Melting, oiling, and bending, are considered physical changes but burning is a chemical change. explain why this is so.

Burning a substance means that you have damaged it, and this is irreversible, which is a quality that chemical changes have. Burning a substance also changes the substance into ash, which makes it a chemical change as the substance has been formed into something else.

I hope this helps!

4. 50x10= 500m/s 5. 52m/s

Centrapedial force is the answer