Sign Up Now!

Sign up and get personalized intelligence briefing delivered daily.


Sign Up

Articles related to "pressure"


Undulating their bodies keeps flying snakes from tumbling out of control

  • Flying snakes can glide as far as 78 feet (24 meters) without tumbling out of control because they undulate their bodies mid-flight, as if they were swimming through the air.
  • To ensure maximum gliding distance, the snake will suck in its stomach and flatten its body, curving inward like a Frisbee to create lift, undulating its body in an S-shaped motion, which serves to increase the air pressure underneath.
  • While undulation frequency wasn't especially important in terms of predicting flight behavior, the amplitude of the undulation did play a key role in stabilizing the snake mid-glide.
  • Based on that data, the team developed an "anatomically accurate" 3D mathematical model of snake flight and conducted simulations of glides, both with and without undulation, incorporating inertial and aerodynamic effects.

save | comments | report | share on


Tornado Alley just had one of its slowest seasons ever

  • Nationally, May saw 140 tornadoes, well below the average of 276, and the fewest in 50 years.
  • In fact, this year there were more tornadoes in two days in April than in all of May. On Easter Sunday and the early hours of that Monday, 190 tornadoes, including 16 rated EF3 or higher, tore through 10 states, killing 36 people.
  • Typically, tornado season runs March through June, with peak activity shifting from the Southeast to the Plains after late April.
  • Tornado activity peaked in the Southeast early in the season.
  • It seemed that we were headed into a busy season as storm activity shifted to the Plains.
  • The most active years have been characterized by abnormally large or innumerable outbreaks that accounted for most of that year's tornadoes.
  • This was followed by 2020, which was historically quiet, despite April's burst of activity.

save | comments | report | share on


Weighing a Car with Tire Pressures

  • We know that the weight of the car must be reacted by a force from the tires, since the tires are the only thing in contact with the ground (if all is well).
  • Four reaction forces at the tires = the total weight of the car.
  • The feet of the table provide a relatively small area to react the weight of the book.
  • Or do the tread blocks push directly on the air inside the tire (the equivalent of the book sitting on the legs of the table without the tabletop)?
  • To get my forces at the tires, I simply multiplied pressure by the area of the footprint.
  • All summed, the version that ignored the tread gave me a total weight of 2,377 lbs.
  • The version that accounted for the grooves gave me a total weight of 1,731 lbs.

save | comments | report | share on


Weighing a Car with Tire Pressures

  • We know that the weight of the car must be reacted by a force from the tires, since the tires are the only thing in contact with the ground (if all is well).
  • Four reaction forces at the tires = the total weight of the car.
  • The feet of the table provide a relatively small area to react the weight of the book.
  • Or do the tread blocks push directly on the air inside the tire (the equivalent of the book sitting on the legs of the table without the tabletop)?
  • To get my forces at the tires, I simply multiplied pressure by the area of the footprint.
  • All summed, the version that ignored the tread gave me a total weight of 2,377 lbs.
  • The version that accounted for the grooves gave me a total weight of 1,731 lbs.

save | comments | report | share on


Surgeon general: Racism to blame for coronavirus toll on people of color - Business Insider

  • Surgeon General Jerome Adams said that "structural racism" has played a role in why communities of color have been particularly hard hit by the coronavirus pandemic.
  • In an interview with Business Insider on Friday, Adams reflected on federal data released last week that found Black seniors were four times more likely than white seniors to be hospitalized due to the coronavirus pandemic, and that Latinx seniors were twice as likely to be hospitalized.
  • In response to health disparities in America, Adams is readying two calls to action in the coming months on hypertension and maternal mortality — both issues that disproportionately affect communities of color.
  • The hypertension and maternal mortality calls to action have been in the works for a while, even before the pandemic, but have renewed relevancy, the surgeon general's office said.

save | comments | report | share on


Surgeon general: Racism to blame for coronavirus toll on people of color - Business Insider

  • Surgeon General Jerome Adams said that "structural racism" has played a role in why communities of color have been particularly hard hit by the coronavirus pandemic.
  • In an interview with Business Insider on Friday, Adams reflected on federal data released last week that found Black seniors were four times more likely than white seniors to be hospitalized due to the coronavirus pandemic, and that Latinx seniors were twice as likely to be hospitalized.
  • In response to health disparities in America, Adams is readying two calls to action in the coming months on hypertension and maternal mortality — both issues that disproportionately affect communities of color.
  • The hypertension and maternal mortality calls to action have been in the works for a while, even before the pandemic, but have renewed relevancy, the surgeon general's office said.

save | comments | report | share on