv teev cov khoom khov hauv qab no!
Plaub yam khoom uas teev nyob rau hauv lub rooj saum toj no tau muab tso rau hauv ib lub thawv uas muaj dej puv (qhov ceev ntawm dej = 1,0 g/cm2)3). Daim duab uas qhia qhov chaw ntawm cov khoom hauv dej yog...
Kev Sib Tham
Yog tias qhov ceev qhov khoom > qhov ceev ntawm dej ces qhov khoom ntawd poob qis.
Yog tias qhov ceev ntawm ib yam khoom = qhov ceev ntawm dej, ces yam khoom ntawd yuav ntab.
Yog tias qhov ceev ntawm ib yam khoom < qhov ceev ntawm dej ces cov khoom ntab.
Cov khoom 3 thiab 4 muaj qhov ceev ntau dua li qhov ceev ntawm dej yog li lawv thiaj poob dej. Cov khoom 1 thiab cov khoom 2 muaj qhov ceev me dua li qhov ceev ntawm dej yog li lawv ntab.
Cov lus teb yog D.
2. Saib daim ntawv qhia txog qhov ceev ntawm ntau yam khoom uas muaj ntau hom sib txawv hauv qab no!
Raws li cov ntaub ntawv no, yog tias plaub yam khoom raug muab tso rau hauv ib lub thawv, ces daim duab raug yog...
Kev Sib Tham
Qhov ceev ntawm yam khoom 1 (kua) loj dua qhov ceev ntawm yam khoom 2 (kua), yog li yam khoom 1 nyob hauv qab thiab yam khoom 2 nyob saum toj. Piv txwv li, dej muaj qhov ceev ntau dua li roj. Yog tias roj raug nchuav rau hauv lub thawv uas muaj dej puv, cov roj yuav ntab rau saum npoo dej.
Qhov ceev ntawm yam khoom 3 (khoom khov) me dua qhov ceev ntawm yam khoom 1 (kua) thiab ntau dua qhov ceev ntawm yam khoom 2 (kua), yog li ntawd yam khoom 3 poob rau hauv yam khoom 2 thiab ntab rau hauv yam khoom 1. Qhov ceev ntawm yam khoom 4 (khoom khov) loj dua qhov ceev ntawm yam khoom 1 thiab qhov ceev ntawm yam khoom 2 yog li yam khoom 2 poob rau hauv yam khoom 1 thiab 2.
Cov lus teb yog lawm yog A.
3. Saib daim ntawv teev cov tshuaj hauv qab no!
Qhov chaw zoo yog tias cov khoom khov tau muab tso rau hauv cov kua tau qhia nyob rau hauv daim duab...
Kev Sib Tham
Dej hiav txwv thiab roj av yog cov kua, thaum iav thiab dej khov yog cov khoom khov. Qhov ceev ntawm dej hiav txwv ntau dua li roj av, yog li dej hiav txwv nyob hauv qab thiab roj av nyob rau sab saum toj.
Qhov ceev ntawm dej khov loj dua qhov ceev ntawm roj av thiab tsawg dua qhov ceev ntawm dej hiav txwv yog li ntawd dej khov thiaj li poob rau hauv roj av thiab ntab hauv dej hiav txwv.
Qhov ceev ntawm iav yog ntau dua li qhov ceev ntawm roj av thiab dej hiav txwv yog li ntawd lub iav tog hauv roj av thiab dej hiav txwv.
Cov lus teb yog D.
4. Ob yam khoom A thiab B uas muaj qhov hnyav sib npaug raug muab tso rau hauv dej. Yam khoom A ntab thaum yam khoom B ntab. Cov lus tseeb txog qhov xwm txheej no yog...
(1) Qhov ceev ntawm yam khoom B loj dua qhov ceev ntawm yam khoom A
(2) Lub zog ntab uas khoom B tau txais yog loj dua nws qhov hnyav.
(3) Lub zog ntab uas ob yam khoom tau txais nyob ntawm qhov tob
(4) Ob qho khoom muaj tib lub zog ntab
Kev Sib Tham
(1) Khoom A ntab thaum khoom B ntab, yog li ntawd qhov ceev ntawm khoom A ntau dua li qhov ceev ntawm khoom B
(2) Kab lus 2 yog lawm. Ib yam khoom ntab thaum lub zog ntab loj dua nws lub ntiajteb txawj nqus
(3) Nqe lus 3 tsis yog lawm. Qhov kev ntab tsis nyob ntawm qhov tob ntawm dej, tab sis nyob ntawm qhov sib txawv ntawm qhov tob ntawm dej ntawm qhov chaw sab saud thiab sab hauv qab ntawm ib yam khoom uas nyob hauv dej.
(4) Nqe lus 4 tsis yog lawm. Ob yam khoom no muaj zog sib txawv, nyob ntawm seb yam khoom ntawd ntim npaum li cas hauv dej.
5. Muab ib lub pob dej khov uas muaj qhov ceev ntawm 0,90 g/cm3 tso rau hauv roj uas muaj qhov ceev ntawm 0,80 g/cm3 . Cov tsos mob uas tshwm sim yog…
A. dej khov uas ntab
B. 1/9 ntawm cov dej khov raug dej nyab
C. ½ ib feem ntawm cov dej khov
D. 8/9 ntawm cov dej khov raug dej nyab
E. cov dej khov poob tag nrho
Kev Sib Tham
Qhov ceev ntawm dej khov loj dua qhov ceev ntawm roj yog li ntawd dej khov thiaj poob tag.
Cov lus teb yog yog E.
6. Cov khoom A thiab B nyob hauv ib lub thawv uas muaj kua raws li pom hauv daim duab. Qhov ceev ntawm cov kua, cov khoom A thiab B yog…
Kev Sib Tham
Khoom A ntab, qhov ceev ntawm khoom A < qhov ceev ntawm cov kua.
Khoom B tog, qhov ceev ntawm khoom B > qhov ceev ntawm cov kua.
Cov lus teb yog B.
7. Saib daim ntawv ntsuas qhov hnyav thiab qhov ntim hauv qab no!
Qhov chaw raug ntawm cov khoom no thaum lawv muab tso rau hauv cov kua (kua ceev 1 gr / cm 3 ) yog ...
Kev Sib Tham
1. Qhov Ceev = qhov hnyav / ntim = 8 grams / 40 cm 3 = 1/5 gram/cm 3
2. Qhov Ceev = qhov hnyav / ntim = 60 grams / 60 cm 3 = 1 grams/cm 3
3. Qhov Ceev = qhov hnyav / ntim = 200 grams / 40 cm 3 = 5 grams/cm 3
Qhov ceev ntawm cov kua = 1 gram/ cm3
Yog tias qhov ceev ntawm cov khoom < qhov ceev ntawm cov kua.
Yog tias qhov ceev ntawm cov khoom = qhov ceev ntawm cov kua dej, nws yuav ntab.
Poob yog tias qhov ceev ntawm cov khoom > qhov ceev ntawm cov kua.
Cov lus teb yog lawm yog A.
Qhov chaw nug lus:
Cov Lus Nug Txog Kev Xeem Thoob Tebchaws ntawm Tsev Kawm Ntawv Theem Nrab Qib Siab/Islamic Tsev Kawm Ntawv Theem Nrab Qib Siab Science
Cov Lus Nug Txog Physics ntawm SBMPTN
