Conduction. Any material that easily allows heat to move through it. Vacuum. A region of space that contains no matter. Solid.
The equation you use is Ke = 1/2mv^2. when you plug in the numbers that are given you get Ke= 1/2(4)(2^2) which gives you a Kinetic Energy of 8
The velocity of the car after it accelerates for 25 seconds would be 820.2 ft/s or 250 m/s
