science

why does a candle appear to go out when a copper coil is placed over the flame?


Combustion requires three things: fuel (wax here), oxygen (air here),
ignition temperature (a match here probably). Remove one and the combustion
stops -- that's the principles firemen use to put out fires. In the case of
your candle the high thermal conductivity of copper probably is conducting
sufficient heat from the flame that the flame goes out, but the heat
capacity of the melted wax, wick, etc. probably "holds" enough heat that the
temperature exceeds the ignition temperature if the copper wire is removed.
If this mechanism is operating you can test it by holding the copper coil
around the flame area for some time, so that the molten wax and wick cool,
the flame will not re-ignite when you remove the copper coil

Source:
http://www.newton.dep.anl.gov/askasci/phy00/phy00529.htm

  1. 👍 0
  2. 👎 0
  3. 👁 56
asked by jenna

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physics

    a uniform magnetic field of strength 0.5T is directed at an angle of 30degree to the plane of 100turns regular copper coil of lenght 0.04m and width 0.05mm. the diameter of the copper wire which makes up a coil is 1mm and the

    asked by Akin on July 12, 2016
  2. Physics

    A circular conducting coil with radius 3.40 cm is placed in a uniform magnetic field of 1.090 T with the plane of the coil perpendicular to the magnetic field. The coil is rotated 180° about the axis in 0.222 s. (a) What is the

    asked by Alyssa on February 17, 2013
  3. Physics 2017

    I have a coil of copper wire. I want to know the length of the wire in the coil. I do not wish to unwind the coil and measure the length directly. I find from a table of densities that the density of copper is 8.89x10^3kg/m^3.

    asked by Z on March 9, 2017
  4. science

    if a magnet is moved in and out of a coil of a copper wire, electrcity begins to flow through the coil. True or False If the coil is in a closed circuit then electricity will flow, if not there will be only an induced emf.

    asked by julie on June 7, 2007
  5. Physics Help pls

    Consider two single turn coils labeled 1 and 2 that are positioned close to each other. The switch S has been open for a long time. If the switch is now closed and the current through coil 1 is in the direction shown and

    asked by aaka on December 16, 2013
  6. Physics pls help

    Consider two single turn coils labeled 1 and 2 that are positioned close to each other. The switch S has been open for a long time. If the switch is now closed and the current through coil 1 is in the direction shown and

    asked by aaka on December 16, 2013
  7. PHYSICS

    Consider two single turn coils labeled 1 and 2 that are positioned close to each other. The switch S has been open for a long time. If the switch is now closed and the current through coil 1 is in the direction shown and

    asked by aaka on December 15, 2013
  8. math (rate)

    A blue candle is twice as long as a red candle. The blue candle takes 6 hours to burn out, and the red candle takes 15. After 5 hours, what fractional part of each candle is left? The blue candle's length is what fraction of the

    asked by Preston on January 17, 2007
  9. Science-Urgent

    I did an experiment on a burning candle, and I need help with some of the questions. Thank you very much in return. Please no websites.--more information would be appreciated, thanks:-) I'll list everything of what we went

    asked by Sara on April 6, 2010
  10. physics

    A magnetic field is applied to the plain of a flat coil of copper wire. The time variation of the magnetic flux density is given by Bosinwt.At which of the following values of t is the magnitude of the emf induced in the coil a

    asked by Roy on September 28, 2013

More Similar Questions