7. b and 8. c i attached the photo for u to see how i did it
Answer: Remember that velocity includes the speed and direction of an object. Therefore, a change in velocity can be either a change in how fast something is moving or a change in the direction it is moving. occur all around you as objects speed up,slow down, or change direction.
Explanation:
Not sure if this is multiple choice but this is what I say.
Wind, composition of the tombstone and the PH level f any moisture that may come in contact with the tombstone.
Hope this helps if I'm not too late :)
I think it should be d because you can't measure gas and its mass but you do you man
