Use code RJTJFG for 20% off at checkout. Until 5/31/20
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The watermark at the lower right corner of the image will not appear on the final product.
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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.
This image of a proton-photon collision was obtained with a bubble chamber at the Stanford Linear Accelerator Center (SLAC), showing the collision... more
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This image of a proton-photon collision was obtained with a bubble chamber at the Stanford Linear Accelerator Center (SLAC), showing the collision between an hydrogen nucleus (proton) and a high-energy photon. The collision has taken place in the area at center right; the track of the photon is not visible because only charged particles leave tracks in a bubble chamber. Nine particles (in red) are seen branching from the collision site heading towards the bottom of the image. The tight spirals scattered in the frame are electrons whose trajectories are strongly curved by the magnetic field of the bubble chamber. The high-energy photon was produced by allowing SLAC's 2-mile electron beam to strike a target, releasing the photon. Designed as a 20-Bev. machine, the 21 Bev. accelerator also exceeded its design intensity of 50 milliamperes on the weekend of December 7th, 1968.
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