• Why are Toasters open on top?

    Best answer: cause you need thenn open to put the toast in
    Best answer: cause you need thenn open to put the toast in
    20 answers · 4 days ago
  • Why do different countries use different mains voltage?

    Looking at the different mains voltages used around the world it seems there are basically only 2 types - the 110-120 volt systems they have in America, or the 220-240 volt systems used mostly everywhere else. Why is one almost exactly double the other? Is there any advantage to having a higher voltage? If... show more
    Looking at the different mains voltages used around the world it seems there are basically only 2 types - the 110-120 volt systems they have in America, or the 220-240 volt systems used mostly everywhere else. Why is one almost exactly double the other? Is there any advantage to having a higher voltage? If household appliances can run efficiently on 110 volts then what is to be gained by doubling the voltage? Will I be able to cook a casserole and vacuum my rug in half the time? Will my lights be twice as bright? Will I die twice as quickly if I stick a fork into an outlet? The nominal mains voltage in Australia for example is 230 volts but a recent news story shows that the voltage on the grid is almost always at the maximum allowable tolerance of 255 volts, this has the unfortunate effect of inflating power bills and rendering expensive solar back-up systems completely useless. Are we stuck with this madness or is there a solution?
    8 answers · 3 days ago
  • How does an electric motor "know" how much amperage it needs to start vs run?

    I know that there is no processor, it's purely mechanical. The amps go up to start it and go back down. What is governing this action?
    I know that there is no processor, it's purely mechanical. The amps go up to start it and go back down. What is governing this action?
    6 answers · 2 days ago
  • Are you getting ready to take the microchip in your hand?

    The framework for the microchip is already in place. Most stores have contact-less payment for chipped cards and modern security doors have the same. Phones and computers could easily be made compatible. The problem will be fraud and people tampering with the chip, so next it will be stuck in your brain where you... show more
    The framework for the microchip is already in place. Most stores have contact-less payment for chipped cards and modern security doors have the same. Phones and computers could easily be made compatible. The problem will be fraud and people tampering with the chip, so next it will be stuck in your brain where you can't tamper with it, or stop it playing with the brain signals.
    14 answers · 6 days ago
  • Is it possible to make a diesel engine that works entirely without electricity?

    Best answer: It's only more modern / smaller diesels that use electronically controlled fuel injection that cannot run without electricity. "Traditional" diesels that have mechanical fuel injection pumps will work fine with no electrical system whatsoever. (They then need a hand crank, a "bump start" or... show more
    Best answer: It's only more modern / smaller diesels that use electronically controlled fuel injection that cannot run without electricity.

    "Traditional" diesels that have mechanical fuel injection pumps will work fine with no electrical system whatsoever.
    (They then need a hand crank, a "bump start" or a donkey engine to start them - but the engine itself will work just fine).

    Small Lister Petter engines are a good example of a hand-cranked diesel with no electrics.
    See the videos below. The lever on the cylinder head is a "decompressor", it holds one of the valves open so there is no compression in the cylinder(s), allowing the engine to be turned easily by the hand crank.
    That allows it to be "spun up" and the momentum can then carry it through a compression cycle when the decompressor is released, so it (hopefully) fires and starts.

    https://www.youtube.com/watch?v=NuWTPbG_...
    https://www.youtube.com/watch?v=i5BnObhe...

    And a much bigger non-electric start - a "donkey engine" system on a bulldozer.
    A donkey engine is a small engine that can be eg. hand-cranked to start it, that then works via a clutch to turn over the large diesel, instead of a big electric starter motor.

    https://www.youtube.com/watch?v=LK4df0sg...
    4 answers · 1 day ago
  • Math help?

    It takes the hot water faucet 4 times as long to fill a bathtub as it does the cold water faucet. Left on together, the cold and hot water faucets take 3 minutes to fill the tub. How long will it take the cold water faucet to fill the tub by itself?
    It takes the hot water faucet 4 times as long to fill a bathtub as it does the cold water faucet. Left on together, the cold and hot water faucets take 3 minutes to fill the tub. How long will it take the cold water faucet to fill the tub by itself?
    5 answers · 2 days ago
  • You re an engineering student.You have no money but won a scholarship because you re smart.You have to make ends meet though.?

    Best answer: You can work part time while earning your degree. Lots of people do that.
    Best answer: You can work part time while earning your degree. Lots of people do that.
    6 answers · 4 days ago
  • Gas tanks on a Gasoline Tanker Truck ?

    Seems ironic and redundant to have a tanker truck that ultimately hauls tens of thousands of gallons of GASOLINE equipped with its own gas tanks . Certainly, gasoline is part of the cost of operating the truck , and it's source could be built into( and cost lowered) by using gasoline from the load itself . ,
    Seems ironic and redundant to have a tanker truck that ultimately hauls tens of thousands of gallons of GASOLINE equipped with its own gas tanks . Certainly, gasoline is part of the cost of operating the truck , and it's source could be built into( and cost lowered) by using gasoline from the load itself . ,
    9 answers · 6 days ago
  • How difficult is aerospace engineering?

    Best answer: It is literally what the term "rocket science" refers to. But of course, this field also includes airplanes, helicopters, etc. And yes, it's pretty difficult, like any other form of engineering is. It requires a lot of different forms of science to be applied.
    Best answer: It is literally what the term "rocket science" refers to. But of course, this field also includes airplanes, helicopters, etc. And yes, it's pretty difficult, like any other form of engineering is. It requires a lot of different forms of science to be applied.
    4 answers · 4 days ago
  • Can Jews melt steel beams?

    Can Jews melt steel beams?

    Best answer: no , it was the thousands of pounds of nano thermite that was planted in the center core .
    Best answer: no , it was the thousands of pounds of nano thermite that was planted in the center core .
    4 answers · 4 days ago
  • Sandra went to a coffee shop . She paid $54 for four cups of cappucinno and three cups of filter coffee . SIMULTANEOUS EQUATIONS !? Help!?

    Sandra went to a coffee shop . She paid $54 for four cups of cappuccino and three cups of filter coffee . if a cup of cappuccino cost $3.00 more than a cup of filter coffee , calculate how much a cup of each type of coffee costs.
    Sandra went to a coffee shop . She paid $54 for four cups of cappuccino and three cups of filter coffee . if a cup of cappuccino cost $3.00 more than a cup of filter coffee , calculate how much a cup of each type of coffee costs.
    7 answers · 6 days ago
  • How many volt charge controller produce when charge controller is not connected to battery only connected with solar panel?

    looks like my charge controller not working. when charge controller is not connected to battery voltage is same with solar panel(16-20v). when charge batteries with it. my 60ah battery voltage reach 15v in 40 minutes. before charge, batteries were unable to start car. i have 20w solar panel, pwm charge controller
    looks like my charge controller not working. when charge controller is not connected to battery voltage is same with solar panel(16-20v). when charge batteries with it. my 60ah battery voltage reach 15v in 40 minutes. before charge, batteries were unable to start car. i have 20w solar panel, pwm charge controller
    3 answers · 5 days ago