Sep 6, 2021 · At raves, nightclubs, and parties, sometimes there are "cold fireworks" machines that spew out a dense bunch of really bright sparks. The odd thing is that these …

Oct 31, 2016 · Sparks are tiny pieces of material that are hot enough to produce visible light. With fire, it is tiny particles of burning wood. In welding, it is the superheated welding material. …

It's too bad the OP wants to AVOID getting shocked. One of the most fun demos in my physics classroom involves deliberately letting a Van de Graaff generator "throw" 3 inch to 6 inch …

3 If I wander outside in cold weather for 10-20 minutes my body accumulates charges. I get electric shock if I touch metal, e.g., door knob, car door etc. Now I've two questions: Why does …

Jan 5, 2018 · I doubt that you can see sparks only when the spark material burns in air. I even remember that as a child hitting two stones together produced sparks that were visible in the …

12 Grinding steel produces sparks. Grinding aluminium does not. Why? I found this article about why grinding steel produces sparks but would like to confirm if it is true. I would also like to …

Feb 12, 2018 · If you put your hand flat on an aluminium engine block at the same temperature you would get burned. The same thing applies to the sparks from a grinder or firework …

I have learnt that depending on the various gases those are involved in the reaction that produces fire, different colors (yellow, red or blue) of flames become visible. I have a question .. what ...

Jun 11, 2013 · Obviously wires heat up too, but why do they heat up? And for the same reason, why do we get electrical burns?

Aug 14, 2015 · What causes two objects sliding against each other to produce heat? Why don't they generate visible light or something else?