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by Science Source
$17.00
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The Center for Disease Control has recommended the use of cloth face masks to help fight the spread of COVID-19.
This face mask is made from 100% polyester and includes two ear loops with adjustable grommets for a comfortable fit.
The printed area of the mask is approximately 7" wide by 5" tall. This mask fits well on adult mens' faces without the grommets but, due to the adjustable grommets, can be worn snuggly by adult women, as well.
Please note - this is NOT a surgical grade mask. It is not intended for any medical or commercial uses, whatsoever. It is a simple, cloth mask designed for everyday use to cover your mouth when out in public. The mask should not be used in any medical or surgical setting.
We make no warranties that the mask prevents infections or the transmission of viruses or diseases.
Design Details
In 1947 during a study of cosmic ray interactions, a product of a proton collision with a nucleus was found to live for much longer time than... more
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In 1947 during a study of cosmic ray interactions, a product of a proton collision with a nucleus was found to live for much longer time than expected 10 -10 seconds instead of the expected 10 -23 seconds. This particle was named the lambda particle (?0) and the property which caused it to live so long was dubbed "strangeness" and that name stuck to be the name of one of the quarks from which the lambda particle is constructed. The lambda is a baryon which is made up of three quarks an up, a down and a strange quark. This photograph is from a liquid hydrogen bubble chamber at Brookhaven National Laboratory. The yellow line at the bottom is an incoming high-energy proton, it collides with a proton at rest in the liquid hydrogen creating a slew of particles. Seven positive pions, a proton, and a positive kaon (shown in red) curve off to the right, while seven negative pions (blue) move to the right. A neutral lambda is also produced which travels upwards undetected and then decays into a...
$17.00
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