Search results
Results from the WOW.Com Content Network
The key to understanding the behavior of the balloons is understanding how the pressure inside a balloon varies with the balloon's diameter. The simplest way to do this is to imagine that the balloon is made up of a large number of small rubber patches, and to analyze how the size of a patch is affected by the force acting on it.
Balloon rockets work because the elastic balloons contract on the air within them, and so when the mouth of the balloon is opened, the gas within the balloon is expelled out, and due to Newton's third law of motion, the balloon is propelled forward. This is the same way that a rocket works.
The intra-aortic balloon pump (IABP) is a mechanical device that increases myocardial oxygen perfusion and indirectly increases cardiac output through afterload reduction. It consists of a cylindrical polyurethane balloon that sits in the aorta , approximately 2 centimeters (0.79 in) from the left subclavian artery . [ 1 ]
A balloon can only have buoyancy if there is a medium that has a higher average density than the balloon itself. Balloons cannot work on the Moon because it has almost no atmosphere. [15] Mars has a very thin atmosphere – the pressure is only 1 ⁄ 160 of earth atmospheric pressure – so a huge balloon would be needed even for a tiny lifting ...
Balloon fetishists (colloquially "looners") [1] may be divided into two categories: those who are sexually inclined to pop balloons, possibly alongside other activities (called "poppers"), and those who are sexually inclined exclusively to non-popping activities, such as blowing up balloons and deflating them (called "non-poppers").
Wafting across the United States and into the attention of an alarmed national and global public, a giant Chinese balloon has changed Americans' awareness of all the stuff floating in the air and ...
Some states have banned mass balloon releases, like the one in Cleveland, Ohio, in 1986 when a charity set loose a world-record 1.5 million helium-filled balloons.
US Marine Corps barrage balloon, Parris Island, South Carolina, in May 1942 A barrage balloon is a type of airborne barrage, a large uncrewed tethered balloon used to defend ground targets against aircraft attack, by raising aloft steel cables which pose a severe risk of collision with hostile aircraft, making the attacker's approach difficult and hazardous.