1.
Acceleration due to gravity is 10 N/kg. The surface area of fish pressed by the water above it is 6 cm2. Determine the force of water above fish that acts on fish.
Հայտնի է.
Արագացում ձգողականության պատճառով (g) = 10 N/kg
Surface area of fish (A) = 6 cm2 = 6 x 10-4 m2
Խտություն of water = 1 gram/cm3 = 1 (10-3 kg) / 10-6 m3 = 103 կգ / մ3 = 1000 կգ/մ3
Height of water = 100 cm – 15 cm = 85 cm = 85 x 10-2 մետր
Ցանկալի է. Force of the water above fish that acts on fish
Լուծում.
Equation of ճնշում:
P = F / A
F = P A
F = ρ g h A
F = (1000)(10)(85 x 10-2)(6 x 10-4 m2)
F = (104)(510 x 10-6)
Ֆ = 510 x 10-2
Ֆ = 5.1 Նյուտոն
2. The normal pressure of blood is 80 mm hg to 120 mm hg. This value is equal to…
A. 80 Pascal to 120 Pascal
B. 800 Pascal to 1200 Pascal
C. 10256 Pascal to 17589 Pascal
D. 10526 Pascal to 15789 Pascal
Հայտնի է.
The normal pressure of blood = 80 mm Hg – 120 mm Hg
SE busca: This value is equal to… Pascal
Լուծում.
The height of mercury in a barometer (above the surface of the sea) = 760 mm Hg
Pressure of air (above the surface of sea) = 1 atm = 1.0 x 105 Pascal
1 mm Hg = ……. Pascal?
80 mm Hg = 80 x 131.58 Pascal = 10,526 Pascal
120 mm Hg = 120 x 131.58 Pascal = 15,789 Pascal
Ճիշտ պատասխանը Դ-ն է։
3. Above the surface of the sea, the height of mercury in a barometer is 760 mm. If at a place, the height of mercury in a barometer is 700 mm. Determine the pressure of air at that place.
Հայտնի է.
The height of mercury in a barometer (above the surface of the sea) = 760 mm Hg
Pressure of air (above the surface of sea) = 1 atm = 1,013 x 105 Pascal
SE busca: Determine the pressure of air if the height of mercury is 700 mm
Լուծում.
760 mm Hg = 1.013 x 105 Pascal
700 mm Hg = ……… Pascal?
