I believe the 4th answer is the correct one for four and number five I believe is 33 degrees. I hope this helped.
Is a physical change because only the state of the matter has changed.
Physical changes can often be reversed. Allowing the water to evaporate will return the salt to a solid state.
It has not combined with the water to cause an irreversible chemical reaction.
Answer: a. ) What is the magnitude of their average acceleration (in m/s2)
If they both have the same kinetic energy then they both have the same kinetic energy. otherwise it would be the bowling ball due to factors like weight
