What are 2 ways acceleration can be changed?

What would be the result of an alpha particle coming into a magnetic field? a) the alpha particle will stop moving. b) the alpha particle will reverse its direction. c) the alpha particle will be deflected in a curve path. d) the alpha particle will continue to travel in a straight line.

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat

Which form of pure carbon is so hard that it can be used in cutting tools?