Ian Robinson, head of the National Physical Laboratory’s engineering measurement division said, “One key reason for doing this work is to provide international security. If the Pavillon de Breteuil” — where the IPK is stored — “burned down tomorrow and the kilogram in its vaults melted, we would have no reference left for the world’s metric weights system. There would be chaos. The current definition of the kilogram is the weight of that cylinder in Paris, after all. And that’s just not good enough for international science.” [x]
What is happening here is the water is allowed a steady flow without any change in pressure. It’s like an open top container with a lot of water in it so the hole doesn’t need to compensate pressure by sucking in air, which is what make the usual wiggly water effects you’re used to.
Yep. This is called laminar flow. It has nothing to do with the camera’s frame rate or shutter speed like what some people are claiming in the notes.
London-based student Lewis Hornby is a grandson on a mission. When he noticed that his dementia-afflicted grandmother was having trouble staying hydrated, he came up with Jelly Drops—bite-sized pods of edible water that look just like tasty treats.
Each of these colorful “candies” is made up of mostly water, with gelling agents and electrolytes making up just 10% of their composition. Available in a rainbow of colors and presented in packaging reminiscent of a box of chocolates, Jelly Drops are an easy and engaging way to avoid dehydration—a common problem for those suffering from degenerative neurological diseases.
“It is very easy for people with dementia to become dehydrated,” he explains. “Many no longer feel thirst, don’t know how to quench thirst, or don’t have the dexterity to drink.” With this in mind, Hornby set out to find a solution. In addition to seeking advice from psychologists and doctors, he opted to “experience” life with dementia himself through the use of virtual reality tools and a week in a care home.
Once he was familiar with what dementia patients need, he brainstormed what they want. “From my observations, people with dementia find eating much easier than drinking. Even still, it can be difficult to engage and encourage them to eat. I found the best way to overcome this is to offer them a treat! This format excites people with dementia, they instantly recognize it and know how to interact with it.”
Case in point? Hornby’s own grandmother’s reaction: “When first offered, grandma ate seven Jelly Drops in 10 minutes, the equivalent to a cup full of water—something that would usually take hours and require much more assistance.”
my thesis involves this principle! in fluids, viscosity (the thickness/stickiness of the fluid) and inertia (the tendency of something to stay in motion when a force is exerted) are in competition. glycerin is incredibly viscous, so the viscosity beats the inertia and the dye doesn’t shift beyond where it is immediately pushed–so exerting an equal and opposite force on the dye just puts it back to its exactly original position.
gas cloud get squished (gravitational collapse) then sometimes smaller elements can squish together to make bigger elements (nuclear fusion) and this continues as long as the smolest elements (hydrogen and helium) are in the core
NASA had learned the true language of the science side of Tumblr
