1.
Ọkwa ike ndọda nke sitere na ike ndọda bụ 10 N/kg. Oke elu azụ̀ nke mmiri dị n'elu ya na-akwa bụ 6 cm 2. Chọpụta ike mmiri dị n'elu azụ̀ nke na-arụ ọrụ n'azụ̀.
A maara:
Ọsọ ọsọ n'ihi ike ndọda (g) = 10 N/kg
Oke elu azụ̀ (A) = 6 cm 2 = 6 x 10 -4 m 2
Njupụta mmiri = gram 1/cm 3 = 1 (10 -3 kg) / 10 -6 m 3 = 10 3 kg/m 3 = 1000 kg/m 3
Ogologo mmiri = 100 cm – 15 cm = 85 cm = 85 x 10 -2 mita
Achọsiri ike: Ike mmiri dị n'elu azụ nke na-arụ ọrụ n'azụ
Ngwọta:
Nha nrụgide :
P = F / A
F = PA
F = ρ gh A
F = (1000)(10)(85 x 10 -2 )(6 x 10 -4 m 2 )
F = (10 4 )(510 x 10 -6 )
F = 510 x 10 -2
F = 5.1 Newton
2. Nrụgide ọbara nkịtị bụ 80 mm Hg ruo 120 mm Hg. Uru a hà nhata…
A. Pascal 80 ruo Pascal 120
B. Pascal 800 ruo Pascal 1200
C. 10256 Pascal ruo 17589 Pascal
D. 10526 Pascal ruo 15789 Pascal
A maara:
Nrụgide ọbara nkịtị = 80 mm Hg – 120 mm Hg
Achọtara: Uru a hà nhata na… Pascal
Ngwọta:
Elu nke mercury na barometer (n'elu elu oké osimiri) = 760 mm Hg
Nrụgide nke ikuku (n'elu elu oké osimiri) = 1 atm = 1.0 x 10 Pascals 5
1 mm Hg = ……. Pascal?
80 mm Hg = 80 x 131.58 Pascals = 10,526 Pascals
120 mm Hg = 120 x 131.58 Pascals = 15,789 Pascals
Azịza ya ziri ezi bụ D.
3. N'elu elu oké osimiri, elu mercury dị na barometer bụ 760 mm. Ọ bụrụ na ọ nọ n'ebe, elu mercury dị na barometer bụ 700 mm. Chọpụta nrụgide ikuku n'ebe ahụ.
A maara:
Elu nke mercury na barometer (n'elu elu oké osimiri) = 760 mm Hg
Nrụgide nke ikuku (n'elu elu oké osimiri) = 1 atm = 1,013 x 10 Pascals 5
Achọrọ: Chọpụta nrụgide ikuku ma ọ bụrụ na elu nke mercury bụ 700 mm
Ngwọta:
760 mm Hg = 1.013 x 10 5 Pascals
700 mm Hg = …… Pascal?
