atmospheric pressure is 14.7 psi. Automobile tires are normally inflated to a pressure of
about 24 psi, while road bicycle tires are inflated to pressures as high as 120 psi. The
tire readings reflect the amount of pressure inside the tires over atmospheric pressure.
The total (absolute) pressure inside a tire is the sum of atmospheric pressure and the
gauge reading (a total of about 135 psi for the bicycle tire).P = F/A
P = pressure
F = force
A = surface area
Units: pascal (Pa), newton/meter^2
Atmospheric pressure at sea
level
Patm = 101,300 Pa § 1 bar
What is the pressure inside the
bottom of the aquarium caused
solely by the weight of the
water?
P = F/A
P = 927 N / 0.300 m^2
P = 3090 Pa
(^250) Copyright 2000-2007 Kinetic Books Co. Chapter 13