Absolute zero is not about numbers.  It's about temperature, and the 
motion of molecules in gases.  
You know that the temperature we feel with our skin is the result of the 
average speed of all the tiny molecules zipping around or vibrating in 
the solid, liquid, or gas.
The faster they're all moving, the warmer the substance feels to us.  
The slower they're all moving, the cooler the substance feels to us.
When molecules slow down to zero and lose all of their kinetic energy, 
that temperature is what we call 'absolute zero' ... if they're not moving 
at all, then they can't move any slower.
        
                    
             
        
        
        
Answer:
c = 1 / √(ε₀*μ₀)
Explanation:
The speed of the electromagnetic wave in free space is given in terms of the permeability and the permittivity of free space by
c = 1 / √(ε₀*μ₀)
where the permeability of free space (μ₀) is a physical constant used often in electromagnetism and ε₀ is the permittivity of free space (a physical constant).
 
        
             
        
        
        
 Answer:
D) 11 m/s
Explanation:
The problem asks us to calculate the velocity of the hot dog with respect to the observer stationary outside the train. This velocity is given by:

where
 is the velocity of the train (towards right)
 is the velocity of the train (towards right)
 is the velocity of the man (towards right)
 is the velocity of the man (towards right)
 is the velocity of the hot-dog (towards left, so we put a negative sign)
 is the velocity of the hot-dog (towards left, so we put a negative sign)
Substituting the numbers into the equation, we find

and the positive sign means the velocity is toward right.