3B SCIENTIFIC PHYSICS U15405 Manual Del Usuario página 4

(Note: at high altitudes, water boils at slightly less
than 100° C.)
• When steam has been passing through the rod for
about 1 minute and no more condensing steam is
emerging from the end of the rod, read off the larg-
est movement of the pointer.
5. Example calculation
Room temperature T = 22°C
1
Temperature of steam = 100° C
3B Scientific GmbH • Rudorffweg 8 • 21031 Hamburg • Germany • www.3bscientific.com • Technical amendments are possible
Temperature rise ∆ T= 78° C
Pointer movement for copper rod d = 32.5 mm
Extension w = 50
Length of rod l = 500 mm
32 5 .
α =
= 16,7 · 10
⋅ ⋅
500 50 78
Table of values:
-6
Copper: 16.8 · 10 /° C
Iron: 12 · 10 -6 /° C
-6
Glass: 9 · 10 /° C
4
–6
/° C