The deepest point in the ocean is 11 km below sea level, deeper than Mt. Everest is tall. What is the pressure in atmospheres atthis depth?
The pressure is 1096 atm
Deepest point in the ocean is 11 km below sea level
Total pressure is calculated by
PTotal = Patm + hρg ...............................(1)
PTotal = pressure at the bottom = 1.3 atm
Patm = atmospheric pressure = atm
h = depth of liquid = 2 m
ρ= density of liquid
g = gravitational acceleration
Calculate hρg , consider g = 9.8 m/s2 and density of sea water is 1029 kg/m3
hρg = 11 x 103m x 1029 kg/m3 x 9.8 m/s2
hρg = 1.10926 x 108 Pa
Convert into atm pressure =
Substitute the value in equation (1)
PTotal = 1 + 1094.74 = 1095.74 = 1096 atm (approx)
The tank shown in is completely filled with a liquid of density . The right face is not permanently attached to the tank but, instead, is held against a rubber seal by the tension in a spring. To prevent leakage, the spring must both pull with sufficient strength and prevent a torque from pushing the bottom of the right face out.
a. What minimum spring tension is needed?
b. If the spring has the minimum tension, at what height from the bottom must it be attached?
The two --diameter cylinders in FIGURE , closed at one end, open at the other, are joined to form a single cylinder, then the air inside is removed.
A. How much force does the atmosphere exert on the flat end of each cylinder?
B. Suppose one cylinder is bolted to a sturdy ceiling. How many football players would need to hang from the lower cylinder to pull the two cylinders apart?
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