What is the physical and chemical reaction of burning gasoline and melting gold

there actually is a physical change, in that the gasoline must first evaporate before it burns. However, the question is asking about the burning, which is a chemical change. Burning does not include the physical change of evaporation.Melting of gold chemical or physical change

2 Answers. Melting is the physical change, temperature and melting points are physical properties. Simply adding heat to a substance doesn't necessarily mean that chemical bonds will be broken or formed. Metallic bonds are not usually considered to be chemical bonds, although it really depends on how you look at them.

Explanation:

hi there!

out of the two, (b) precision would be more reasonable.   however, both a and b could be pretty reasonable.

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that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

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