The answer is two (4 -3)
Zero is not a SF
Answer:
Option b
Explanation:
The formula of momentum is 
where p is the momentum , m is the mass in kg and v is the velocity in m/s, so
a) momentum is

b) momentum is

c) momentum is
here since the rock is sitting on top of a hill which means the object is stationary or in other words the object is at rest, which means if an object is at rest the velocity is 0m/s so momentum is zero of a stationary object because

d) momentum is

so the highest momentum is in part b which is 12 so option b is our answer.
a nonmetal with the amount of valence electrons that will complete atom
Answer: Option (B) is the correct answer.
Explanation:
A process in which transfer of heat occurring when one object touches another object is known as conduction.
For example, when a pan is heated and then an egg is placed over the pan. Then there will be transfer of heat from pan towards the egg.
As a result, the egg gets cooked because the egg was touching the pan.
Hence, we can conclude that it is conduction because the egg is touching the pan.
This is not easy. We don't know what CS, US, CR, or UR is, and we don't know the end result. Basically, we have no clue. This question has to get pitched into the "No given information" bucket.