PLEEASEE HELP ITS PAST DUE AND IM GIVING BRAINLIEST Which process is an example of a physical change?

a. wood burning in a camp fire
b. iron rusting on a bicycle chain
c. ice melting after a snow storm
d. milk souring because it is old

c or d

Explanation:

i dont know which one but it's one of those

c or a it's both of them but if you have to pick one pick c because I know that is defitnely a physical change.

Explanation:

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.