| DCS # | DEMONSTRATION | REFERENCE | ABSTRACT |
|---|
| 4A30.00 | Solid Expansion | | |
| 4A30.10 | bimetal strip | PIRA 200 | Strips of dissimilar metals bonded together bend when heated. |
| 4A30.10 | bimetal strip | 4A30.10 | A bimetal strip of brass and steel is heated in a Bunsen burner flame. |
| 4A30.10 | bimetal strip | Ha-5 | Strips of dissimilar metals bonded together bend when heated. |
| 4A30.10 | bimetallic strip | 25-2.2 | A pointer is mounted on the end of a bimetallic strip. Picture. |
| 4A30.10 | bimetal strip | H-21 | Two 25 cm strips of brass and invar steel are welded together for use as a bimetal strip. |
| 4A30.10 | bimetallic strip | H-2a.5 | Just a picture. |
| 4A30.10 | bimetallic strip | Disc 14-08 | Heat the commercial bimetallic strip in a flame. |
| 4A30.11 | thermostat model | PIRA 1000 | |
| 4A30.11 | thermostat | Ha-6 | A small bimetal strip acts as a switch in a thermostat. |
| 4A30.11 | bimetallic strip thermostat | H-22 | Set up a bimetallic strip thermostat to ring bells or flash lights. |
| 4A30.11 | thermostat model | Disc 14-09 | A bimetallic strip bends away from an electrical contact when heated turning off a light. |
| 4A30.12 | turn signal oscillator | AJP 55(10),954 | Two types of turn signal oscillators that use bimetal strips are discussed. |
| 4A30.15 | wire coil thermostat - zig | PIRA 1000 | |
| 4A30.20 | balls and ring | PIRA 200 | A ring with a set of two balls, one over and one under size. Heat the ring and lslip over both. |
| 4A30.20 | balls and ring | 4A30.21 | |
| 4A30.21 | ball and ring | Ha-7 | A ball passes through a ring only when it is heated. |
| 4A30.21 | ball and ring | H-15 | A ball passes through a snugly fitting ring when both are at the same temperature. |
| 4A30.21 | ball and ring | H-2a.4 | Just a picture. |
| 4A30.22 | thermal expansion | Disc 14-11 | A brass plate with a hole is heated until it fits over a ball. |
| 4A30.23 | shrink fit | H-16 | Heat a brass ring and slip it onto a slightly tapered steel bar and pass around the class. |
| 4A30.30 | break the bolt | PIRA 500 | |
| 4A30.30 | break the bolt | 4A30.30 | Heat a iron bar, then tighten it in a yoke so it breaks a cast iron bar when the bar cools. |
| 4A30.30 | forces caused by change of length | Ha-10 | A heavy iron bar heated and placed in a yoke breaks a cast iron bolt as it cools. |
| 4A30.30 | break the bolt | H-17 | A heated bar is tightened in a yoke against a cast iron peg which breaks as the bar cools. |
| 4A30.30 | pin breaker | Disc 14-10 | Heat a rod to break a 1/8" diameter pin by expansion. |
| 4A30.31 | break the bolt | H-18 | A drill rod clamped between a inner steel rod and an outer brass tube breaks when the brass tube is heated. Diagram. |
| 4A30.40 | hopping discs | PIRA 1000 | |
| 4A30.40 | hopping discs | Ha-11 | Bimetal discs hop on guide wires between hot and cold plates. |
| 4A30.45 | bending glass by expansion | H-13 | One edge of a strip of plate glass is heated with a Bunsen burner causing the glass to bend toward the cooler side. |
| 4A30.46 | Trevelyan rocker | H-24 | A brass or copper rocker heated and placed on a lead support will rock due to expansion of the lead. Diagram. |
| 4A30.50 | expansion of quartz and glass | PIRA 1000 | |
| 4A30.50 | expansion of quartz and glass | 4A30.50 | |
| 4A30.50 | expansion of quartz | Hd-8 | Quartz and glass tubes are both heated with a torch and plunged into water. |
| 4A30.50 | expansion of quartz and glass | H-25 | Heat a piece of quartz tube and quench it in water. Try the same thing with Pyrex and soft glass. |
| 4A30.55 | expansion of a tube | Ha-8 | Steam is passed through an aluminum tube and a dial indicator shows the change in length. |
| 4A30.55 | expansion tube | H-12 | One end of a tube rests on a needle attached to a pointer that moves as the tube is heated. |
| 4A30.60 | sagging wire | PIRA 500 | |
| 4A30.60 | sagging wire | 4A30.60 | |
| 4A30.60 | sagging wire | H-9 | Heat a length of nichrome wire electrically and watch it sag. ALSO - Recalescence temperature of iron (800 C). |
| 4A30.60 | linear expansion of a wire | H-2b | A wire is heated electrically and a pointer indicates change of length. Also recalescence of iron. |
| 4A30.60 | thermal expansion of wire | Disc 14-07 | A long iron wire with a small weight hanging at the midpoint is heated electrically. |
| 4A30.61 | expanding wire | H-10 | One end of a heated wire is passed over a pulley to a weight. The pulley has a pointer attached. |
| 4A30.65 | bridge expansion | H-14 | Either the wire or the roadway can be heated in this model of a suspension bridge. |
| 4A30.69 | gridiron pendulum | H-23 | A gridiron pendulum of constant effective length when heated is made of tubes of brass and zinc. |
| 4A30.80 | heat rubber bands | PIRA 1000 | |
| 4A30.80 | heat rubber bands | 4A30.80 | |
| 4A30.80 | heat rubber bands | AJP 31(5),397 | 1) Pass out rubber bands, have the students stretch them while holding against lips, then wait and reverse for cooling. 2) Hang a 1 kg mass from four rubber bands so it touches the table, heat 20 sec with a heat lamp and the mass will lift 1 cm. |
| 4A30.80 | thermal properties of rubber | Hm-4 | Rubber tubing inside a copper shield contracts as it is heated. |
| 4A30.80 | heat rubber | H-19 | Hang a 100 g weight from a rubber band and heat with a radiant heater. Or, enclose a rubber tube in a brass cylinder and heat with a Bunsen burner. |
| 4A30.80 | rubber band on lips | H-173 | Pass out rubber bands for the students to put on their lips to feel the change in temperature as they stretch and unstretch. |
| 4A30.82 | heat rubber | H-20 | A complex apparatus that oscillates as a rubber band is heated and cooled. |