1.
Kukurumidza kunokonzerwa negiravhiti i10 N/kg. Nzvimbo yepamusoro yehove inodzvinyirirwa nemvura iri pamusoro payo i6 cm 2. Sarudza simba remvura pamusoro pehove rinobata hove.
Zvinozivikanwa:
Kukurumidza kunokonzerwa negiravhiti (g) = 10 N/kg
Nzvimbo yepamusoro pehove (A) = 6 cm 2 = 6 x 10 -4 m 2
Kuwanda kwemvura = 1 gram/cm 3 = 1 (10 -3 kg) / 10 -6 m 3 = 10 3 kg/m 3 = 1000 kg/m 3
Kureba kwemvura = 100 cm – 15 cm = 85 cm = 85 x 10 -2 mamita
Zvinodiwa: Simba remvura iri pamusoro pehove rinobata hove
Solution:
Kuenzana kwekumanikidzwa :
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. Kumanikidzwa kweropa kwakajairika kuri pakati pe80 mm Hg kusvika 120 mm Hg. Kukosha uku kwakaenzana ne…
A. 80 Pascal kusvika 120 Pascal
B. 800 Pascal kusvika 1200 Pascal
C. 10256 Pascal kusvika 17589 Pascal
D. 10526 Pascal kusvika 15789 Pascal
Zvinozivikanwa:
Kumanikidzwa kweropa kwakajairika = 80 mm Hg – 120 mm Hg
Zvaidiwa: Kukosha uku kwakaenzana na… Pascal
Solution:
Kureba kwemercury mu barometer (pamusoro pegungwa) = 760 mm Hg
Kumanikidzwa kwemhepo (pamusoro pegungwa) = 1 atm = 1.0 x 10 5 Pascals
1 mm Hg = ……. Pascal?
80 mm Hg = 80 x 131.58 MaPascal = 10,526 MaPascal
120 mm Hg = 120 x 131.58 MaPascal = 15,789 MaPascal
Mhinduro chaiyo ndiD.
3. Pamusoro pegungwa, kukwirira kwemercury mu barometer i760 mm. Kana iri panzvimbo, kukwirira kwemercury mu barometer i700 mm. Sarudza kumanikidzwa kwemhepo panzvimbo iyoyo.
Zvinozivikanwa:
Kureba kwemercury mu barometer (pamusoro pegungwa) = 760 mm Hg
Kumanikidzwa kwemhepo (pamusoro pegungwa) = 1 atm = 1,013 x 10 5 Pascals
Zvinodiwa: Kuziva kumanikidzwa kwemhepo kana kukwirira kwemercury kuri 700 mm
Solution:
760 mm Hg = 1.013 x 10 5 Pascals
700 mm Hg = …… Pascal?
