1 Symptoms are due to the effects of excess acetylcholine on nicotinic and muscarinic acetylcholine receptors in the CNS, at neuromuscular junctions, and in the sympathetic, and parasympathetic nervous systems. 2  Nicotinic and muscarinic receptors have different. 3  Functions.
We're taking here about mains voltage (say 120 V or 230 V AC) power supplies with power ranging from a few Watts to several hundred Watts. Switch mode power supplies are everywhere; here are some pictures of their guts. The big high power components and small heat sinks are typical of SMPS. These devices are incredibly reliable, but being very often left powered all the time (even when their load is switched off), they still are the weak link.
Sodium has a density of only about 0.97 g/mL, so it floats on water. The reaction produces jets of hydrogen gas below the waterline; this is what propels the sodium around the surface. The reaction releases heat, and as the sodium and the solution warm up, the reaction goes faster and faster. If the sodium gets trapped on the water's edge or against some other obstacle, enough heat can be generated to boil the water around the metal and actually melt the sodium. This is a dangerous reaction. If the sodium gets hot enough, the hydrogen jets can ignite and burn.