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☆☆☆☆☆When you want to heat something!!
well wen it is closed is when it is at its hottest, its a heating flame, open is for safety that's when it is at its coolest like a safety flame.
what i rote when you want to heat something is rong at the top. that's for if it is closed
It is a law that states that the total amount of energy in a system is always the same, and that energy cannot be created or destroyed
Isotope are atoms of the same element that has the same number of protons and electrons but different number of neutrons.
we should not wear synthetic clothes while working on a kitchen or laboratory because synthetic clothes catch fire easily
Ionic bond.
Some units are the cubic meter, the cubic decimeter (= liter) and the cubic centimeter (= milliliter).
