Coke and Chemistry Like the two previous scientists to head the experiment, White has had to learn a stoic patience when it comes to pitch. 0000001656 00000 n
Licopodium powder (especially) or even flour works a lot better for the fireball trick. The fluidity threshold of coal pitch is determined, and the influence of heat treatment on this temperature is studied. www.thinkgeek.com is reselling a goo they labeled "smart mass." 0000006095 00000 n
Did michael read his "glass is not a fluid" link? Using the same density as previously, this gives for the kinematic viscosity: Is it even the case that all centuries old glass is thicker at the bottom, as opposed to along some other axis? This viscosity behaviour with increasing temperature is important for the spinning of mesophase, for the infiltration of carbon fibre preforms and especially for the sintering of pressed mesophase powders. However, glass being a liquid or a solid is a different question to 'does it flow'. C Apparent Viscosity. Topl. Do the math. Just because something is written in an article, does not make it correct. This discussion has been archived. Lapina, N.A., Ostrovsky, V.S., Averina, M.V., et al., Thermochemical and structural transformations of coal tar pitch during its coking, Koks Khim., 1975, no. Since its last drop, there's now a big long tail from the drop to the funnel. 24 0 obj
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It can't be too hard to generate MPEGs automativally and have the latest available for download. In light of the confusion about how many drops have actually fallen, and when they fell, I propose the experiment be restarted. I can't see it on the movie! The viscosity, wetting properties, and fluidity threshold of coal and other pitches are considered. I remember the pitch glacier too, and I guess it was undustable (a 100-year-old layer of dust having just sunk into its surface). 6–8. Droplet formation time will vary accordingly. In Imperial or US customary measurement system, the density is equal to 71.98 pound per cubic foot [lb/ft³], or 0.6665 ounce per cubic inch [oz/inch³] . Coal tar pitches exhibit negligible departure from Newtonian behavior, except near the softening point, and thus differ from aromatic petroleum residua (King and Robertson, 1973 b). The relation between the viscosity of pitch and its composition, wetting properties, and mass loss on heating to 360°C is analyzed. According to The Pitch Drop Experiment website, this particular piece of pitch is 100 billion times more viscous than water. The susceptibility of pitch viscosity to temperature is calculated from values determined at two or more temperatures (Evans and Pickard, 1931; Bowitz et al., 1963). He’s trained three web cameras on it, each with independent power sources, and is beaming the watch out on the Internet 24/7. The viscosity decrease is a net physical effect and reversible. It would just look like any other fluid dripping out of something over time-lapse. Viscosity is the measure of a fluid’s resistance to flow, or in scientific terms, of the internal friction given it by its molecular makeup.