Trailer Wall/ Panel Separating

Is there a fire rating for intermodal shipping containers?

I expect your main difficulty will be the lack of UL approved assemblies which may require you to overdo it a bit to satisfy the locals. A 1.5hrs rating is not that hard to achieve. Roughly speaking each layer of 5/8″ type X will give you 1/2hr and a traditional stucco job on the outside should be good for an hour so that should do the trick without even counting the steel of the container wall itself. Connection details may be a bit trickier since there will be next to nothing to use for reference.It's always a challenge to use unconventional methods since the local officials typically don't like extra work and will default to playing it safe with approved assemblies and details. Your best bet is probably to talk to the officials and see what they will require. If you make it clear that your desire is to do things right and not make their lives more difficult they will likely at least be cooperative. Since many officials are retired contractors and engineers they might even take an interest and help you work out a reasonable solution. Alternatively if they are going to be intransigent and uncooperative you might as well find out early.If I were doing it I would go for rigid insulation and stucco on the exterior and argue that the steel interior finish excedes the flame spread specs of type x drywall. I don't see much point in using the containers and then making them even smaller on the inside with gyp board. If you can find a 1.5hr stucco assembly detail you should be all set.

Can I watch 3D movies on Android smartphones?

It is definitely possible to watch a 3D video on your Android, or for that matter, any smartphone. The basic idea of 3D video is that each of your eyes should see a slightly different image (at a different angle). This technique of creating the illusion of depth in an image is called Stereoscopy. For 3D, this may be achieved by creating 2 views which may be side by side (horizontal and vertical) or over and under (top and bottom).There are 2 major commercial technologies in use. The Anaglyph 3D and the Polarized 3D. Anaglyph 3D, found in normal LCD TFT displays (PCs, tablets, mobiles) encodes images used by each eyes using filters of different  colors (red and cyan) while Polarized 3D, found in cinemas and high end TVs, uses filters that will allow  only images that have similar polarization.To view 3D video on our phones, we'd require a pair of Anaglyph glasses which come pretty cheap and a 3D video player, which are available in plenty on the Play Store. Remember that you'll need a 3D video which is in the side by side format. PavTube BDMagic is a great tool to convert 3D videos into the 3D SBS format, which is just a side by side playback of 2D video, but is perceived to be 3 dimensional by our eyes.If you want a better experience, go ahead and buy one of the multiple Virtual Reality headsets available, the cheapest of them being Google Cardboard (a DIY is available for around INR350). There's Oculus ($100), Sony's Morpheus (still not on sale) and a new one called Immerse which retails for around $45. Others are coming up like HTC Vive or Microsoft's HoloLens. Most of these have their companion apps and work well with 3rd party apps, games and videos. Hope this leads to at least try Google Cardboard and get an amazing VR experience!

Why do the positive and negative wires spark when touched?

Let's say you touch the two wires coming out of a power supply together, only for a moment. Since these wires have a difference in electrical potential (voltage) current will flow and you'll get a spark.It's a process:The physical contact between the wires gets broken.The air ionizes, which means that the atoms in the air around the now-broken connection start to carry current. It's called an electric arc. It's a hot process since air normally provides a lot of electrical resistance - the amount of heat generally depends on the voltage between the two wires. More volts means the electricity has more “push” behind it, so more of it flows. High amounts of electric current mean more heat. This is where you'll start to see sparks.The metal wire may melt to a degree, if the voltage is high enough. This produces small bits of molten metal in addition to the spark. The biggest “sparks” are called arc flashes and those have enough power to vaporize wire entirely.Note that electricity needs to be flowing for this to happen. In the example with the + and - wires this is simple: the current “wants” to even out the potentials of the two wires, so it flows. Sparks also happen when one wire is feeding a device and suddenly gets disconnected. That's why you'll get a spark when you unplug a running vacuum cleaner or space heater. Turn your devices off before you unplug them, especially if there's flammable gas in the room.

Is there any way to use a single split A/C to two rooms? How efficient would it be if a pipe is split into two rooms from the output of the A/C?

I believe that Sanyo and Mitsubishi actually make these a single condensing unit with two remote evaporator fan units. These are not commonly used due to the difficulty of getting lubrication back and forth from evaporator to compressor. These really have strict limits for piping as well as vertical height limitationsHowever, walk-in coolers have used this technology for 70 years or longer. You would find a compressor room with multiple cycling compressors and the unloading valves would load unload based on needed capacity. It would not be unusual to find a dozen or more evaporator fan units in walk-in coolers. These systems work by having an oil separator that removes 90% of the oil as it leaves the compressor. This further developed to an oil tank to store oil similar to the oil stored in race car. On each compressor there is a float bowl that allows oil into the compressor crankcase. An oil pump is inside the compressor to force oil through the crankshaft much the same as an automobile. This allows greater distance of piping and fewer limits on vertical up/down in the piping that can cause oil slugging.However, the hermetic sealed compressor was just so cheap to make that the one compressor one evaporator arrangement has been used in commercial AC for the last 60 years. Today with scroll compressors the cost to have one compressor and multiple evaporators is too expensive.Field brazed refrigeration systems are rare as it is so difficult to avoid leaks and keep contamination from getting inside the piping. The pre-charged line sets with one connection has almost zero chance of leaks until the equipment wears out.