Adding hot water to pot noodle is a physical change because the chemical nature of water remain unchanged.
This is a physical process.
Adding water (which is not a reactant) is a physical process.
Physical because, the lemonade dissolves into the water, without creating any of the chemical changing results.
Physical
Adding cornflour to water is a physical change. The reason this process is classified as such is that it does not change the chemical identities of the substances involved, which is the criterion for a process to be considered a chemical reaction. Technically, the cornflour would slowly hydrolyze in water, which would be a chemical reaction.
This depends. Are the pot noodles dry at room temperature? Then not yet .Are the pot noodles in boiling water? Is the water you are adding from the cold water tap? Then, Yes, as boiling will stop until the new water is at boiling temperature.
Yes, because it is reversible
This is a physical process.
No. That is a physical change of the liquid water turning to gas (steam)
No. It is a physical change.
The salt kills germs on the noodles.
Adding water (which is not a reactant) is a physical process.
Dissolving silver nitrate in water is a chemical process.
Physical because, the lemonade dissolves into the water, without creating any of the chemical changing results.
It is a physical change, as the nature of the sand remains the same, only its position is changed by wave action.
Physical, because you are only diluting the tea, but not creating a new substance.
The best way to cook 2 minute noodles is by boiling the water, then removing the boiled water from heat, then adding the noodles to steep. The result will make perfectly tender noodles.