Engineering

Thousands of members of the Hezbollah militant group in Lebanon have been injured when handheld pagers they use to communicate with one another suddenly exploded without warning this afternoon. https://edition.cnn.com/world/live-news/lebanon-pagers-attack-hezbollah/index.html The wave of blasts in Beirut and other areas began around 15.45 local time (1345 GMT), causing mass panic and many hundreds of signficant injuries. The casualties reportedly include Mojtaba Amani, the Iranian ambassador to Lebanon. According to Reuters, Hezbollah spokesmen say the incident constitutes the biggest security breach of their communications infrastructure in the history of …

I think this is the right place to ask the question. There are many tips online about how to turn off the smoke alarm. But almost no one mentions there is a control near your door, which should be able to turn of the smoke alarm. I tried it once, did not work at all. Does the control work in your house?

If I were to have my way, I would build 1. safe 2. affordable 3. energy-efficient 4. green-renewable-energy-using 5. practical 6. comfortable 7. neatly-constructed 8. long-lasting 9. mechanically reliable 10. roomy 11. good-looking 12. solid 13. quiet 14. convenient-to-drive 15. American-built 16. low-maintenance automobiles, light-duty trucks, vans and sport-utility wagons for Americans mainly.

With airplanes they have to be both light and strong. That being the case, is it possible to make an airplane that's bulletproof? Can they make an airplane that's strong enough that bullets can't penetrate the fuselage?

Apparatus Full body Green Morph Suit Green Screen Cape 360 Degree Camera on top Operational The 360 degree Camera records Live footage at 60 frames per second It projects the Live feed to the Green Screen Cape Front of Camera projects to the back of the cape, back of the Camera projects to the front of the cape

Take it one step further. Have a Cloud generator machine in the Air generate Cumulonimbus clouds. Then, absorb the Lightning somehow.

Hi, We can't mathematically describe what happens when two generators(simple batteries ) in parallel power the same component with two different voltages, as anomalies arise in the study of this circuit(example U1=1v et U2=2v anomalie 1v=2v). In reality, one or both generators will stop functioning, and this circuit is forbidden in electronics because it can destroy the generators. But imagine that we replace the exact voltages of the two generators with two isolated moving magnets. What would happen to the magnets? Can we study the real behavior of a circuit powered by two different voltages in parallel from two moving magnets in this case, wi…

On Monday August 19 a luxury yacht called the Bayesian was sunk at anchor at Porticello near Palermo on the NE coast of Sicily by a freak storm that struck without warning at 4am in the morning. Violents winds of around 150 Km/hour and a large waterspout capsized the vessel which sank within 2 minutes according to eyewitnesses. Of the the 22 people onboard, six are still missing, including British tech magnate Mike Lynch and his daughter Hannah, along with Jonathan Bloomer (the CEO of US investment firm Morgan Stanley International) and his wife. Mike Lynch, a tycoon who was once hyped as the ‘British Bill Gates’ had only recently been acquitted in June on 16 counts…

I was thinking while i was playing my gameboy about screens without a backlight, and realized something. it might be possible to use an switchable glass panel (more about it here: https://www.cantifix.co.uk/blog/what-is-switchable-glass-and-how-does-it-work/#:~:text=In the most simple terms,it's very much a reality.) paired with a mirror behind it. in front of this would be a clear backlight & lcd panel. I honestly dont care if people take my idea, as long as they give credit. i just think it should exist... but maybe the reason it doesnt exist yet is because its stupid? idk, any ideas that might improve this or make this possible/exist just let me know. oh a…

I have an idea and I request information on how I can make playing cards that I can throw and they'd explode upon impact.

Hello all. While cooking or just boiling water in a glass pot, the water boils limited to 100C; does the steam above the liquid surface bombarded with microwave energy rises above 100C ? In other words, what happens exposing steam to microwaves ?

Hello. At the explosion/expansion cycle of a plain internal combustion engine -no turbos/high performance/fancy fuels- what pressures ranges are typical ?

Hi. Seen several contraptions shown in youtube videos that seem to pump somehow and a container works in partial vacuum. There is maaaany videos doing the same in many styles. Can someone explain what is going on ? I dislike to send you to a particular link, just search terms "water pump" within youtube for your own choice. If you really want an example link, try ---> https://www.youtube.com/watch?v=23Afu1ViH3E and dozens appear at the side column. They all use a container, and mostly asian construction. Perhaps there is one in english.

It has always been a mystery to me. HOW are watch parts made ? What equipment, machinery takes to make gears a few millimetres small with such degree of precision and replication ? Ladies watches having even tinier gears, jewels shaping, machining, dimensioning? ... are impressive. And it has been happening for a couple of centuries plus, since the machining techniques were less than in their infancy... And to make it harder, how are the machines that make timepieces parts made ? Please share whatever you know; I will hold my jaw from dropping. Thanks.

Greetings. Do you know of a hydraulic piston or piston-cylinder assembly that I can re-purpose instead of fabricate/re-invent the wheel ? Similar to brakes, much larger diameter, like 50 to 100 mm. To work in reciprocating motion, only about 50mm travel, ~<10 strokes per second, up to 5000 psi. (not with a seal for rotating shafts) It is to produce pulses of hydraulic pressure. Like a driven small engine using it as a hydraulics reciprocating compressor 🙄 -Images borrowed from the web-

What is the difference ? Marketing ?

Which size can have a smallest feasible surveillance wireless camera? The camera should include optics, sensor, control chip, atomic battery and housing. For how long will it be able to operate (capture video) on a single charge?

1) Can they stop the computer to fly the aircraft, ant they just fly the aircraft by a living person? 2) Can they turn off MCAS, that rubbish device forced the aircraft flies head to the ground? 3) Can they just stop try to pull back the control stick, they just stop to fight with the machine, the computer may fix its own mistake, anyway the chance should be very little.

Number One: what methods could be used to greatly reduce the risk that fire will will result from the batteries? Number Two: what technology could be used to protect people and dogs inside the car from death or serious injury in case a battery-related fire did break out (or was on the verge of breaking out) while people and dogs were still in the car, parked or moving? There is both a very hot and violent burning hazard and a highly toxic smoke hazard. A fuel-related fire inside the engine compartment of a gasoline automobile, at least, is going to burn rather tame and the engine compartment and firewall is going to keep the flames and heat away from people inside…

We humans wear clothing for various reasons (to avoid being naked, for temperature protection, protection from dirt and moisture, to express our individuality, etc.). Some of these reasons may not be important for robots, but others are even more critical. Protection from moisture, dirt, and dust is more important for robots than for humans. These factors can destroy robots, or at least it is very time-consuming to clean a robot constructed similarly to Optimus from dust and dirt. Even when performing simple kitchen tasks involving fats or oils for cooking, the grease will get everywhere. If he works with flour, cleaning Optimus afterwards will be more tedious than c…

Indoor skydiving apparrently works by means of a "vertical windtunnel" blasting air upwards at about 150mph, so novice skydivers can gain experience of floating. Could vertical windtunnels be installed on a much larger scale around very tall buildings to be uncovered and switched on in the event of a rapid evacuation? Would it be possible for people to have jumped from the top of the World Trade Centre at 1368 ft to be caught safely in a vertical windtunnel at the bottom? Cheerz GIAN🙂XXX

I have 6 spotlights in the ceiling of my kitchen and one of them has started flashing a short while after they are switched on. The flashing is at a rate of once every second or so, and after a while it stops and stays on continuously, though sometimes one of the others then flashes or even cuts off. I’ve tried changing the bulb but that makes no difference. Must be something to do with the transformer I think. Web search suggests it could be replacement of halogen bulbs by LED, causing too little current to be drawn for the transformer to work properly. Does this seem plausible, why should that happen, and what can I do about it?

This is probably nothing more than a cool science fair experiment/project but i had an idea: Motor | Pedals/Alternator -> Computer <-> Battery <-Regen brakes I searched it up and even the best alternators are only about 80% efficient. Any ideas on how i might improve on this design?

According to the WSJ and NBC News reports, investigators are looking into the possibility that contaminated fuel may have contributed to the collision that caused the collapse of the 1.6 mile span of the Francis Scott Key bridge across the Patapsco River Baltimore just after 1.24 a.m Tuesday. https://www.nbcnews.com/news/us-news/rare-mayday-preceded-baltimore-bridge-collapse-couldnt-think-worse-sit-rcna145212 A 1000’ long cargo ship called the Dali broadcast a rare Mayday call shortly after leaving harbour to warn shore authorities that it had lost power and steering control, before slamming into a bridge support column 4m later. There was just enough time to cl…

Non-engineer doing research for a story... Recently, there has been discussion of colonizing Jupiter's large moons in the long term. One solution offered to the problem that the Jovian environment has lethal levels of radiation is to simply build colonies under the icy surfaces of these moons. This would also be done to provide access to the subsurface oceans of these moons. But this got me thinking about another potential problem...how stable is the ice? Especially if you are producing a town's worth of heat. Wouldn't you eventually cause so much melting that whatever foundation was holding your town in place would fall apart or collapse? Or have the …