This shows you the differences between two versions of the page.
Next revision | Previous revision Last revision Both sides next revision | ||
demonstrations:4_thermodynamics:4a_thermal_properties_of_matter:sagging_wire:start [2019/02/14 23:33] 127.0.0.1 external edit |
demonstrations:4_thermodynamics:4a_thermal_properties_of_matter:sagging_wire:start [2019/04/26 22:46] demoroom |
||
---|---|---|---|
Line 1: | Line 1: | ||
====== Sagging Wire ====== | ====== Sagging Wire ====== | ||
- | {{tag> needs_review untagged unlocated}} | + | {{tag> lost unlocated}} |
<WRAP box right> | <WRAP box right> | ||
Line 12: | Line 12: | ||
Displays current-created heat and its thermal effect on a wire | Displays current-created heat and its thermal effect on a wire | ||
- | |||
Current flow | Current flow | ||
Power from electricity (P = V*V/R) | Power from electricity (P = V*V/R) | ||
Heat expansion | Heat expansion | ||
- | |||
- | |||
- | |||
- | |||
===== Purpose ===== | ===== Purpose ===== | ||
Line 32: | Line 27: | ||
- | - Nickel wire (currently missing) | + | * Nickel wire (currently missing) |
- | - 200g weight | + | * 200g weight |
- | - Power supply with two leads | + | * Power supply with two leads |
- | - Two stands | + | * Two stands |
Line 42: | Line 37: | ||
- | 1. Tie the nickel wire between the two stands at a considerable distance (The longer the distance, the more sagging will occur | + | - Tie the nickel wire between the two stands at a considerable distance (The longer the distance, the more sagging will occur |
- | 2. Place the weight in the center of the span | + | - Place the weight in the center of the span |
- | 3. Attach the alligator clips of the leads to the ends of the wire | + | - Attach the alligator clips of the leads to the ends of the wire |
- | 4. Flick the power supply switch to 12 volts and turn the knob clockwise to its maximum | + | - Flick the power supply switch to 12 volts and turn the knob clockwise to its maximum |
- | 5. The wire will start sagging to a maximum point | + | - The wire will start sagging to a maximum point |
- | 6. Turn the power off and the wire will return to its original position | + | - Turn the power off and the wire will return to its original position |
===== Notes ===== | ===== Notes ===== |