Can you guys tell me if any of these are wrong? My science teacher said some were but I’m not sure which ones

How does mass affect the speed of an object

Which notation is used to represent an alpha particle? a. b. c. d.

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final