In 1656, the Burgmeister (mayor) of the town of Magdeburg, Germany, Otto Von Guericke, carried out a dramatic demonstration of the effect resulting from evacuating air from a container. It is the basis for this problem. Two steel hemispheres of radius 0.430 m (1.41 feet) with a rubber seal in between are placed together and air pumped out so that the pressure inside is 12.00 millibar. The atmospheric pressure outside is 960 millibar. Calculate the force required to pull the two hemispheres apart. 7070 06 [Note: 1 millibar=100 N/m². One atmosphere is 1013 millibar = 1.013×105 N/m²] Two equal teams of horses, are attached to the hemispheres to pull it apart. If each horse can pull with a force of 1420N (i.e., about 319 lbs), what is the minimum number of horses required?

In 1656, the Burgmeister (mayor) of the town of Magdeburg, Germany, Otto Von Guericke, carried out a dramatic demonstration of the effect resulting from evacuating air from a container. It is the basis for this problem. Two steel hemispheres of radius 0.430 m (1.41 feet) with a rubber seal in between are placed together and air pumped out so that the pressure inside is 12.00 millibar. The atmospheric pressure outside is 960 millibar. Calculate the force required to pull the two hemispheres apart. 7070 06 [Note: 1 millibar=100 N/m². One atmosphere is 1013 millibar = 1.013×105 N/m²] Two equal teams of horses, are attached to the hemispheres to pull it apart. If each horse can pull with a force of 1420N (i.e., about 319 lbs), what is the minimum number of horses required?

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Description: In 1656, the Burgmeister (mayor) of thetown of Magdeburg, Germany, Otto VonGuericke, carried out a dramaticdemonstration of the effect resulting fromevacuating air from a container. It is the basisfor this problem. Two steel hemispheres ofradius 0.4

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Fluid Pressure

The term fluid pressure is coined as, the measurement of the force per unit area of a given surface of a closed container. It is a branch of physics that helps to study the properties of fluid under various conditions of force.

Gauge Pressure

Pressure is the physical force acting per unit area on a body; the applied force is perpendicular to the surface of the object per unit area. The air around us at sea level exerts a pressure (atmospheric pressure) of about 14.7 psi but this doesn’t seem to bother anyone as the bodily fluids are constantly pushing outwards with the same force but if one swims down into the ocean a few feet below the surface one can notice the difference, there is increased pressure on the eardrum, this is due to an increase in hydrostatic pressure.

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Question

In 1656, the Burgmeister (mayor) of the
town of Magdeburg, Germany, Otto Von
Guericke, carried out a dramatic
demonstration of the effect resulting from
evacuating air from a container. It is the basis
for this problem. Two steel hemispheres of
radius 0.430 m (1.41 feet) with a rubber seal
in between are placed together and air
pumped out so that the pressure inside is
12.00 millibar. The atmospheric pressure
outside is 960 millibar. Calculate the force
required to pull the two hemispheres apart.
[Note: 1 millibar=100 N/m². One atmosphere
is 1013 millibar = 1.013×105 N/m²]
Two equal teams of horses, are attached to
the hemispheres to pull it apart. If each horse
can pull with a force of 1420N (i.e., about
319 lbs), what is the minimum number of
horses required?

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