Blow up a long cylindrical balloon and it inflates according to Laplace's law. Arteries, which also need to be flexible, are designed to fight against the kind of aneurysms seen in inflating rubber balloons.
Laplace's law for...
Observation of phase changes with corresponding pressure changes.
A two ml. plastic microcentrifuge vial and a small shop vise are used together to melt dry ice.
Wear safety glasses for this demo. The vial can explode, or shoot out of the vice, from the...
Bernoulli's Principle states that the pressure exerted by a fluid is velocity dependent; the faster the velocity the lower the pressure. This can be demonstrated by a form of Venturi tube, a pipe with a narrow constriction which forces an...
A 5-gallon bottle containing air and water vapor is slightly pressurized; a sudden release of the pressure cools the vapor, forming a cloud.
The bottle is a heavy Pyrex carboy with tooled mouth. A one-holed rubber stopper fits the mouth and is air-tight. A...
Three containers are filled with water to the same depth, and each has the same base surface area (see figure 1). Since the pressure and area are the same in each container, the force should be the same (pressure = force/area).
Detection of IR radiation from hair dryer and/or special IR source.
Detection of infra-red radiation by the rotation of a paddle-wheel vane inside a low pressure flask.
A radiometer consists of a partially evacuated flask...
Evaporation of water on duck's head cools vapor inside causing low pressure, etc.
Dippy Duck is a small heat engine consisting of a hollow glass barbell with opposite ends able to seesaw about a knife edge pivot. One end of the barbell is...
The relative velocities of two sides of a spinning ball to an oncoming wind creates a pressure difference and therefore a net force on the ball perpendicular to the air flow.
figure 1. Direction of motion of ball due to pressure difference
Bernoulli's principle shows the velocity dependence of pressure in a fluid. Here, fast flowing air creates a zone of low pressure that holds a beach ball aloft.
He...
Perturbation by colliding atoms in a high pressure gas result in the broadening of emission and absorption lines. This is clearly seen in the sodium D (589nm and 589.6nm) lines of a high pressure sodium lamp.
The broadening in frequency width...
