PASCO AP-8219 Instruction Manual

®

Instruction Manual

Adapter rings

Tungsten spheres

Attach to

Earth

Gro

und.

GRA

VIT

ATIONAL

T

ORSION B

ALANCE

A

P

-8

21

5

Large Mass

Adapter Ring

Large Mass

Swivel Support

Gravitational

Torsion Balance

012-11233A

*012-11233*

Replacement Gravity Balls

AP-8219

Introduction

The AP-8219 Replacement Gravity Balls set is
designed to replace the large lead masses in the
AP-8215 Gravitational Torsion Balance.

The Replacement Gravity Balls set consists of two
large tungsten spheres (1.5 kilogram each), and two
adapter rings. The rings allow the tungsten spheres
to rest on the Large Mass Swivel Support of the
Gravitational Torsion Balance (see Figure 1).

Included:

Large Mass, Gravitational Torsion Balance (2)

Adapter Ring (2)

Required: Model

Gravitational Torsion Balance AP-8215

The tungsten Large Mass has a radius of 27.6 milli­meters. This value is used in the calculation of G,
the universal gravitational constant.

Assembly

Figure 1: Large Mass and Adapter RIng

Place an Adapter Ring into the hole at one end of
the Large Mass Swivel Support on the Gravitational
Torsion Balance. Repeat for the other adapter ring.
Carefully place the Large Masses onto the Adapter
Rings on both ends of the Large Mass Swivel Sup­port.

The Adapter Ring allows the center of mass of the
Large Mass to be in alignment with the center of
mass of the Small Mass that is inside the Gravita­tional Torsion Balance case.

800-772-8700 www.pasco.com

®

Replacement Gravity Balls Technical Support

See the Instruction Manual for the AP-8215 Gravitational Torsion Balance for information about setting up and
using the balance.

Safety Precaution

The large masses are made of tungsten and are not toxic. However, be careful not to drop a large mass.

Technical Support

For assistance with any PASCO product, contact PASCO at:

Address: PASCO scientific

10101 Foothills Blvd.
Roseville, CA 95747-7100

Phone: [phone] (worldwide)

800-772-8700 (U.S.)

Fax: [phone]

Web: www.pasco.com

Email: [e-mail]

For more information about the Replacement Gravity Balls and the latest revision of this Instruction Manual,
visit:

www.pasco.com/go?AP-8219

Limited Warranty For a description of the product warranty, see the PASCO catalog.
Copyright The PASCO scientific 012-11233A Replacement Gravity Balls Instruction Manual is copyrighted with all rights reserved.

Permission is granted to non-profit educational institutions for reproduction of any part of this manual, providing the reproductions are
used only in their laboratories and classrooms, and are not sold for profit. Reproduction under any other circumstances, without the
written consent of PASCO scientific, is prohibited.
Trademarks PASCO and PASCO scientific are trademarks or registered trademarks of PASCO scientific, in the United States
and/or in other countries. All other brands, products, or service names are or may be trademarks or service marks of, and are used to
identify, products or services of their respective owners. For more information visit www.pasco.com/legal.

2