GRAVERSANDE BALL AND RING
concrete demostration of the cubic expasion of a solid. Ring with wooden handie
and ball on chain.
BAR BREAKING APPARATUS
Demonstrates the effect of contraction of a solid.
Heavy cast iron construction. Complete with 12 breaking bars.
Spare parts for 4200.29:
Set of 12 metal breaking bars
moving over scale reading 0-90° shows the expasion of a metal rod when heated.
Complete with three different metal rods and trough for alcohol. Mounted on
metal base with dimens . 280 x 80 mm.
how the unequal expansion of different metals may be used for practical
applications (principle bimetallic thermostats , switches, etc). A Bunsen burner
or alcohol lamp is required for the heating of the bar.
Stainless steel boiler with hermeticallysealing lid on which are mounted a
Bouredon pressure gauge (from 0 to 2.5 atmospheres ), one safety valve, one
gravity-operated safety valve, and a thermometer housing. The boiler is used to determine the temperature
Accesory for 4205.20:
to + 250°C (cat. 2240.25)
CHARLES'S LAW APPARATUS
For the verification of relationship of the expasion of a gas at constant
pressure and the increase in temperature (Gay-Lussac's law). Includes : three -
limb glass tube with one limb graduated terminating in glass bulb ; a glass
vessel with PVC lid; metal stirrer; two Mohr clips.
Accessories and spare parts for 4210.60:
Three-limb glass tube,
- 10°C to + 100°C x 1°C (cat.2240.15)
INGENHOUSZ CONDUCTIVITY APPARATUS
for the qualitative comprarison of the thermal conductivity of various
substances in the from of bars protruding from a pan to which a heat source (hot
water) is applied . A layer of wax is applied to the rods which are then heated
by filling the pan with hotwater. The different thermal coductivities of the
rods are shown by the varying rates at which the wax meltes.
the different thermel conductivity of three metal rods.
DEWAR FLASK CALORIMETER
- Dewar vacuum vessel, capacity 500 ml (cat.4230.51)
-Cylindrical resin housing for insulation of the vacuum vessel (cat. 4230.53)
- Plastic lid with stirrer and thermometer
Supplied without thermometer (see cat. 2240.36)
for the study of joule's law (see cat. 4670.00).
SPECIFIC HEAT CYLINDERS
of six cylinders of equal diameter (16 mm ) and mass (100 g) in aluminum, iron,
brass, lead, copper, and zinc.
MECHANICAL EQUIVALENT OF HEAT APPARATUS
Results with error under 10%
The simple apparatus is historically important, allows for the correlation of
several fundamental concepts, yields accurate results, and can be applied in
group work. The apparatus
basilically consists of a calorimetric body containing water, wound with a fibre
cord on which is hung a known mass. A thermometer with 1/10°C divisions is used
to measure the temperature of the water. When the calorimeter is rotated, the
mass is suspended by the force of
friction, and the weight of the mass. The calculation of the mechanical
equivalent of heat is made on the basis of the weight applied, the number of
rotations made by the calorimeter, the volume of water in the calorimeter, its
temperature increase, and the constants of the apparatus. Experimental
measurements result in :
Which agrees, within the limits of expermental error, with the expected value K
J 4.185 Joule/calorie.
Accessories for 4235.10
Mass of 5 kg (cat.411.26)
Thermometer , range-10°C to + 50°C.
1/10°C (cat. 2240.30)