Answer:
Explanation:
There are different theories and evidence about the big bang, in this case, we're going to see three evidence.
The galaxies are moving from us, this means space is expanded, this in consequence Big Bang's explosion.
The cosmic microwave background radiation is related to the early warmth of the universe.
The observed abundance of hydrogen, helium, deuterium, lithium, these are checked from the spectra of the oldest stars.
 
        
             
        
        
        
Answer:
 a = 0.55 m / s²
Explanation:
The centripetal acceleration is given by the relation
          a = v² / r
angular and linear velocities are related
          v = w r
we substitute
           a = w² r
In the exercise they indicate the angular velocity w = 1 rev/min, let's reduce to the SI system
           w = 1 rev / min (2pi rad / 1rev) (1min / 60s) = 0.105 rad/ s
let's calculate
           a = 0.105² 50.0
           a = 0.55 m / s²
 
        
             
        
        
        
It is a chemical change and a physical change