Izibonelo ezi-4 zezinkinga ze-Fluid Continuity Equation
1. Ingxenye eyodwa yepayipi inobubanzi obungama-20 cm kanti enye inobubanzi obungama-10 cm. Uma izinga lokugeleza kwamanzi engxenyeni enkulu yepayipi lingu-30 cm/s, khona-ke izinga lokugeleza kwamanzi engxenyeni encane yepayipi lingu...
A. 80 cm/s
B. 100 cm/s
C. 120 cm/s
D. 130 cm/s
E. 140 cm/s
Ingxoxo:
I-Diketahui :
r1 = 10 cm, r2 = 5cm
v1 = 30 cm/s
Kubuziwe :
v2 ?
Jawab :
Isibalo sokuqhubeka koketshezi:
A1 v1 =A2 v2
Imininingwane:
A1 = indawo enqamulelayo yepayipi 1, v1 = izinga lokugeleza kwamanzi epayipini 1
A2 = indawo enqamulelayo yepayipi 2, v2 = izinga lokugeleza kwamanzi epayipini 2
Indawo enqamula amapayipi:
A1 = phi r12 = (3,14)(10 cm)2 = (3,14)(100 cm2)
A2 = phi r22 = (3,14)(5 cm)2 = (3,14)(25 cm2)
Izinga lokugeleza kwamanzi epayipini 2:
A1 v1 =A2 v2
(3,14)(100 cm2)(30 cm/s) = (3,14)(25 cm2)(v2)
(100)(30 cm/s) = (25)(v)2)
3000 / 25 = v2
v2 = 120 cm/s
Impendulo efanele ngu-C.
2. Uwoyela ugeleza usuka epayipini A uye epayipini B bese ugeleza uye epayipini C. Isilinganiso sendawo enqamula ipayipi A kanye nendawo enqamula ipayipini C singu-5:3. Uma izinga lokugeleza kukawoyela epayipini A lilingana no-2v, khona-ke izinga lokugeleza kukawoyela epayipini C...
A. (3/10)v
B. 2v
C. (10/3)v
D. 5v
E. 9v
Ingxoxo:
I-Diketahui :
A1 = 5, A2 = 3, v1 = 2v
Kubuziwe :
v2 ?
Jawab :
A1 v1 =A2 v2
(5)(2v) = (3)(v)2)
10v = 3(v)2)
v2 = (10/3)v
Izinga lokugeleza kukawoyela epayipini C lingu-(10/3)v
Impendulo efanele ngu-C.
3. Uketshezi lugeleza ngepayipi njengoba kuboniswe esithombeni esilandelayo. Uma indawo enqamulayo A1 = 8 cm2 , A2 = 2 cm2 kanye nesivinini soketshezi v2 = 2 m/s khona-ke ubukhulu be-v1 bungu …
A. 0,5 ms-1
B. 1,0 ms-1
C. 1,5 ms-1
D. 2,0 ms-1
E. 2,5 ms-1
Ingxoxo
I-Diketahui :
Indawo enqamulayo 1 (A)1= 8cm2
Indawo enqamulayo 2 (A)2= 2cm2
Ijubane loketshezi esigabeni esiphambene 2 (v)2) = 2 m/s
Kubuziwe : isivinini soketshezi esigabeni 1 (v1)
Jawab :
Isibalo sokuqhubeka koketshezi :
A1 v1 =A2 v2
8v1 = (2)(2)
8v1 = 4
v1 = 4 / 8 = 0,5 m/s
Impendulo efanele ngu-A.
4. Bheka isithombe! Uma ububanzi besigaba esikhulu buphindwe kabili kunobubanzi besigaba esincane, ijubane lokugeleza koketshezi epayipini elincane...
A. 01 ms-1
B. 04 ms-1
C. 08 ms-1
D. 16 ms-1
E. 20 ms-1
Ingxoxo
I-Diketahui :
Ububanzi obukhulu obunqamula isigaba (d)1= = 2
Irediyasi enkulu yesigaba esiphambeneyo (r)1) = ½ d1 = ½ (2) = 1
Indawo enkulu enqamulayo (A1) = π r12 = π (1)2 = π (1)= π
Ububanzi obuncane obunqamulayo (d)2= = 1
Irediyasi encane enqamula isigaba (r)2) = ½ d2 = ½ (1) = ½
Indawo encane enqamulayo (A2) = π r22 = π (1/2)2 = π (1/4)= ¼ π
Ijubane lokugeleza koketshezi engxenyeni enkulu (v1) = 4 m/s
Kubuziwe : ijubane lokugeleza koketshezi engxenyeni encane v2)
Jawab :
Isibalo sokuqhubeka koketshezi :
A1 v1 =A2 v2
π 4 = ¼ π (v2)
4 = ¼ (v2)
v2 = 8m/s
Impendulo efanele ngu-C.
