3b-scientific Thermal Expansion Apparatus S User Manual download pdf

Instruction sheet

3B SCIENTIFIC® PHYSICS

U15405 Linear thermal expansion apparatus

3/03 ALF

The apparatus demonstrates the linear expansion of

solid materials and allows the determination of expan-

sion coefficients for copper, iron and glass.

1. Safety instructions

• Caution. The experimental procedure results in hot

steam.

• Do not touch heated rods with your fingers. Use

cloths when replacing rods.

• Do not subject the glass rod to mechanical stresses.

2. Description, technical data

The equipment consists of a base track with a spring

clip at the left-hand end for attaching a testing rod. At

a distance of 50 cm from the end there is a notch in

the base strip for the pointer. The copper and iron test

rods have a ring nut 65 cm from the end for placing on

the pointer. The glass rod has a metal ring with a ring

nut in the same place. Behind the pointer is a 0-5 cm

scale. To feed in hot steam, a 10 cm long glass rod

attached to a hose is provided.

Dimensions: 530 mm x 60 mm x 240 mm

Weight: 0.6 kg

Length of rods: 630 mm approx.

Diameter of rod: 8 mm approx.

Length of pointer: 200 mm

Scale markings: mm

Scale factor: 1 : 50

3. Principle

To determine the linear expansion coefficient

for vari-

ous materials, it is necessary to measure the expansion

for a certain temperature rise

∆

T. Thus the rods are

heated to 100° C by means of steam and the tempera-

ture difference

∆

T from room temperature is calculated.

The expansion is determined from the movement of

the pointer d, where a pointer movement of 50 mm

indicates an expansion of 1mm. The expansion coeffi-

cient is determined from the extension w (scale factor

1:50) and the length of rod l between the two fixed

points by means of the formula:

⋅⋅

lw T

∆

4. Instructions for use

Also required for heating the rods is a vapor generator

or a bunsen burner heating an Erlenmeyer flask

• Attach the end of the rod without the nut to a rub-

ber hose and secure in the spring clip.

• Place the pointer in the notch under the scale and

attach the upper end of the pointer to the rod with

the ring nut.

• Adjust the pointer to zero by sliding the rod.

• Attach to a steam generator or an Erlenmeyer flask

half-filled with water by means of the short glass

rod and a hose.

• Boil water. Steam flows through the test rod and

heats it to approximately 100° C.

1 Spring clip

2 Base track

3 Glass rod

4 Test rods

Pointer

6 Scale

1 2

3B SCIENTIFIC® PHYSICS 1
500 50 78 2

Summary of Contents

Page 1 - 3B SCIENTIFIC® PHYSICS

3Instruction sheet3B SCIENTIFIC® PHYSICSU15405 Linear thermal expansion apparatus3/03 ALF®The apparatus demonstrates the linear expansion ofsolid mate

Page 2 - 500 50 78

4(Note: at high altitudes, water boils at slightly lessthan 100° C.)• When steam has been passing through the rod forabout 1 minute and no more conden

3b-scientific Thermal Expansion Apparatus S User Manual

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3b-scientific Thermal Expansion Apparatus S User Manual

Browse online or download User Manual for Health and hygiene 3b-scientific Thermal Expansion Apparatus S. 3B Scientific Thermal Expansion Apparatus S User Manual [de]

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More documents for Health and hygiene 3b-scientific Thermal Expansion Apparatus S

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