The Hydrogen bonds are broken and reformed
Any type of heat styling tool does damage to the hair. To help prevent damage I recommend you use a thermal hair protectant. Matrix Sleek Look has an awesome line in thermal styling products. I would also use a deep condition to help bring moisture back into your hair from the drying effects of heat styling tools.
The drying itself is (always) a physical change.
lighting a match from a matchbox is a chemical change.
Ignition of a match is a chemical process.
No, it is the same as drying the bottom of your hair.
Drying (involving only the water evaporation) is a physical change.
A hair nozzle is an attachment for a hair dryer that directs airflow to achieve specific styling results. It helps concentrate the heat on a particular section of hair, making it easier to smooth or straighten strands, enhance volume, or create defined curls. Nozzles can also reduce frizz by allowing for more controlled drying and styling. Overall, they enhance the efficiency and effectiveness of blow-drying and styling hair.
Yes.
In the natural unstretched state the hair is Alpha Keratin and when the hair has been styled in the unnatural state it is beta keratin. When blow drying for example the keratin in the alpha keratin is changed to beta keratin, causing the hair to temporarily in its new shape. Once the hair takes in moisture from the atmosphere or becomes wet, it reverts back to the normal state
Physical, it is still H2O
Nothing if you try it then maybe you will see
A physical change