B. A film of food wrap. The cell membrane is the outermost layer that is protecting the cell
Answer:
Change in mechanical energy, 
Explanation:
It is given that,
Mass of the projectile, m = 12 kg
Speed of the projectile, v = 20 m/s
Maximum height, h = 18 m
Initially, the projectile have only kinetic energy. it is given by :


K = 2400 J
Finally, it have only potential energy. it is given by :
P = mgh

P =2116.8 J
The change in mechanical energy is given by :



So, the change in mechanical energy is 283.2 J. Hence, this is the required solution.
Answer:
golf all on grass covered hill in sunlight
Explanation:
someone pouring/spinning top has a lot of motion going on. a roller coaster has force acting on it which increases the motion.
Answer:
Knowing that these metals are infact good conductors of electricity we can infer that metals are able to hold and conduct certain temperatures. Another thing we can infer is that these good conductors can be used in connection to transferring energy or electricity.
Most likely gravity, because the gravity would pull it off course or wobble.