In 1930, a Hungarian inventor observed children playing with marbles in a puddle, noticing that the marbles left a trail of water in their wake. That's how the idea came about: why not use a ball-shaped metal nib for writing? This is how the pen was born. ✒️🖋 László József Biro shared his idea with his brother György, a chemist, and together they began researching and experimenting to create a new type of pen based on this concept. Finally, they found the perfect combination: a viscous ink and a tip with a small ball that rotated freely, preventing the ink from drying out and controlling its flow. They presented their invention at the Budapest International Fair in 1931 and patented it in 1938, although they did not market it immediately. With the start of World War II, the brothers emigrated to Argentina, where they founded a company in a garage. Although they were initially unsuccessful due to the high cost of the product, they secured a contract with the British Air Force, which boosted their popularity. In 1943, they licensed their invention to Eversharp Faber in the United States for $2 million. In 1950, Marcel Bich acquired the rights and, on the recommendation of an advertising expert, dropped the "h" from his surname and founded the company BICGroup. In that year, they launched the first BIC Cristal, one of the most perfect designs ever created, of which more than 20 million units are sold every day around the world. Since 1953, more than 100 billion BIC Cristals have been manufactured, making it the best-selling pen of all time.
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❗Thermal Camera for Mobile Phones❗
Would you like to have a thermal camera with you at all times? 📱🔍 Maybe even use it with your mobile phone? Introducing the Fluke Corporation iSee™ Mobile Thermal Camera! Here's a fantastic use case that I believe all electrical engineers will appreciate: checking temperatures in electrical cabinets. 🔥🛠️
Do you think is is just an gadget or real useful tool?
Today I will bet on useful tool.
P.S. If you like robotics, don’t want to miss any news from this world, and want to discuss with people who share the same interest, please join my Discord: https://lnkd.in/dcyA9zF4
hashtag#technology hashtag#innovation
Would you like to have a thermal camera with you at all times? 📱🔍 Maybe even use it with your mobile phone? Introducing the Fluke Corporation iSee™ Mobile Thermal Camera! Here's a fantastic use case that I believe all electrical engineers will appreciate: checking temperatures in electrical cabinets. 🔥🛠️
Do you think is is just an gadget or real useful tool?
Today I will bet on useful tool.
P.S. If you like robotics, don’t want to miss any news from this world, and want to discuss with people who share the same interest, please join my Discord: https://lnkd.in/dcyA9zF4
hashtag#technology hashtag#innovation
Why do jet aircraft make a strange halo when they pass the speed of sound?
Jet aircraft are amazing machines that can fly faster than the speed of sound, which is about 1,192 km/h (741 mph) at sea level and 20 °C (68 °F). When they do so, they sometimes create a strange halo around them, which looks like a white ring or cone. This phenomenon is called a vapor cone or a shock collar, and it is related to the sonic boom that the aircraft produces.
A sonic boom is a loud noise that occurs when an object travels through the air faster than the sound waves it creates. This causes the sound waves to pile up and form a shock wave, which is a sudden change in pressure and density. The shock wave travels in a cone shape behind the aircraft, with the aircraft at its tip. The angle of the cone depends on the speed of the aircraft, and the faster the aircraft, the narrower the cone.
The shock wave affects the air around the aircraft and lowers its pressure and temperature. This causes the moisture in the air to condense into tiny droplets, which form a visible cloud. The cloud appears as a halo around the aircraft, following the shape of the shock wave. The cloud disappears quickly, as the air returns to its normal pressure and temperature, and the droplets evaporate.
The vapor cone is not always visible, and it depends on the humidity and temperature of the air. The higher the humidity and the lower the temperature, the more likely the vapor cone will form. It also depends on the altitude and angle of the aircraft, and it is more likely to form when the aircraft is close to the ground and flying at a steep angle. The vapor cone is not harmful to the aircraft or the passengers, and it does not affect the performance or stability of the aircraft. It is just a visual effect that shows the power and speed of the jet aircraft.
Jet aircraft are amazing machines that can fly faster than the speed of sound, which is about 1,192 km/h (741 mph) at sea level and 20 °C (68 °F). When they do so, they sometimes create a strange halo around them, which looks like a white ring or cone. This phenomenon is called a vapor cone or a shock collar, and it is related to the sonic boom that the aircraft produces.
A sonic boom is a loud noise that occurs when an object travels through the air faster than the sound waves it creates. This causes the sound waves to pile up and form a shock wave, which is a sudden change in pressure and density. The shock wave travels in a cone shape behind the aircraft, with the aircraft at its tip. The angle of the cone depends on the speed of the aircraft, and the faster the aircraft, the narrower the cone.
The shock wave affects the air around the aircraft and lowers its pressure and temperature. This causes the moisture in the air to condense into tiny droplets, which form a visible cloud. The cloud appears as a halo around the aircraft, following the shape of the shock wave. The cloud disappears quickly, as the air returns to its normal pressure and temperature, and the droplets evaporate.
The vapor cone is not always visible, and it depends on the humidity and temperature of the air. The higher the humidity and the lower the temperature, the more likely the vapor cone will form. It also depends on the altitude and angle of the aircraft, and it is more likely to form when the aircraft is close to the ground and flying at a steep angle. The vapor cone is not harmful to the aircraft or the passengers, and it does not affect the performance or stability of the aircraft. It is just a visual effect that shows the power and speed of the jet aircraft.