• How to fix this solar panel?

    How to fix this solar panel?

    I am very new to electronics, electronics is only my hobby. + contact broke off (see picture) when I was soldering a wire to it. Now multimeter reads 0V. I tried to make another contact but the solder wants to stay on the top of the iron and won´t stay in place of the + contact. What can I do?
    I am very new to electronics, electronics is only my hobby. + contact broke off (see picture) when I was soldering a wire to it. Now multimeter reads 0V. I tried to make another contact but the solder wants to stay on the top of the iron and won´t stay in place of the + contact. What can I do?
    4 answers · 1 hour ago
  • Should I become a welder?

    So I’m currently in welding II in highschool which is basically advancing welding. And I’m thinking of taking four years of it. I find it kind of rewarding finishing welds and I don’t mind getting dirty. But should I?
    So I’m currently in welding II in highschool which is basically advancing welding. And I’m thinking of taking four years of it. I find it kind of rewarding finishing welds and I don’t mind getting dirty. But should I?
    8 answers · 4 days ago
  • Flying cars are never going to happen are they?

    Best answer: No, you are right. Any 'flying cars' that are built are purely experimental. Some may be used, but would need to be regulated by aviation standards. Of course, once driven onto public roads, they would then be subject to roadworthy standards. There is no way they would be allowed to land or take off on... show more
    Best answer: No, you are right. Any 'flying cars' that are built are purely experimental. Some may be used, but would need to be regulated by aviation standards. Of course, once driven onto public roads, they would then be subject to roadworthy standards. There is no way they would be allowed to land or take off on public roads, either.
    Then there are practical things like maintenance, if your car stops on a road you pull over and call for road service. If your flying car stops, you can't pull it up to the nearest cloud. It would need to descend to ground. In a crowded city?
    Also practically, aren't cars dangerous enough only moving along made road surfaces in 2 dimensions, without adding a 3rd. dimension like height? Can you imagine the carnage with crowded skies! No- one would be safe even within their homes from crashing flying cars.
    Never. Cannot happen.
    13 answers · 6 days ago
  • Which is the Better Way of Running a Pump?

    Background: A pump used to pump down a holding tank in the wastewater treatment industry operating off a VFD. Which is better: Run the pump for longer periods of time, at lower speeds, turning on/off less? OR Run the pump for shorter periods of time, at higher speeds, turning on/off more? In Terms of: Pumping... show more
    Background: A pump used to pump down a holding tank in the wastewater treatment industry operating off a VFD. Which is better: Run the pump for longer periods of time, at lower speeds, turning on/off less? OR Run the pump for shorter periods of time, at higher speeds, turning on/off more? In Terms of: Pumping efficiency Wear & tear on the motor Energy savings Anything else you could think of...
    6 answers · 3 days ago
  • Flashlight using series vs. series batteries, which brighter? Longer life?

    All other things being equal, if one flashlight is a stubby one using 2 batteries side by side (parallel), the other flashlight is a long and narrow one using same 2 batteries but end to end (series). Which is brighter? Which lasts longer?
    All other things being equal, if one flashlight is a stubby one using 2 batteries side by side (parallel), the other flashlight is a long and narrow one using same 2 batteries but end to end (series). Which is brighter? Which lasts longer?
    6 answers · 3 days ago
  • Chinese inverters work well but have no fuse. What do you think about the size of the in-line fuse I put on the 3000-watt inverter I bot?

    Fuse is 30 amp. Inverter is 12-volt dc to 110 ac, output is 50/60 Hz. Rated 3000 watts and can handle surges to 6000.
    Fuse is 30 amp. Inverter is 12-volt dc to 110 ac, output is 50/60 Hz. Rated 3000 watts and can handle surges to 6000.
    4 answers · 2 days ago
  • Could someone simply explain to me why this slope of a line formula looks so different in this power point slide example?

    Could someone simply explain to me why this slope of a line formula looks so different in this power point slide example?

    y = mx+b but then it changes to (x value - x min)/(x max - x min) x (y max - y min) + y min We were converting 4 - 20 mAmps to 1 - 5 volts.
    y = mx+b but then it changes to (x value - x min)/(x max - x min) x (y max - y min) + y min We were converting 4 - 20 mAmps to 1 - 5 volts.
    4 answers · 3 days ago
  • Which college is best to attend for the Engineering Program?

    Best answer: Unless you can get a full scholarship to one of the very top five or so rated schools, you should consider one of the state engineering schools in your home state. You will pay in state tuition, much cheaper. You can get a fine engineering education from most schools. If you want the super job that only the super... show more
    Best answer: Unless you can get a full scholarship to one of the very top five or so rated schools, you should consider one of the state engineering schools in your home state. You will pay in state tuition, much cheaper. You can get a fine engineering education from most schools. If you want the super job that only the super smartest people from the best schools get to apply to, then you want MIT, Caltech, Stanford, etc. If you only want to be in where the 99.99% of the jobs available, most engineering schools can give you a good engineering education.
    4 answers · 5 days ago
  • What is underground cable?

    5 answers · 6 days ago
  • Bernoulli's principal VS Newton's third law?

    Bernoulli's principal states that fluids moving faster causes a low pressure area, This is commonly used to explain lift on aircraft wings. The equal transit theory states air moving over an airfoil must join up at the end, This isn't true and has been proven wrong many times, Especially by Cambridge... show more
    Bernoulli's principal states that fluids moving faster causes a low pressure area, This is commonly used to explain lift on aircraft wings. The equal transit theory states air moving over an airfoil must join up at the end, This isn't true and has been proven wrong many times, Especially by Cambridge university. Although newtons third law states "To every action there is always opposed an equal reaction.". This is applied to airplanes in multiple ways; Flow turning: https://www.grc.nasa.gov/www/k-12/airpla... And angle of attack: https://www.grc.nasa.gov/www/k-12/airpla... (Explained as wrong by nasa) Ovbiously, Planes can generate lift from air bouncing off the wings but its very inefficient, I've seen someone say Bernoulli's principal only accounts for less than 5 percent of the lift, Is this true? Currently I believe in the flow turning since it does make more sense and it is more of a efficient theory but my opinion has changed multiple times and it would be nice to have a definite answer. Thanks!
    5 answers · 7 days ago
  • Is this what a burnt out resistor looks like?
  • Why are the V-I characteristics of a diode piecewise linear on a CRO?

    I obtained the characteristics of both a Zener and an ordinary diode on a CRO in my lab today, but instead of getting the traditional curve at the cut-in and the breakdown voltages, I simply got straight lines. Any explanation for this? Please help
    I obtained the characteristics of both a Zener and an ordinary diode on a CRO in my lab today, but instead of getting the traditional curve at the cut-in and the breakdown voltages, I simply got straight lines. Any explanation for this? Please help
    6 answers · 1 week ago
  • To design a heat exchanger for a Steam generator, what material should I use: 316 stainless steel or brass tubes? which is better for me.?

    I am designing a heat exchanger for a steam generator, the customer ask me to give 316 stainless steel and brass tubes for him to chose. I don't quite understand what is better for a steam generator heat exchanger.
    I am designing a heat exchanger for a steam generator, the customer ask me to give 316 stainless steel and brass tubes for him to chose. I don't quite understand what is better for a steam generator heat exchanger.
    6 answers · 1 week ago
  • I am working on a space time distortion machine, but I need a lab to test the device to make sure of this. Where would one like that be?

    Best answer: Stanford Linear Accelerator, Stanford University, Stanford California. They worked on President Regans Star Wars weapons project, and the neutrino pulse weapon project.
    Best answer: Stanford Linear Accelerator, Stanford University, Stanford California. They worked on President Regans Star Wars weapons project, and the neutrino pulse weapon project.
    6 answers · 1 week ago