1.
Ukusheshisa okubangelwa amandla adonsela phansi kungu-10 N/kg. Indawo engaphezulu yenhlanzi ecindezelwe ngamanzi angaphezu kwayo ingu-6 cm 2. Thola amandla amanzi ngaphezu kwenhlanzi asebenza ezinhlanzini.
Kwaziwa:
Ukusheshisa ngenxa yamandla adonsela phansi (g) = 10 N/kg
Indawo engaphezulu kwenhlanzi (A) = 6 cm 2 = 6 x 10 -4 m 2
Ubuningi bamanzi = 1 gram/cm 3 = 1 (10 -3 kg) / 10 -6 m 3 = 10 3 kg/m 3 = 1000 kg/m 3
Ukuphakama kwamanzi = 100 cm – 15 cm = 85 cm = 85 x 10 -2 amamitha
Okufunwayo: Amandla amanzi angaphezu kwenhlanzi asebenza ezinhlanzini
Isixazululo:
Isilinganiso sokucindezela :
P = F / A
F = PA
F = ρ gh A
F = (1000)(10)(85 x 10 -2 ) (6 x 10 -4 m2 )
F = (10 4 )(510 x 10 -6 )
F = 510 x 10 -2
F = 5.1 Newton
2. Umfutho wegazi ojwayelekile uphakathi kuka-80 mm Hg no-120 mm Hg. Leli nani lilingana no…
A. 80 Pascal kuya ku-120 Pascal
B. 800 Pascal kuya ku-1200 Pascal
C. 10256 Pascal kuya ku-17589 Pascal
D. 10526 Pascal kuya ku-15789 Pascal
Kwaziwa:
Umfutho wegazi ojwayelekile = 80 mm Hg – 120 mm Hg
Okufunwayo: Leli nani lilingana no… Pascal
Isixazululo:
Ukuphakama kwe-mercury ku-barometer (ngaphezu kobuso bolwandle) = 760 mm Hg
Ukucindezela komoya (ngaphezu kobuso bolwandle) = 1 atm = 1.0 x 10 5 Pascals
1 mm Hg = ……. Pascal?
80 mm Hg = 80 x 131.58 Ama-Pascal = 10,526 Ama-Pascal
120 mm Hg = 120 x 131.58 Ama-Pascal = 15,789 Ama-Pascal
Impendulo efanele ngu-D.
3. Ngaphezu kobuso bolwandle, ukuphakama kwe-mercury ku-barometer kungu-760 mm. Uma endaweni ethile, ukuphakama kwe-mercury ku-barometer kungu-700 mm. Thola ingcindezi yomoya kuleyo ndawo.
Kwaziwa:
Ukuphakama kwe-mercury ku-barometer (ngaphezu kobuso bolwandle) = 760 mm Hg
Ukucindezela komoya (ngaphezu kobuso bolwandle) = 1 atm = 1,013 x 10 5 Pascals
Okufunwayo: Thola ingcindezi yomoya uma ukuphakama kwe-mercury kungu-700 mm
Isixazululo:
760 mm Hg = 1.013 x 10 5 Pascals
700 mm Hg = …… Pascal?
