That link is for evaporative coolers; is that the kind of device I was describing? I don't think that will work in my case because I need the air to be relatively dry, rather than increase humidity. Are there no other options for outdoor cooling?
I need a way to generate cool air outside when temperatures are 90s and above. Basically what I am thinking of doing is essentially like positioning a fan right beside a bowl of ice cubes. Only in my case, instead of using ice cubes, an electrically powered cooling device that can slightly...
Maybe I don't quite understand the point of the equation: q = hc A dT . I plugged in values of hc = 100, A = .01, dT = 40 and the answer was q = 40 w per second. I just want to know what that answer tells me about how much a given volume of air above a hot surface will increase over a given...
I am trying to understand the concept of convective heat transfer. I plugged in some values into the convective heat equation and ended up with q = 40. Now, I don't know what that means. What does that tell me about how long it would take to bring a given volume of air around a hot surface to...
I really need someone who can do that for me, since I definitely don't have any experience with engineering. I played around with a free program called Lisa for the last hour, and I really have no idea what I'm doing.
Yes, that's basically it. If you do a Google image search for aluminum laptop tripod you will see many examples of what I'm trying to do. Right now I have an aluminum tray for my old laptop that sits on a tripod mount. I want the same thing for my tablet, but I want to reduce the weight of...
I am looking for someone with mechanical engineering background who can assist me in making some calculations. I have an aluminum tray that is connected to a tripod and that supports a laptop. I want to get a lighter and smaller aluminum tray that can accommodate a tablet, but I don't know...
I guess I misunderstood the concept. What I am really trying to find out is a way to calculate how much weight an object can support based on its size, thickness, and its constituent material. I have done countless web searches and I can't seem to find the right terminology or formula.
I need some help with something that seems rather simple, but I don't know how to apply the formula. Let's say I have a table and based on the particular material from which it is constructed, it has a strength to weight ratio of 50 kN·m/kg. If I were to place an object on the table that...
My challenge is I am trying to get my design perfected before submitting it to a machine shop or 3-D printing service, since I cannot do it myself. I know enough at this point that nylon or aluminum would probably work. The only thing I don't know is the minimum amount of material needed and...
I need a special holder for both my tablet and an eye tracking camera. There is only one specifically made for that purpose that I know of, but the weight of the holder seems at least twice what is necessary, and it is quite expensive.
What might really help me at this point is knowing how to...
I only thought of 3-D printing because I thought it would be easier to make a design and send it off to a printing service.
I have only been using programs like Tinkercad and Sketchup, neither of which I like, and I don't think they have fea (what does that mean anyway?). I'm a novice here so...
I need some advice on my design for a tablet holder that I want to get 3-D printed using a printing service, not my own printer. I need to decide which material to use and how thin I can make it. I asked for advice already on a 3-D printing forum, but they could only tell to find out through...
I have a rudimentary background in physics and would like to do self-study for my own intellectual curiosity. If I wanted to try to get a grasp of something like M-Theory or inflationary cosmology, what physics subjects would I need to study first? Also what kinds of mathematics would I need...
I have a question about a seemingly illogical and strange aspect of multiplication and unit conversion that I have never noticed until now. It concerns the issue of finding the area of a square/rectangle when the length and width are expressed as decimals/fractions. Ordinarily, when you find...