One atmosphere is numerically equal to approximately
106 dynes cm-2
102 dynes cm-2
104 dynes cm-2
108 dynes cm-2
1 atm = 106 dynes cm−2
The minimum pressure require to force the blood of density 1.04 g cm-3 from the heart to the top of the head (vertical distance = 60 cm) is:
One arm of a glass U-tube is open to the atmosphere, whereas the other vertical arm is connected to a gas supply. The difference in levels of mercury (density = 13.6 g cm-3) between the vertical arms of the U-tube manometer is h = 3 cm. If the atmospheric pressure is 760 mm Hg and the gravitational acceleration is 9.8 m s-2, then the pressure of the gas is about: