DCS # | DEMONSTRATION | REFERENCE | ABSTRACT |
4B50.00 | Heat Transfer Applications | | |
4B50.10 | four thermos bottles | PIRA 500 | |
4B50.10 | four thermos bottles | 4B50.10 | Monitor the temperatures of water in four thermos bottles with different combinations of vacuum and silvering. |
4B50.10 | thermal properties of dewars | Hd-3 | Temperatures are recorded for cooling of four thermos bottles of different construction. |
4B50.10 | insulation (dewar flasks) | Disc 14-26 | Hot water is placed in the four thermos bottles. |
4B50.11 | bad dewar | H-167 | Evacuate a unsilvered dewar, pour in liquid air, let air into the space, see frost form. |
4B50.15 | four thermos bottles - LN2 | H-166 | Pour liquid air into four thermos bottles to sort out conduction, convection and radiation. |
4B50.20 | boiling water in a paper cup | PIRA 200 | Burn one paper cup, boil water in another. |
4B50.20 | boil water in a paper cup | 4B50.20 | Fill a KFC bucket 1/8 full of water, boil the water with a Bunsen burner, and burn away the top part of the bucket with a propane torch. |
4B50.20 | insulation with asbestos | Hd-4 | Fight asbestos abatement. Two identical cans of water, one wrapped with asbestos, cool. |
4B50.20 | radiation from different surfaces | 38-5.1 | Three cans, black, asbestos covered, and shiny, are filled with boiling water and left to cool. |
4B50.20 | surface radiation | H-157 | An asbestos paper covered can cools faster than a shiny can. |
4B50.20 | boil water in a paper cup | H-147 | Boil water in a paper container. |
4B50.20 | boiling water in a paper cup | Disc 14-19 | Burn one paper cup, boil water in another. |
4B50.25 | water balloon and matches | PIRA 1000 | |
4B50.25 | balloon and matches | 4B50.25 | |
4B50.25 | insulators | H-127 | Show commercial insulating materials. Heat a penny red hot on your hand protected by 1/2" rock wool. |
4B50.25 | water balloon heat capacity | Disc 14-20 | Pop a balloon with a flame, then heat water in another balloon. |
4B50.30 | Leydenfrost effect | PIRA 1000 | |
4B50.30 | Leyden frost phenomenom | Disc 14-22 | Drop water on a hot plate, liquid nitrogen on the lecture table. |
4B50.31 | spheroidal state | H-136 | A nugget of silver heated red and plunged into water does not cause immediate boiling. |
4B50.32 | spheroidal state | H-134 | A drop of water suspended from a glass tube above a hot plate is stable until the plate cools. |
4B50.32 | Leyden frost effect | H-105 | Pour liquid air on your hand or roll it about on the top of your tongue. |
4B50.33 | Leyden frost phenomenom | AJP 46(8),825 | Four demonstrations: floating liquid drops on their own vapor, delayed quenching, Boutigny bomb, and stick your finger in boiling oil. |
4B50.35 | finger in hot oil | PIRA 1000 | |
4B50.35 | finger in oil | 4B50.35 | Heat oil in a beaker, cut a potato and cook a french fry, then wet you finger in a beaker of water and stick it in the hot oil. |
4B50.35 | spheroidal state | H-135 | A wet finger can be dipped into molten lead. |
4B50.40 | reverse Leyden frost | PIRA 1000 | |
4B50.40 | reverse Leyden frost | 4B50.40 | |
4B50.40 | reverse Leyden frost effect | H-106 | Place a brass ball into liquid air in a clear dewar and observe the initial leidenfrost effect. When the ball is cold, place it in a flame and observe the reverse leidenfrost effect as frost forms on the ball while it is in the flame. |
4B50.60 | greenhouse effect | PIRA 1000 | |
4B50.60 | greenhouse effect | H-153 | The temperature of a closed bottle in direct sunlight is compared to the ambient temperature. |
4B50.61 | greenhouse effect chamber | AJP 41(3),443 | A chamber with interchangeable windows and provisions to introduce CO2. |
4B50.62 | radiation and convection | H-165 | Put a hot metal object in a smoke filled projection cell and the smoke will be repelled by radiation pressure. Convection will cause an upward clearing. |
4B50.70 | Davy lamp | Hd-7 | A Bunsen burner will burn on top and bottom of two copper screens a few inches apart. |
4B50.70 | Davy safety lamp | H-126 | Show that a Bunsen burner flame will not strike through to the other side of fine copper wire gauze. Direct a stream on gas at a lit Davy safety lamp. |
4B50.80 | conduction and convection - Pirani | H-146 | The basic principles of the Pirani vacuum gauge. Heat a platinum wire in a flask until it glows dull red, then evacuate the flask and the wire will glow more brightly at the same voltage. |
4B50.90 | forced air calorimeter | TPT 28(6),420 | Fans on either side of a 48 quart styrofoam cooler create a forced air calorimeter used in this example to measure the heat produced by a candle. |