What makes a frisbee stay in the air for so long? By creating a specialised throwing device, researchers determined that torque — the force that produces rotation — is responsible for causing spinning disks to fall out from the sky. However, at certain angles, torque causes flat disks (like beer mats) to flip around. So what makes the frisbee different? Their rounded edges reduce the amount of torque they experience, making their flight more stable.
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If you’re visiting a farm, keep an eye out for an ominous-looking bronze fog. Nitrogen tetroxide, a red-orange gas, is made by certain bacteria during fermentation when oxygen is lacking in the crop. The lack of oxygen causes the bacteria to use the nitrate within the crops, which then produces nitrogen tetroxide. Inhalation of the gas is known to cause permanent lung damage or kill people and livestock. To prevent this, farmers have started performing nitrate tests after four weeks of fermentation. Read full article here