Engineering

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What if when the first cars were invented, there was a collision between two cars and both gas tanks exploded and killed the people driving the cars? Was that an indicator that the internal combustion engine was unsafe and could never be useful in cars? No. Something like that may be going on with nuclear power. Just because the early nuclear reactors were not safe enough, does not mean that they will never be safe. Here are some ideas for safe nuclear reactors, thorium molten salt, and the Natrium reactor. Comments to this video: "Advantages of thorium: Much safer than uranium-no pressure vessel, no fuel rods to melt down. Much simpler reactor.…

Is this a possible source of fresh water? In theory this is the way it works. There is a steady migration of unskilled labor thru the US southern border. Let's put them to work. That is the region where this idea can work. You need coastal deserts and lots of unskilled labor. There are coastal deserts on the Pacific side and the Gulf side of the US border, both in the USA and in Mexico. The idea is to build hundreds, then thousands, of shallow concrete ponds. The ponds are covered with glass made from abundant desert sand. Huge pipes deliver seawater from the Pacific and Gulf of Mexico into these coastal desert concrete ponds. Unskilled laborers mix and pour …

In 100 years from now, what features would you expect a house to have? POWER: By 2122 you would think that all roofing material would be very durable and covered with solar cells. The entire roof will generate power to be stored in banks of super batteries. Only a fraction of the power generated on the roof will be needed by the household, most will go to community batteries for local public use. WATER: Where I live in dry southern Calif, fresh water will become an issue. I was thinking of gutters to collect all rainwater. But simpler than that, and a great expansion of surface area for rain to be captured would be to have about an 8-foot concrete margin…

"Given the energy intensive nature of desalination, with associated economic and environmental costs, desalination is generally considered a last resort after water conservation. But this is changing as prices continue to fall." Desalination - Wikipedia Rain water harvesting could be a major source of fresh water. If enough houses and buildings were designed with gutters that collect all the rain that lands on a roof, and all that runs off pavement, that water could be saved in big reservoirs attached to any house or building. That water can be used for growing plants and all households needs. Watering lawns should be discouraged but rather use drought-resistant …

I don't know whether or not this anecdote is real, but it's the reason my attention was brought to the concept of "demolishing" condemned buildings and how wasteful it sounds, to say nothing of the perverse incentives to recruit demolition employees who might be biased by their destructive instincts against the possibility they're really being used as accomplices in vandalism. (After "The Troubles," a church group offering teenagers an opportunity to demolish a building sounds sketchy as all hell.) A: Obvious first question is; why aren't they just repurposed? If a building is no longer structurally stable enough for its former purpose, why not strip it of its…

Is it possible to predict the properties of metal alloys? I think many of the first alloys like iron and carbon equal steel were probably accidental but can we predict this now days?

Got this question in one of the previous year questions. Not sure what would be its answer as it is not included in the reference textbook, reference pdfs etc. Can you guide a bit about this?

Hopefully Ukrainian nuclear power plants of recent years have built-in redundant safeguards against fires like Western power plants. I'd hate to see another Chernobyl.

I got the idea that you could theoretically have the best suspension on any vehicle in the world if you could have the vehicle body hover above the wheels. This would also enable the use of omni-directional "ball" wheels that would not be restricted to an axle. My question is, assuming we were able to have an on-board cooling system that kept the bottom of the vehicle at approximately the -300 degree superconductivity threshold, would it be feasible to create this mechanism, or any variation thereof remotely resembling the aforementioned design, via the use of quantum locking, and, if not, is there perhaps another technology that could achieve the same goals?

I sometimes like to record the sunsets and sunrises, but standing outside next to my camera for the entire duration thereof is tedious, and leaving it outside unattended risks incentivizing my neighbours to steal it. Does anyone here know of any reliable lockable safes made of glass or clear plastics, which would sound an alarm if a would-be thief attempted to break the glass, and/or how to construct such a safe from scratch if need be?

I didn't find any resources regarding this topic. Can you help me with some points on how men and society would be important to engineering profession.

Hi all. Photovoltaic solar panels are around 18% efficient. That means a 1m2 panel should yield about 180 Watts to heat something electrically at full sun. What is the typical efficiency extracting heat directly from sun radiation, assuming also 1KW/m2 irradiance as in a 1m2 uncovered coil like : http://getgotechnology.com/wp-content/uploads/2014/12/Sun-Coil-heating.jpg Would it be around 60% ? Wind and thermal losses should be taking a good chunk, right ?

For those who don't believe in human caused global warming, this is a topic that probably has little meaning. Hopefully there aren't many of those kinds of people around here. After all, this is a science forum. On the topic of free energy, the question to be asked is if the engineering aspect of it possible. From something I found, it seems to be. I will post a link to another forum that goes into the matter. I guess it will be up to the mods to decide which is more important. Free energy or that this topic was brought up in another forum. One that for the record I am not endorsing in any way. I guess we will find out

This from an AP News report prompted me to wonder about the apparent need for an external electricity source in many nuclear plants to run the coolant pumps... So, with these designs, if you lose grid electricity, you go to diesel backup, and if that fails, you better have batteries. What I have never fully understood is why designers, from the start, wouldn't look at this system producing massive steam and think, for safety's sake, we will put in some emergency shunt to a steam turbine that could provide emergency coolant pumping. So the pumps run directly off the plant's heat. As it cools, there is less steam, and there is less need of the steam to run th…

So two tradeoffs came to mind recently... the tradeoffs between subways and elevated rail, and the tradeoffs between solar panels and thermal solar. So I figured I'd put them in the same thread, in case any more come to mind, or in case anyone else has any they'd like to share. So of the downsides I've heard of to elevated rail, the most common I hear of are the noise, and the temperature fluctuations causing rail defects. However, I weigh this against two advantages. One, you see the town outside your window instead of only the tunnel, which, scenery for scenery's sake notwithstanding, has the added benefit of you not having to pay quite as carefu…

The sex simple machines (ref: sextuplets) : 1. Lever 2. Wheel & Axle 3. Inclined plane 4. Pulley 5. Screw 6. Wedge What's the definition of a machine? No restrictions on comments/observations. Feel free to say anything (interesting) you want.

So a common criticism of air travel is that it's hard to sleep during it. One contributing factor to this is the seats. Indeed, people are stuffed like sardines into these planes, it's part of what makes air travel so efficient. But if they had beds in lieu of seats, would it be physically possible to stack them in a manner that crams just as many passengers into just as small an amount of space, while allowing them the convenience of getting to sleep (or at least lie down) for the whole flight? How safely could bunk beds be stacked together while still allowing room for people to get out if they need to use the washroom or something like that?

context taken from here. I am not law student but engineering student but we have to study this in our subject called engineering professional practice and I got confused so asking this here... source-:

Honestly, I can't understand what it is trying to ask me. https://ioesolutions.esign.com.np/notes/text-notes-show/Sector-Contract-Management I am learning engineering professional practice. I am studying this chapter(link above). What is the question trying to ask to me? Can you tell me about that? I have a book about it as well but I can't find what keyword I think I should search..

I'm about to create my first rocket, therefore I would like to know if someone has already made ones. Please, share your experience of creating rocket models here.

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