Engineering

If you are, I got some questions for you? I will start off by asking what kind of laws/principles/theorems do you deal with in real life circuit analysis? What kind of software do you use? Does the computer do most of the work?

Hello,my name is Puja Chrisdianto Manapa, i have interest in biosorption research. Could you guys explain to me about the method i can use to reduce the time require for adsorption?

Another contraption accepting opinions: A submarine glider towing a boat. Linked by a hose doing the pull. Solar panel+battery on the boat compresses air. Flow of compressed air towards a bellows/bladder in submarine bow makes it buoyant with rising bow or sink with dipping bow when venting. Glider fins on submarine and cyclic compressing/venting should propel the contraption forward. Would the 'dorsal fin' or the 'tail fin' , or where be a better point to attach the hose for the glider to tow the boat ? This is a variation from an older thread ----> https://www.scienceforums.net/topic/72310-pour-your-brains-here-on-how-to-build-this-contrap…

Hi all. Picture a glider model, ballasted to stay near horizontal and near neutral buoyant when placed in the sea. When placed in the warmer water surface, with daylight and little depth pressure, some mechanism makes the nose go down, slightly decreases buoyancy and advances while dives. When reaches a set depth pressure, darkness and cold water, those cause the mechanism to toggle back towards being slightly buoyant and tilt nose up. It will rise and advance. When surfaces, little depth pressure, daylight and warmer sea temperature cause the mechanism to toggle towards slightly decreased buoyancy and nose down. It will sink again and advance. Repeat…

im a tradie who has spent his life with all kinds of tools. we often take for granted the thought that goes into designing most of these tools. so i was drilling heaps of holes into stone last week. something ive done many times but not really thinking bout it. i tried a different drill bit and was surprised how different it was. so then i got thinking about the science behind drill bit design and how i can learn more about it. after all, knowledge means being able to better choose the right tool for the job. ive tried to find a youtube vid about this but cant. specifically id like to learn,for example, why/how the spirals are different shapes and angles,…

In magnetic induction, how do I affect materials in between two coils or two metals inducing electric current? Lets say, two coils and there is plastic in between them, I want to melt the plastic by using magnetic induction (obviously, I want to induce heat). What are the WAYS to achieve such thing?

Hi, I know that laser guided bombs works by projecting a laser to an object and the bomb will have a photosensor that tries to keep the reflected laser in the center of the sensor, right? What I wonder is how does it know how to move in order to keep the laser in the center of the photosensor? Is this the only thing it requires to hit the target? Trying to move little all the time to keep the reflected laser in the center of the photosensor?

Hi. Would it be much better that flight recorders (black box) spit out their data contents instantly at any and every anomaly via radio to nearby receivers and kept there for evaluation instead of searching, recovering, battling time in a hurry ? I suppose emergency channel receivers are on all times at airports. It is century 21 !

I was wondering as I was playing Apex Legends that are these energy weapons possible, more accurately is to shoot an energy ball/projectile. How could today's science achieve shooting maybe balls of electricity without it scattering in an instant as it leaves the barrel. In my head, im thinking that energy is contained in magnets, then those magnets push the highly compressed electricity out but then it will dissipate very rapidly. Is there a way to partially solidify energy/electricity? (note: im not talking about plasma balls)

Hi, I wonder how the laser coming out from a laser microphone gets affected by sound waves.

I want to discuss the possibility to build an elevator on the Moon surface... There are some data: Basically, the speed on the surface will have to follow this rule: (where u = 4.905E12 m²/s) The limitation, for the length of the cable is 4,500 km high...

Is it possible to power a drone from a set of capacitors, i did a rough calculation for the energy contained in a 380mAH LiPo for a toy drone battery, the equivalent energy required, as stored on capacitors would be equivalent to a massive capacitance of 730 Farads, most caps are measured in mirco fards. Im beginnning to think it capacitors will just be too large and clunky for the drone to carry even if it powers it.

Hi, I wonder how monochrome, sunlight-visible, transflective memory-in-pixel (MIP) displays works. Like the one on my Garmin Instinct. Does it work like e-ink displays? The more light getting on the watch, the easier you see the display. When it's dark you can't see it at all. Image below.

Hi, I wonder how devices like vapes for example can have the same wattage until the battery dies. Shouldn't wattage drop down when the battery level drops, because then the voltage will be lower?

I stumbled upon this ancient time-keeping device,The Chandelier Clock of Ibn Yūnis , The principle is simple, each lamp is burning a certain amount of time. You have to put in each lamp a specific quantity of oil in order to burn, the first for 2 hours, the second for 4 hours etc. With the subtility that in antiquity (& medieval times) the hour was not standard but it was a portion of daytime. When the day was short, the hours in sunlight were short & in night time were long. Here below the description of the object And here a couple of images I am seeing that the lamps are not at the same height. i see they are all connected (for sa…

I am designing a pervaporation membrane module to separate a feed stream of 81.57kg/h containing ethanol (90.3158wt%) and water (9.4955wt%), however I have now discovered that there is a trace amount of acetone in my feed stream (~1.887wt%). I was originally considering using a crosslinked poly(vinyl alcohol) as my selective layer to separate the ethanol and water. Is there any way to separate the acetone out first as I have a feeling it will disrupt my membrane quite a lot and result in a lower purity of ethanol in my retentate.

Hello you all! It is known, but not universally, and intriguing anyway: an RC network can amplify a voltage. No power gain of course, here a low impedance drives the network and a high impedance observes the output. The example network on top right here does that: It is best understood as a three-cell lowpass RC, as on top left, where the output was moved to other terminals, between what was the usual output and what was the input. The reasoning is valid because the implicit low-impedance generator stays at the same place. If, at some frequency, the network has some amplitude at the usual output with a phase between 90° and 270°, that is, it shows…

Descriptions of ground source heat pumps (GSHP's) talk about extracting heat from the ground for residential heating, but I haven't heard of putting heat back into the ground as thermal energy storage using these systems. Does anyone do that? Would it be efficient - or at least cost effective - where an oversupply of say, solar energy during warmer seasons can be used?

How significant are the effects of micrometeoroid impacts on interplanetary and interstellar travel? The ISS does have some issues with these, but would the space in between planets have them at the same rate? Additionally, would a generational ship traveling to a star say 50 ly from here with current propulsion technology actually be able to remain intact without some kind of ablative armor or shielding, or would micrometeoroids eventually erode the hull til it breeches?

Hello, I'm John. This is my first time here. I wanted to get like a 12 can cooler bag and make it with a battery pack so that it is cooled by a compressor or something. I was wondering if you guys knew something that is small enough to fit inside the cooler bag and still leaves room for things.

How do you calculate how many grams of kilograms of neodymium you need in order to build a permanent magnet motor with, let's say 10kw power? Thanks wasn't sure which forum to choose to post this.

Hello all. Would a container like made of a thin flexible material -like silicone- Exposed to sound waves; and a microphone on the cap at the neck, yield louder readings by amplifying all contractions/expansions of the spheric portion into a longitudinal up/down vibration into the neck ? In other words, a microphone in a tube attached to the neck of an elastic balloon; would it behave as a sound magnifier ? Would it be similar to a microphoned hearing funnel ? And the narrower the neck, the greater the magnification ?

Hi, I understand the principle of how PDAF (Phase Detection Auto Focus) works. Look at the image I inserted. I don't understand how the incoming light splits into two rays of light in the two extreme sides of the lens. Why aren't lots of rays of light coming all over the lens? Source: https://photographylife.com/how-phase-detection-autofocus-works

Hi, Let's say that the watch in this example is AMOLED so that the battery usage depend on the color of the display: When smart watches go to ambient mode the background of the screen turn dark (in most cases, some just reduce brightness of the screen) and the rest of the watch face turns white. I wonder why the rest of the watch face turn white, which is the most battery consuming color to display, rather than red for example, which only require the red led to light up? I know that it's easier to see white, but red would save more battery.

Please pardon the crude illustration, this is merely meant to make it clearer where I'm going with this. I'm picturing a power source; I'm not sure whether it's already covered under the "geothermal" umbrella or not; that uses the heat of volcanoes to turn turbines through steam. The idea is that water would be pumped into an active volcano, and a tube would be placed at or near the top to contain the resulting volcanic gases (or at least most of them) and use the force applied by their escaping; or at least from the steam escaping; to turn turbines. This leaves me with a few questions. 1. Would this be a "renewable" resourc…