0.013888888888889
I believe this is the answer
The formula for density is ρ=m/v where ρ is density, m is mass and v is volume.
the resistance that one surface or object encounters when moving over another.
"a lubrication system that reduces friction"
synonyms: abrasion, abrading, rubbing, chafing, grating, rasping, scraping, excoriation, grinding, gnawing, eating away, wearing away/down; More
the action of one surface or object rubbing against another.
"the friction of braking"
Friction is an important force because it is a force that affects motion. This force exerted by the surface of an object when another object moves against it is the result of molecular attractions between the objects' surfaces, and works in the direction opposite to the direction of the motion.
The change in internal energy of the system is given by the first law of thermodynamics:
where
Q is the heat added to the system
W is the work done by the system
In this problem,
(with a negative sign because the heat is released by the system (not absorbed)), and the work is
, with a positive sign since it is performed by the system. Therefore, the variation of internal energy of the system is
So, the internal energy of the system has decreased.
Yes, of course! by it's definition the potential energy is an energy that particle have in order to obtain kinetic energy. Or simply an energy to make some movement.