Lecture Demonstrations Laboratory

Demo Request History

Getting info for CourseID: 5826

PHYS 1060-001: How Things Work

• "I would like to get a ramp, a wagon, a scale that I can hook up to the wagon, and also a scale that sits on the table that I can put stuff on. I would also like something sort of heavy that I can put on the scale on the table. Also, do we still have the wagon without wheels?" - Gordon - narrow wood plank - two large blocks - red cart w/ wheels and without - 5kg mass - green spring scale - 20N & 50N spring scales - bowling ball - baseball

• "I would like to get the ramp back, and the wagon, along with both the spring scales and the green scale. Also, I would like a bowling ball (strictly as a prop)." - Gordon - narrow wood plank - two large blocks - red cart w/ wheels and without - styrofoam piece to prevent 5kg mass from sliding in cart - 5kg mass - green spring scale - 20N & 50N spring scales - bowling ball

• 1. 5-kg weight 2. Wheeless wagon 3. Wagon with wheels 4. 3 steel bars (rollers for the wheeless wagon) 5. Dial spring scale 6. A big wheel I can use to demonstrate how wheels work. 7. A large ball bearing. Camera View. 8. Newton's Cradle - balls hanging from strings. Camera View. 9. The air track that is usually sitting in front of the lab bench.

• 1. Baseball hammer: use two different types of baseballs (attached to handles) to drive in a nail. One is a hardball and the other a softball. 2. Swivel Chair 3. Bicycle Wheel and grinder 4. Dumbbells 5. Air track and assorted sizes of “cars” to use on air track, including ones that stick together with Velcro. In particular, I would like one large and one small car, with and without velcro (it can be on only one end). I want to illustrate elastic and inelastic collisions with one large and one small car. 6. Newton’s cradle 7. Two large pith balls 8. Teflon rod and silk 9. Acrylic rod and Teflon 10. Electroscope

• 1. Two pith balls 2. Teflon rod and silk 3. Acrylic rod and Teflon 4. Electroscope (together with both a conductor and an insulator that I can put on top). 5. Balloons I can stick to the wall. 6. Two clean glass beakers -- 600 or 1000 mL size (about) 7. Scotch Magic tape. 8. Van de Graaff 9. Plastic stool (maybe I don’t need this? I at least want to put the paper-streamer wig on the Van de Graaff). 11. Faraday's ice bucket 12. Sharp needle for van de Graaff

• 1. Two pith balls 2. Teflon rod and silk 3. Acrylic rod and Teflon 4. Electroscope (together with both a conductor and an insulator that I can put on top) 5. Van de Graaff 6. Paper-streamer wig on the Van de Graaff 7. Faraday's ice bucket 8. Sharp needle of van de Graaff

• 1. Teflon rod and silk 2. Acrylic rod and Teflon 3. Electroscope (together with both a conductor and an insulator that I can put on top) 4. Van de Graaff 5. Paper-streamer “wig" on the Van de Graaff 6. Faraday's ice bucket 7. Sharp needle of van de Graaff

• Midterm Exam. No demos.

• 1. Van de Graaff 2. Paper-streamer “wig" on the Van de Graaff 3. Sharp knitting needle for van de Graaff 4. Incandescent and LED based flashlights 5. Car battery with light bulb, knife switch and associated wires 6. Electrostatic Precipitator, prior to finishing up my discussion on electric fields.

• 1. Incandescent- and LED-based flashlights. 2. Car battery with light bulb, knife switch and associated wires. 3. short circuit (nichrome wire) for the car battery circuit 4. 3 D-cell battery circuit with lightbulb (I want to be able to flip one of the batteries backward). I’m also going to do the resistance model, but I’m going to use your great video for that, I definitely don’t need to do that one live. (I love the slow motion segment).

• 1. The "diode demonstrator” from last week. 2. Two bar magnets on swivels 3. One bar magnet to hold 4. One pre-broken bar magnet 5. Some strong magnets to jump at one another 6. Barkhausen Effect demo 7. Steel, copper, and aluminum (some materials are ferromagnetic, others are not) I’m also going to use your video: 5H1031-Magnetic-Fields-Matrix-Iron-Rods-LD I am considering doing some stuff visualizing magnetic fields with iron filings, ie. something with a refrigerator magnet.

•  video  - Capacitor Discharge
•  video  - Back EMF in an Inductor
•  video  - Electromagnetic Radiation

• 1) the “power distribution” demo, where one uses a step-up and a step-down transformer to overcome losses in a transmission wire. 2) The jumping rings demo. I mostly want it as a demo of transformers. 3) The “transformer” demo along with the Jacob’s ladder. I probably will not do the melting nail. 4) The two super conducting demos (the levitating magnet, and the traveling puck).

• The five demos I would like to do live are: 1) A long bungy cord or long spring that I can use to demonstrate the propagation a wave (as well as standing waves). 2) Transverse waves, I just want that weird thing with the “levitating sticks”. It appears in the video. I guess they are the “Pasco wave sticks”. 3) Back EMF of an inductor, I just want the Big Horn magnet, not the other thing. 4) Capacitor discharge. I just want to charge that big capacitor and short it with a screw driver. 5) Electromagnetic Radiation. Those two antennae, one of which has a light bulb. I also requested four of these on the demo web site, but since I am not really sure how that works, I am listing them here anyway. I am including a screen shot below ... I am also going to use your videos of 1) microwave experiments, 2) resonance wire ring and 3) Forced oscillations. I don’t want to do these live.

•  video  - Transverse Waves
•  video  - Capacitor Discharge
•  video  - Back EMF in an Inductor
•  video  - Electromagnetic Radiation

• Finish microwave ovens with discussion on the Lorentz force as related to the magnetron and use the e/m Tube Lorentz Force Demonstrator video. The next section is on light. 1) Bulbs or lamps with different color temperatures (notably tungsten and sunlight), Lou, I believe used three, one incandescent, one LED and one compact fluorescent. Can I turn on an incandescent bulb and run it at different currents to see the color change? 2) Rainbows - “Rainbow II” maybe project onto one of the walls of the classroom and use the other camera to view it? 3) I actually don’t have a 3rd, but I was looking for something (beyond bulbs) for blackbody radiation. I did not see anything obvious, but I just wanted to ask in case I might be missing something.

• I am going to stick with the bulbs from Monday, but I am also going to make judicious use of both your "Sunset" video and a small portion of the "Optics" video.

• 1. I would like to repeat the prism/rainbow demo that I did a few lectures back. 2. If possible I would like to do the polarization demo where we look at the glare off the lab table, with polarizers. I don’t know if this is possible with our current setup, but I think being able to show a reflection turning on and off as they see you rotating a sheet of polarizer is a great way to make the effect real. 3. I want to repeat the long spring clamped at one end (to demonstrate standing waves). 4. I would like to show spectral lines with thenNeon, helium and mercury vapor discharge tubes. I don’t want to do phosphors for now. Again, I am not sure of what is feasible in 205. I am also going to use your soap-bubble interference videos.

• 1. Long spring clamped at one end (to demonstrate standing waves) 2. Neon, Helium, Mercury vapor discharge tubes, along with a diffraction grating. 3. The long skinny incandescent bulb you mentioned. 3. Phosphors and other fluorescent things 4. UV flashlight 5. Fluorescent lamp with phosphor missing 6. Mercury discharge lamp 7. Sodium discharge lamp

• 1. Neon, Helium, Mercury vapor discharge tubes, along with a diffraction grating. 2. The long skinny incandescent bulb you mentioned. 3. Phosphors and other fluorescent things 4. UV flashlight 5. Fluorescent lamp with phosphor missing 6. Mercury discharge lamp 7. Sodium discharge lamp 8. Colored LEDs and a power supply for them

• 1. Colored LEDs and power supply for them 2. Laser and grating collection 3. Visible (opened) laser, ... On item 1, I would like to demonstrate again how current flows in one direction, but not both directions. I cannot remember if this is the same setup as I used for the LEDs. If not, I guess I want an additional demo. If you have any other demos that you think might be good for semiconductors in general, and LEDs in particular, I would love to hear your thoughts on them.

• 1. Photoresists/photoconductor 2. Passive foot-candle lux meter 3. Colored LEDs and power supply for them . 4. Laser and grating collection (I really liked the dual laser pointer with the grating!) including the multiple slits/grating on the screen in front of the room. 5. Visible (opened) laser (if you think such a demo would work, and we have something). This last is not particularly important. 6. Also, I would like a geiger counter and some radioactive stuff. For this, it might be best if we use one that has a speaker to hear clicks that (hopefully) will be picked up by my microphone.

• Geiger counter
• Spark Detector for Alpha Particles

• no demos