PIRA 4B30.00 CONDUCTION

DCS #DEMONSTRATIONREFERENCEABSTRACT
4B30.00Conduction
4B30.10conduction - dropping ballsPIRA 500
4B30.10conduction - dropping balls4B30.10Waxed balls drop off various metal rods connected to a heat source as the heat is conducted.
4B30.10conduction of heatHd-1Waxed balls drop at different times from rods attached to a common heat source.
4B30.11conduction - dropping ballsH-3a.1The center of a star configuration of five different metal bars is heated to melt wax at the far ends, dropping balls.
4B30.12conduction - melting waxPIRA 1000
4B30.12thermal conductivityDisc 14-21Dip rods in wax, then watch as the wax melts off. Time Lapse.
4B30.15melting paraffin - sliding pointerPIRA 500
4B30.15sliding pointersH-124Vertical rods of different metals are soldered onto the bottom of a vessel filled with boiling water. Pointers held by some paraffin slide down as the rods heat. Diagram.
4B30.20painted rodsPIRA 1000
4B30.20conduction of heatHd-2Rods of different material are coated with heat sensitive paint and attached to a common heat source.
4B30.20painted rods26-3.3Steam is passed through a manifold with heat sensitive paint coated rods of different materials.
4B30.21conduction barsH-122Relative conductivities of bars of metals in a common copper block are indicated by match head ignition or temperature indicating paint.
4B30.22iron and copper strips26-3.8Iron and copper strips are coated with "thermal color" and heated at one end.
4B30.25four rods - heat conductionPIRA 1000
4B30.25four rods - heat conduction4B30.25
4B30.30copper and stainless tubesPIRA 1000
4B30.30copper and stainless tubes4B30.30A contest is held between people holding copper and stainless tubes in twin acetylene torch flames.
4B30.31poor thermal conduct. of stainless sHd-5Heat a stainless tube with a blow torch until it is white hot and hold close to the hot spot.
4B30.31stainless rod26-3.4Heat one end of a stainless steel rod white hot while holding the other end.
4B30.32iron and aluminum rods26-3.2A student holds iron and aluminum rods in a burner flame.
4B30.35toilet seatsPIRA 1000
4B30.35toilet seats4B30.35
4B30.40wood and metal rodH-129Wrap a paper around a rod made of alternating sections of wood and metal and hold in a flame.
4B30.41high conductivity of copperH-130Hold a burning cigarette on a handkerchief placed over a coin.
4B30.42matches on hot plates26-3.1Matches are placed on plates of two different metals over burners.
4B30.50heat propagation in a copper rodPIRA 1000
4B30.50heat propagation in a copper rod4B30.50
4B30.50propagation in a copper rod26-3.7Solder a copper-constantan thermocouple into a copper rod and thrust the end into a flame.
4B30.51spreading heatwave26-3.10An aluminum bar has a series of small mirrors mounted on small bimetallic strips to allow projection of the curve of the temperature in the bar as it is heated. Construction details in appendix, p.1287.
4B30.52dropping penniesH-123Pennies attached with wax will progressively drop off a bar as a Bunsen burner heats one end.
4B30.53liquid crystal indicatorAJP 41(2),281Liquid crystal indicator from Edmund Sci. was bonded to a strip and a plate of metal and the resulting color change compared well with a computer generated model.
4B30.53temperature indicating paperH-125A copper bar is placed on temperature indicating paper and one end is heated.
4B30.54heat transferHd-6A solid copper rod has holes bored to pass steam and cold water from the same end. Thermometers along the rod measure the heat transfer into the water.
4B30.56anisotropic conductionH-128Conductivity is greater along the grain in wood and crystals. Heat the center of a thin board covered with a layer of paraffin and watch the melting pattern.
4B30.58thermal vs. electrical conduction26-3.9A rod is fabricated with end sections of copper and a center section of constantan. Temperatures along the rod when heated differentially are compared with voltages along it while a potential is applied.
4B30.59electrical analog of heat flowAJP 36(2),120A circuit that gives the electrical analog of heat conduction.
4B30.60heat conductivity of waterH-131Boil water in the top of a test tube while ice is held at the bottom.
4B30.61heat conductivity of waterH-132The bulb of a hot air thermometer is placed in water and a layer of inflammable liquid is poured on top and burned.
4B30.65heat conduction in gasesH-133Small double walled flasks are filled with ether, the jackets contain different gases. When placed in boiling water, the height of ether flames varies.
4B30.66heat conductivity of CO2AJP 29(8),549Author tried using dry ice to cool break the bolt. Nothing happened.
4B30.71conduction of heat in a lampA-61A carbon filament lamp is filled with different gases at various pressures and the brightness of the filament observed.
4B30.72glowing tubes27-5.1Filaments in Pyrex tubes containing air, flowing hydrogen, and hydrogen at reduced pressure glow with different intensities. Picture.
4B30.73double glow tube27-5.2A single length of Nichrome wire runs through two chambers allowing comparison of thermal conductivity of two gases and variation of pressure.

ReferenceDescription
M-1Sutton
Ma-1Freier & Anderson
M-1dHilton
8-2.8Meiners
1A12.01University of Minnesota Handbook
AJP 52(1),85American Journal of Physics
TPT 15(5),300The Physics Teacher
Disc 01-01The Video Encyclopedia of Physics Demonstrations

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