An atomic bomb uses fission-- the splitting of atoms. It is purely a physical change, at first. Any gases produced in the air surrounding the explosion (which occurs before it touches the ground), along with the intense heat produced, causes chemical changes in the air.
This is a physical change. Water can take on 3 forms, ice, gas, and liquid. These would be changes in state. Tearing, scratching, crushing, change in state, are all physical changes. Chemical changes must change the substance, not just the appearance. (i.e. Burning fire into ashes, fireworks exploding...)
Physical change: Water freezing into ice Chemical change: Water being broken down into hydrogen and hydroxide ions after the addition of a pure metal.
Physical change of the paint, not the door.
this is a physical change
An explosion is the sudden release of a volume of compressed gas. The chemicals remain the same, so it is only a physical change.Note that the reaction resulting in an explosion may be a chemical change, but the resulting pressure changes are not.
It is usually a chemical change.
Dynamite exploding is a chemical change called combustion.
no its a chemical reaction
It is a chemical change.
Yes because it cannot change back.
physical
Work of an atomic bomb is a physical process.
Fuel exploding is a violent Chemical Reaction when fuel is reacted with atmospheric oxygen.
Dissolving and fizzing are physical processes.
exploding fireworks
I guess it is a chemical change as the exploded fireworks cant be regained back which is possible in a physical change and not in a chemical change.
It is a chemical reaction because it changes and the change can't be revesed