What can be used to extinguish magnesium fires?
The water, fire blanket and carbon dioxide fire extinguisher cannot be used for extinguishing magnesium fires. Burning magnesium is usually quenched by using a Class D dry chemical fire extinguisher, or by covering the fire with sand to remove its air source.
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Does the candle burn more or less violently in zero gravity?
about the same
How does the candle flame look like in zero gravity?
it is the same as on Earth surface
it is spherical
it is not formed at all