Answer:
Friction always acts in the direction opposing motion. This means if friction is present, it counteracts and cancels some of the force causing the motion (if the object is being accelerated).
Explanation:
Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other.
 
        
             
        
        
        
Answer:
The answer is Letter B The car travel at a constant veloc 
 
        
             
        
        
        
Answer:

Explanation:
Given that:
p = magnitude of charge on a proton = 
k = Boltzmann constant = 
r = distance between the two carbon nuclei = 1.00 nm = 
Since a carbon nucleus contains 6 protons.
So, charge on a carbon nucleus is 
We know that the electric potential energy between two charges q and Q separated by a distance r is given by: 

So, the potential energy between the two nuclei of carbon is as below:

Hence, the energy stored between two nuclei of carbon is  .
.
 
        
             
        
        
        
Answer: thermal energy
Explanation: Thermal energy is the conversion of kinetic energy