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∙ 10y ago
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Is burning a fire work a physical or chemical change?
chemical
What energy is used for a fire to work?
Chemical energy!
Is a atomic bomb physical or chemical change?
Work of an atomic bomb is a physical process.
Is fire work bursting into flames a phsical or chrmical change?
Chemical
What chemical reaction will be needed in a fire work?
you would need warmth
How does a Wet chemical Extinguisher Work?
it takes one of the elements of the fire triangle
Is curdling of milk physical or chemical?
Chemical. It's a reaction with oxygen. If it were physical it would be fairly easy to undo...If you work out how to uncurdle milk then please let me know!
What is the energy in a chemical or physical change that is available to do useful work?
Free energy
Is atomic bomb a chemical change?
Work of an atomic bomb is a physical process.
Which chemical element imparts the yellow colour observed in fire work displays?
Sodium
Is dissolving salt in water a a chemical change or a physical change?
It is a physical change as it can be "undone" by evaporating the water. An simple example of a chemical change is baking a cake, you can't un-bake a cake. To work out whether it is a chemical or physical change just think whether it can be undone or not.
What are three typed of chemical weathering?
Chemical(acid in rainwater dissolving limestone), biological (work of animals and plants) and physical (freeze thaw)
