My answer is luminous flame because it is used commonly here in our country Philippines but it is never be used for heating because it deposits too much soot. But it is easier to see, less hot and safer.
When the flame takes on the color of blue this means that the fire is at the highest temperature. The fire is at its hottest and may take lesser time to heat whatever needs to be heated.
Methane (natural gas) is the most commonly used gas for residential heating. In rural areas where there are no pipes carrying natural gas and in recreational vehicles, propane and butane are commonly used.
The copper flame has a more energetic radiation.
yellow
For Flame Libra T125ES the only adequate part is Flame, which can be obtained from the infinitely more useful Flame Sagittario C145S. As a result, there is little or no reason to buy this Beyblade.
When the flame takes on the color of blue this means that the fire is at the highest temperature. The fire is at its hottest and may take lesser time to heat whatever needs to be heated.
"economical" has no comparative or superlative form. You would say "more economical" or "most economical."
Methane (natural gas) is the most commonly used gas for residential heating. In rural areas where there are no pipes carrying natural gas and in recreational vehicles, propane and butane are commonly used.
Blue flame. because it does not have carbon
The copper flame has a more energetic radiation.
There is no right answer for that. Kinds of both soft and hard are economical.
A blue flame is hotter than a yellow flame because a blue flame has more oxygen, so it has more energy to create extra heat. Therefore, a blue flame is more dangerous and a yellow flame is used in laboratories. The hottest part of the blue flame is right under the middle, this part is called the crown !!
yellow
the yellow flame
By increasing the size of the opening at the base, allowing more oxygen to the flame. The hottest flame is the blue flame.
It is easier more economical
blue flames are hotter