Answer:
313 K or 40 degree celsius.
Explanation:
Initial
, 


Now, final


Combined the ideal gas law

Therefore, the final temperature of ideal gas is 313 K.
Answer:
the object will not return to the original position because it will not have any forces helping it to go up the hill
the center of mass falls since it is going downwards
Hope this helps!! have a great day
Explanation:
(C) have the same heat capacity
A: makes work easier to do.