• No one can answer my question )=?

    Why is a Kettle Lead called a Kettle Lead?
    Why is a Kettle Lead called a Kettle Lead?
    15 answers · 1 day ago
  • Are flying cars impossible to happen?

    21 answers · 4 days ago
  • What is an engineer called that works on everything?

    Works on land, sea, electricity, construction....every thing in the entire world. Not just an engineer, this would be like a ....super engineer.
    Works on land, sea, electricity, construction....every thing in the entire world. Not just an engineer, this would be like a ....super engineer.
    12 answers · 2 days ago
  • In areoplane,do we get shock?

    I do not mean lightining,I mean electrical gadgets inside plane. I mean it is in air so it is not connected to ground so will person get shock.No ground so no shock.
    I do not mean lightining,I mean electrical gadgets inside plane. I mean it is in air so it is not connected to ground so will person get shock.No ground so no shock.
    7 answers · 16 hours ago
  • Is there anyway to amplify current while reducing voltage?

    Hi guys, I need help on my project. My project s objective is to harness electricity from sea water using simple chemical cell using copper and aluminium plates. So far, it has been able to generate 35v but the current is too low, around 0.1mA. I m looking forward to lower the voltage and increase the current to... show more
    Hi guys, I need help on my project. My project s objective is to harness electricity from sea water using simple chemical cell using copper and aluminium plates. So far, it has been able to generate 35v but the current is too low, around 0.1mA. I m looking forward to lower the voltage and increase the current to store the energy in a standard power bank. Is there anyway to do this? Maybe schematics for a simple board? Thanks for your help
    8 answers · 2 days ago
  • If Robots take over jobs, somebody has to build those robots?

    In order for robots to take our jobs we need people to build those robots. This would indicate that robot-building will be a career that will always require humans. But if robot-building is automated, meaning a robot builds another robot, who will build that robot and that robot and so on till eternity. YOU WILL... show more
    In order for robots to take our jobs we need people to build those robots. This would indicate that robot-building will be a career that will always require humans. But if robot-building is automated, meaning a robot builds another robot, who will build that robot and that robot and so on till eternity. YOU WILL NEED humans to build it.
    8 answers · 2 days ago
  • ARE ISLAMIC MOSQUEs very well designed in your view ON AVERAGE?

    Best answer: there's not one in my town but i would love to visit one and other houses of worship 'cause i wish to honor all religions and not be judging
    Best answer: there's not one in my town but i would love to visit one and other houses of worship 'cause i wish to honor all religions and not be judging
    31 answers · 1 week ago
  • Is California a place with lots of opportunities for chemical engineers?

    And if so, are most of them able to afford it without great difficulty as I have heard that CA is quite expensive?Also which cities/areas have the most job op's?
    And if so, are most of them able to afford it without great difficulty as I have heard that CA is quite expensive?Also which cities/areas have the most job op's?
    6 answers · 2 days ago
  • How to change a push to make switch to a push to break switch?

    I am currently designing a keypad circuit and it requires a push to break switch to reset (to break the flow of the circuit created by the thyristor), is there any way of making a 4 by 3 keypad button to act as a push to break?
    I am currently designing a keypad circuit and it requires a push to break switch to reset (to break the flow of the circuit created by the thyristor), is there any way of making a 4 by 3 keypad button to act as a push to break?
    8 answers · 3 days ago
  • Are mechinecal engineers are mindless???

    4 answers · 8 hours ago
  • Why the resistance in dc distribution system for the length of 100 meters(length of distributer) is assumed as r/2?

    Best answer: If something is an assumption then it is not open to question. It is already assumed. You cannot ask "why" unless the assumption conflicts with other given conditions of which you do not provide any. All of your other answers create such a conflict by also assuming two (one go and one return) conductors... show more
    Best answer: If something is an assumption then it is not open to question. It is already assumed. You cannot ask "why" unless the assumption conflicts with other given conditions of which you do not provide any. All of your other answers create such a conflict by also assuming two (one go and one return) conductors in series which gives 2r but you do not specify that.

    A valid implication of your assumption may be that r = the resistance of 400 m of conductor.

    Please award one of your answers "Best Answer". We especially appreciate this particular small recognition of our efforts to assist.
    5 answers · 2 days ago
  • Is the earth actually a wonky circle shape?

    Is the earth actually a wonky circle shape?

    its not flat, and its not round, apparently its a fcked up circle I know ****-all about the earth and science-y ****, , I'll just leave this photo here tp make myself feel smart for researching. someone comment how intelligent I am please XD
    its not flat, and its not round, apparently its a fcked up circle I know ****-all about the earth and science-y ****, , I'll just leave this photo here tp make myself feel smart for researching. someone comment how intelligent I am please XD
    9 answers · 5 days ago
  • Engineering. Why are some pressure gauges partially filled with a liquid?

    Best answer: Lubrication of the rack/ pinion linkage between the Bourdon tube and the indicator needle and its bearings, and/ or damping of the mechanism where the (whatever fluid) is pulsating, which would cause rapid wear of said rack/ pinion.
    Best answer: Lubrication of the rack/ pinion linkage between the Bourdon tube and the indicator needle and its bearings, and/ or damping of the mechanism where the (whatever fluid) is pulsating, which would cause rapid wear of said rack/ pinion.
    4 answers · 1 day ago
  • Can i use Japanese appliance in US (please read ENTIRE post detail)?

    Best answer: YES, JAPANESE 100V HUMIDIFIER NO TROUBLE TO WORK IN USA EVEN WITH A BIT HIGHER USA VOLTAGE BETWEEN 115V TO 120V. HOWEVER, BECAUSE VOLTAGE IS 15V HIGHER, THE HEATING BECOMES FASTER AND MOTOR SPINS A BET FASTER AND A BIT WARMER ON MOTOR BODY. JUST REPLACE THE POWER PLUG WITH USA PLUG SHALL DO THE JOB. BUT... show more
    Best answer: YES, JAPANESE 100V HUMIDIFIER NO TROUBLE TO WORK IN USA EVEN WITH A BIT HIGHER USA VOLTAGE BETWEEN 115V TO 120V.
    HOWEVER, BECAUSE VOLTAGE IS 15V HIGHER, THE HEATING BECOMES FASTER AND MOTOR SPINS A BET FASTER AND A BIT WARMER ON MOTOR BODY.
    JUST REPLACE THE POWER PLUG WITH USA PLUG SHALL DO THE JOB. BUT EXPECTING IT USES MORE ELECTRICITY ( 15% MORE THAN IN JAPAN ) AND MIGHT NOT LAST SO LONG LIFE AS RUNNING IN JAPAN 100V POWER SOURCE.
    4 answers · 1 day ago
  • How do you calculate voltage drop in a 12v system when dealing with a 30 ohm resistor and a 3 watt incandescent light bulb?

    Best answer: Edited and corrected. (Sorry) You will have to assume that the bulb us rated 3 W @ 12 V. Then 3W/12V= 250 mA and 12V/250 mA = 48 Ohms or 144/3 = 48 (P=V^2/R) (This is typical of miniature bulbs) The load is now 30+48=78 Ohms. V drop on resistor is 12×30/78=4.62V Drop on bulb is 12×48/78 = 7.38V Add an update with... show more
    Best answer: Edited and corrected. (Sorry)
    You will have to assume that the bulb us rated 3 W @ 12 V.
    Then 3W/12V= 250 mA
    and 12V/250 mA = 48 Ohms
    or 144/3 = 48 (P=V^2/R)
    (This is typical of miniature bulbs)
    The load is now 30+48=78 Ohms.
    V drop on resistor is 12×30/78=4.62V
    Drop on bulb is 12×48/78 = 7.38V
    Add an update with more detail, or
    questions for a better answer, and please choose a best answer from
    among those you get.

    I have your comments, and you are correct that Tungsten's
    resistance increases 10 times from room temp to operating
    temp. Tungsten (and many other materials are known as
    "non-Ohmic"loads for this reason.
    To correct for temperature, begin with Ro (Resistivity at room
    temperature) and calculate resistance. Let T be room
    temperature and "a" be the temperature coefficient
    (.004403 for Tungsten)
    Then: Resistance = Ro[ 1+a(T-To)]
    However, you do not know the temperature and can't
    estimate it without filament properties.

    The solution you have is within the scope of the
    question (as stated).
    5 answers · 2 days ago
  • Unusual electrical symbol on aircraft schematic diagram?

    Unusual electrical symbol on aircraft schematic diagram?

    On aicraft schematic/wiring diagram I found this electrical symbol. To the above case I found it on a DC line and to the under case I found it on AC 3 phase line. I found the same symbol also on a ground (earth) line. It must be related to the connectors which pass through these 3 different cases. Does anyone know... show more
    On aicraft schematic/wiring diagram I found this electrical symbol. To the above case I found it on a DC line and to the under case I found it on AC 3 phase line. I found the same symbol also on a ground (earth) line. It must be related to the connectors which pass through these 3 different cases. Does anyone know exactly what does this symbol mean? Please no assumptions only certain answers. Thank you in advance.
    4 answers · 6 days ago