3B Scientific Pressure Container for Determining Weight of Air - Manual

3B SCIENTIFIC
®
PHYSICS
1
Pressure capsule for determining weight of air
8412150
Instruction sheet
02/06 ALF
1 Inlet valve
2 Pressure capsule
3 Outlet valve
4 Hose
1. Description
The pressure capsule is designed for demon-
strating the weight of air and determining its
density by means of comprerssion.
It is a metal capsule with a cycle valve so
that air can be pumped in and an outlet valve
at the other end.
2. Technical data
Dimension: 190 mm x 60 mm Ø
Mass: 100 g approx.
3. Operation
The following additional equipment is re-
quired to complete the experiment:
1 Compressed air pump 8411210
1 Electronic scales U42048
1 500 ml measuring cylinder
1 Glass tube
1 Glass tubing, right angled
2 Rubber stoppers with hole
1 Rubber stopper without hole
1 Stand base 8611160
1 Universal clamp U13261
1 Universal sleeve U13255
1 Stand rod U15011
• Mass m
1
weigh the pressure capsule us-
ing scales before starting the experiment.
• Fill the pressure capsule with air, pump-
ing the piston 5-7 times.
• Mass m
2
weigh the capsule again after it
has been filled.
• The difference m
2
– m
1
gives the mass m
of the air that has been pumped in.
• Set up an experiment as in Fig. 1 to de-
termine the volume of air.
• Close the glass test tube by means of a
rubber stopper with a right-angled length
of glass tubing passed through its hole.
• Plug the other end of the glass tube with
the other stopper and connect a hose to
the capsule through it.