flinnsci.com PHYSICS & PHYSICAL SCIENCE HEAT AND THERMODYNAMICS
401
Heat and Thermodynamics, continued
Hand Boiler See page 456.
Pulse Glass See page 456.
Density Box—
Demonstration Kit
By: David A. Katz, Retired, Wilmington, DE
The demonstration apparatus is a clear acrylic chamber that is divided down the
middle with a removable wall. Hot, red water is placed on one side of the chamber
and cold, blue water on the other. The center dividing wall is then carefully removed,
allowing the two solutions to mix. The two different-temperature solutions very
dramatically separate with the hot, red water on top and the cold, blue water on
the bottom. A great demonstration when discussing convection currents, air turbulence
and water turnover in lakes and ponds. Includes instructions and teaching
information.
See free video at flinnsci.com.
Catalog No. Description Price/Each
AP4784 Density Box—Demonstration Kit $39.10
Convection of Liquids Tube
Dramatically demonstrate the motion caused by the convection in a liquid. Fill this
glass apparatus with water, then introduce a dye at the top. Heat one of the lower
corners, and watch as the dye follows the path of the convection current. Apparatus
is glass and measures 15 x 20 cm. Food dye is available separately. Includes instructions,
a detailed discussion and a reproducible worksheet.
Catalog No. Description Price/Each
AP6053 Convection of Liquids Tube $35.65
V0003 Vegetable Dyes 6.15
Convection/Ventilation Box
Place a lighted candle under one chimney, then use a smoke source over the other
chimney to reveal the flow of convection currents. The consequences of ventilation
can also be shown by covering the chimneys and removing, in various combinations,
the corks in the side panels. The apparatus consists of a 22 x 9 x 10 cm metal box
with a glass front panel, two chimneys, a candle, and complete instructions. The
demonstration requires a smoke source, such as Touch Paper.
Catalog No. Description Price/Each
AP6028 Convection/Ventilation Box $80.80
HEAT AND THERMODYNAMICS continued on next page.
Cold Hot
Convection/
Ventilation Box
AP6028
Convections of Liquids Tube
AP6053
Ice Melting Blocks
AP6488
Ice Melting Blocks
Place an ice cube on each block and watch as one ice cube rapidly melts. Which
block melts the ice cube—“cold” or “warm?” Students will be amazed when they see
the “cold” block melting the ice cube remarkably faster than the “warm” block. How
is this possible? The “cold” block is a heat conductor—it easily transfers heat energy.
The “warm” block is an insulator. Instructions provided. Block dimensions: 10 x 10 cm.
Catalog No. Description Price/Each
AP6488 Ice Melting Blocks $27.75
Radiation Can Set
Dark surfaces absorb radiation more than light ones. Here’s an easy experiment to
prove it. Just fill the two cans with water. Put thermometers in the holes in the tops
and heat the cans equally with an infrared lamp. The difference in temperature rate
increase will be dramatic. Except for the finish, these two cans are identical. One has
a bright silver metallic finish and the other is dull black. The screw top makes water
addition and removal convenient. Set contains one of each can type and experiment
suggestions. Infrared lamp available separately.
Catalog No. Description Price/Each
AP5960 Radiation Can Set $19.40
Radiation Can Set
AP5960
Hot
Cold
Density Box—Demonstration Kit
AP4784
Before
After
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