Piv txwv ntawm Cov Lus Nug Txog Qhov Muaj Peev Xwm ntawm Chav

12 Piv txwv ntawm Cov Lus Nug Txog Qhov Muaj Peev Xwm

1. Saib daim ntawv teev lus hauv qab no!

Los ntawm lub rooj saum toj no, qhov uas muaj cov chav thiab qhov ntev yog tus lej...
A. 1 xwb
B. 1 thiab 2 xwb
C. 1, 2 thiab 3
D. 1 thiab 3 xwb
E. 2 thiab 3 xwb
Kev Sib Tham
1. Lub sij hawm ntawd
Tus qauv ntawm lub zog yog p = mv
Kev piav qhia: p = momentum, m = mass, v = velocity
Qhov loj ntawm pawg = M thiab qhov loj ntawm qhov ceev = L/T = LT^-1 yog li ntawd cov dimensions momentum yog MLT^-1
Chav ntsuas thoob ntiaj teb ntawm lub zog yog kg m/s = kg ms^-1

2. Hom
Tus qauv rau lub zog yog F = ma
Kev piav qhia: F = lub zog, m = pawg, a = kev ua kom nrawm dua
Qhov loj ntawm pawg = M thiab qhov loj ntawm kev nrawm = L/T² = LT^-2 yog li ntawd cov dimensions tus qauv yog MLT^-2
Chav ntsuas thoob ntiaj teb ntawm lub zog yog kg m/s² = kg/ms^-2

3. Lub zog
Tus qauv ua haujlwm yog W = Fs
Kev piav qhia: W = kev siv zog, F = lub zog, s = kev hloov chaw
Qhov loj ntawm lub zog yog MLT^-2 thiab qhov loj ntawm qhov hloov chaw yog L yog li ntawd qhov loj ntawm qhov kev lag luam yog [M][L][T]^-2 [L] = [M][L]2[T]^-2

Tus qauv fais fab yog P = W / t
Kev piav qhia: P = lub zog, W = ua haujlwm, t = lub sijhawm
Qhov ntev ntawm lub lag luam yog [M][L]2[T]^-2 thiab qhov ntev ntawm lub sijhawm yog [T] yog li qhov ntev ntawm lub zog yog [M][L]2[T]^-2 / [T] = [M][L]²[T]^-2 [T]^-1 = [M][L]²[T]^-3
Chav ntsuas thoob ntiaj teb ntawm lub zog yog kg m²/s³ = kg/m²² s^-3
Cov lus teb yog B.

2. Saib daim ntawv teev lus hauv qab no!
Los ntawm lub rooj uas muaj cov chav thiab qhov ntev raug, tus lej ntau npaum li cas yog ...
A. 1 xwb
B. 1 thiab 2 xwb
C. 1, 2 thiab 3
D. 1 thiab 3 xwb
E. 2 thiab 3 xwb
Kev Sib Tham
Cov mis ntawm lub zog momentum yog p = m v.
Qhov hnyav (m) muaj cov chav ntawm kilograms (kg) thiab qhov ceev (v) muaj cov chav ntawm meters ib ob (m/s) yog li cov chav ntawm lub zog yog kg m/s lossis kg ms^-1Kilogram yog ib chav ntawm qhov hnyav nrog qhov ntev [M], 'meter' yog ib chav ntawm qhov ntev nrog qhov ntev [L], thib ob yog ib chav ntawm lub sijhawm nrog qhov ntev [T] yog li qhov ntev ntawm lub zog yog [M][L]/[T] lossis [M][L][T]^-1.

Cov mis rau lub zog yog F = m a.
Qhov hnyav (m) muaj cov chav ntawm kilograms (kg) thiab qhov kev nrawm (a) muaj cov chav ntawm meters ib ob squared (m/s).²) yog li ntawd, lub chav ntawm lub zog yog kg m/s² los yog kg ms^-2Kilogram yog ib chav ntawm qhov hnyav nrog qhov ntev [M], 'meter' yog ib chav ntawm qhov ntev nrog qhov ntev [L], qhov thib ob yog ib chav ntawm lub sijhawm nrog qhov ntev [T] yog li qhov ntev ntawm lub zog yog [M][L]/[T]² los yog [M][L][T]^-2

Tus qauv rau lub zog yog P = W/t, tus qauv rau kev ua haujlwm yog W = Fs, thiab tus qauv rau lub zog yog F = ma.
Lub chav ntawm qhov hnyav yog kilogram (kg), lub chav ntawm kev nrawm yog meter ib ob squared (m/s).²) yog li ntawd, lub chav ntawm lub zog yog kg m/s²Lub chav ntawm kev hloov chaw yog 'meter' (m), lub chav ntawm lub zog yog kg m/s² yog li ntawd, chav ua haujlwm yog kg m / s² xm = kgm²/s²Lub sijhawm yog vib nas this (s), lub sijhawm ua haujlwm yog kg m²/s² yog li ntawd, lub zog ntawm lub zog yog kg m²/s² : s = kg/m²/s³ los yog kg m² s^-3.
Kilogram yog ib chav ntawm qhov hnyav nrog qhov ntev [M], 'meter' yog ib chav ntawm qhov ntev nrog qhov ntev [L], qhov thib ob yog ib chav ntawm lub sijhawm nrog qhov ntev [T] yog li qhov ntev ntawm lub zog yog [M][L]²/[T]³ los yog [M] [L]²[T]^-3.
Cov lus teb yog B.

3. Ntawm cov khoom hauv qab no, qhov uas yog cov khoom yooj yim yog…..
A. pawg, qhov hnyav, qhov nrug, lub zog
B. ntev, lub zog, lub zog txav mus los, qhov ceev
C. lub zog tam sim no, qhov ntau ntawm cov khoom, qhov kub thiab txias, qhov deb
D. lub sijhawm, lub zog, kev nrawm, kev nyuaj siab
E. kev siv zog, lub teeb ci ntsa iab, lub ntiajteb txawj nqus, lub zog ib txwm muaj
Kev Sib Tham
Qhov deb = ntev
Cov lus teb yog C.

4. Lub zog yog qhov ntau ntawm kev ua haujlwm lossis lub zog ib chav ntawm lub sijhawm, qhov loj ntawm lub zog yog ...
A. MLT
B. MLT^-1
C. MLT^-2
D. M L2 T^-2
E. M L2 T
Kev Sib Tham
Lub zog mis:

Cov Ntaub Ntawv:
W = ua haujlwm, F = lub zog, a = kev nrawm, v = qhov ceev, s = qhov deb, t = lub sijhawm.
m = pawg (qhov ntev ntawm pawg = M), s = qhov deb (qhov ntev ntawm qhov deb = L), t = lub sijhawm (qhov ntev ntawm lub sijhawm = T).
Yog li ntawd, cov yam ntxwv ntawm lub zog yog:

Cov lus teb yog yog E.

5. Saib daim ntawv teev cov txiaj ntsig ntsuas ntawm plaub tus tub ntxhais kawm txog cov khoom siv hauv lub cev raws li hauv qab no!
Cov ntaub ntawv hauv lub rooj yog qhov tseeb thiab raws li SI (International System) units uas cov tub ntxhais kawm tau nthuav tawm...

1. R thiab S
2. P thiab R
3. P thiab Q
4. Q thiab S

Kev Sib Tham
Tub Ntxhais Kawm P:
Lub Txheej Txheem Thoob Ntiaj Teb ntawm Chav (SI) rau qhov ntev yog 'meter' (m), tsis yog centimeter (cm).
Lub cuab yeej ntsuas qhov ntev yog tus kav.
Tub Ntxhais Kawm Q:
Lub Txheej Txheem Thoob Ntiaj Teb ntawm Chav (SI) rau hluav taws xob tam sim no yog Ampere (A)
Cov cuab yeej siv los ntsuas hluav taws xob tam sim no yog ammeter.
Tub Ntxhais Kawm R:
Lub Txheej Txheem Thoob Ntiaj Teb ntawm Chav (SI) rau qhov kub thiab txias yog Kelvin (K)
Cov cuab yeej siv los ntsuas qhov kub thiab txias yog lub thermometer, tsis yog lub hydrometer.
Lub hydrometer yog ib lub cuab yeej siv los ntsuas qhov ceev ntawm dej.
Tub Ntxhais Kawm S:
Lub Txheej Txheem Thoob Ntiaj Teb ntawm Chav (SI) rau qhov hnyav yog kilogram (Kg).
Lub cuab yeej siv los ntsuas qhov hnyav yog lub tshuab sib npaug.

Cov ntaub ntawv hauv lub rooj yog qhov tseeb thiab raws li SI (International System) units uas cov tub ntxhais kawm Q thiab S tau nthuav tawm.
Cov lus teb yog D.

6. Qhov kev sib raug zoo ntawm cov nqi thiab cov chav yog….
Kev Sib Tham
Lub zog = Qhov hnyav x Kev nrawm
Chav SI ntawm qhov hnyav yog kilogram (kg)
Chav SI ntawm kev nrawm yog 'meter' ib ob squared (m/s)²)
Yog li ntawd, lub zog = kg m/s² = kg/ms^-2

Siab = Lub Zog / Thaj Chaw Nto
Chav SI ntawm lub zog yog kg m/s²
Chav SI ntawm thaj chaw nto yog m²
Yog li ntawd, chav tsev ntawm lub siab = kg / ms² = kg/m²^-1 s^-2

Zog = Ua Haujlwm
Ua Haujlwm = Lub Zog x Kev Hloov Chaw
Chav SI ntawm lub zog yog kilogram 'meter' ib ob squared (kg m/s)²)
Chav SI ntawm kev hloov chaw yog 'meter' (m)
Yog li ntawd, chav tsev ntawm lub zog = chav tsev ntawm kev ua haujlwm = kg m²/s² = kg/m²² s^-2

Lub zog = Ua haujlwm / Lub sijhawm
Chav SI ntawm kev ua haujlwm yog kilogram meters squared ib ob squared (kg m)²/s²)
Lub sijhawm SI yog qhov thib ob (s)
Yog li ntawd, chav tsev ntawm lub zog = kg / m²/s³ = kg/m²² s^-3
Cov lus teb yog D.

7. Yuav tsum muaj ib nrab liv mis nyuj tshiab ua cov khoom xyaw rau cov kua pudding, yog li ntawd yuav tsum ntxiv mis nyuj rau cov khoom xyaw hauv cov kua pudding....

1. 5000 ml
2. 500 cc
3. 50 dm³
4. 5 m³

Kev Sib Tham
Nws paub tias:
Mis nyuj = 0,5 liv
Lo lus nug: 0,5 liv = ….. ml = ….. cm³ (cc) = ….. dm³ = ….. m³
Lus teb:
1 liv = 1000 milliliters (1000 ml)
1 liv = 0,001 m³ = 1 dm³ Luas = 1000 cm³ (1000 cc)

0,5 liv = (0,5)(1000 ml) = 500 ml
0,5 dm³ = (0,5)(1000 cc) = 500 cc
0,5 liv = 0,5 dm³ = 0,0005 m³
Cov lus teb yog B.

8. Yog tias ntxiv 250 cc dej rau hauv 100 milliliters ntawm cov mis nyuj ua kua, cov mis nyuj uas tau los yuav yog….

1. 12,5 dm³
2. 1,25 dm³
3. 3,5 dm³
4. 0,35 dm³

Kev Sib Tham
Nws paub tias:
Qhov ntim mis nyuj = 100 ml
Qhov ntim dej = 250 cc = 250 cm³
Lo lus nug: 100 ml + 250 cc = ….. dm³
Lus teb:
ml = milliliter
cc = cm³ = cubic centimeter
dm³ = cubic decimeter

1 dm³ = 1 liter = 1000 milliliters yog li 100 milliliters = 100/1000 litres = 1/10 liter = 0,1 liter = 0,1 dm³
1 dm³ Luas = 1000 cm³ txog li 250 cm³ = 250/1000 dm³ = 1/4 dm³ = 0,25 dm³

100 ml + 250 cm³ = 0,1 dm³ + 0,25 dm³ = 0,35 dm³
Cov lus teb yog D.

9. Ib chav kawm uas ntev 10 m thiab dav 8 m muaj ib lub hauv pem teb ceramic uas ntsuas 20 cm x 20 cm. Tus naj npawb ntawm cov vuas ceramic hauv pem teb hauv chav yog….

1. 20 buah
2. 200 buah
3. 2000 buah
4. 20000 buah

Kev Sib Tham
Nws paub tias:
Qhov loj ntawm chav kawm:
Ntev = 10 meters
Luas = 8 meters
Thaj chaw kawm ntawv = 10 m x 8 m = 80 m²

Qhov loj ntawm cov khoom siv av nplaum:
Ntev = 20 cm
Dav = 20 cm
Thaj chaw ua los ntawm av nplaum = 20 cm x 20 cm = 400 cm²

Lo lus nug: Tus naj npawb ntawm cov vuas hauv pem teb hauv chav
Lus teb:
1 m = 100 cm
1 m² Luas = 10.000 cm²
Yog li ntawd 80 m² = 80 x 10.000 cm² Luas = 800.000 cm²

Tus naj npawb ntawm cov vuas = Thaj chaw kawm ntawv / Thaj chaw vuas
Tus naj npawb ntawm cov khoom siv av nplaum = 800.000 cm² / 400 cm kuv²
Tus naj npawb ntawm cov khoom siv av nplaum = 2000 daim
Cov lus teb yog C.

10. Txhua ob, muaj 4 cc dej ntws tawm ntawm lub thoob dej uas xau. Cov dej ntws no raug sau rau hauv lub thoob 5-liter. Lub thoob puv nkaus hauv….

1. 125 vib nas this
2. 200 vib nas this
3. 1250 vib nas this
4. 2000 vib nas this

Kev Sib Tham
Nws paub tias:
1 liv = 1 dm³ Luas = 1000 cm³

Qhov ntim dej = 4 cc = 4 cm³
Lub thoob ntim = 5 liv = 5 dm³ = 5 x 1000 cm³ Luas = 5000 cm³   
Lus Nug: Lub thoob yuav siv sijhawm ntev npaum li cas kom puv?
Lus teb:
5000 cm³ / 4 cm kuv³ = 1250 vib nas this
Cov lus teb yog C.

11. Qhov kev txiav txim kom raug ntawm cov lus ua ntej rau cov chav loj tshaj plaws mus rau me tshaj plaws yog….

1. Mega, terra, nano, pico
2. Giga, Mega, Micro, Nano
3. Piko, Nano, Mega, Terra
4. Mega, Terra, Micro, Piko

Kev Sib Tham
Cov lus teb yog B.

12. Qhov loj thiab cov chav nyob

Ua tib zoo saib lub rooj hauv qab no!

Raws li lub rooj saum toj no, cov pab pawg ntawm cov khoom muab tau los thiab lawv cov chav nyob hauv International System yog qhia los ntawm cov lej...

A. (1), (2), thiab (3)

B. (1), (4), thiab (5)

C. (2), (3), thiab (4)

D. (3), (4), thiab (5)

Kev Sib Tham

(1) Cov nqi tau los ntawm

(2) Tus nqi tseem ceeb

(3) Tus nqi tseem ceeb

(4) Cov nqi tau los ntawm

(5) Cov nqi tau los ntawm

Cov lus teb yog B.