Answer:
  W = 9.93 10² N
Explanation:
To solve this exercise we must use the concept of density
            ρ = m / V
the tabulated density of copper is rho = 8966 kg / m³
let's find the volume of the cylindrical tube
            V = A L
            V = π (R_ext  ² - R_int ²) L
let's calculate
           V = π (4² - 2²) 10⁻⁴  3
           V = 1.13 10⁻²  m³
          m = ρ V
         m = 8966 1.13 10⁻²
         m = 1.01 10² kg
the weight of the tube
         W = mg
          W = 1.01 10² 9.8
          W = 9.93 10² N
 
        
             
        
        
        
Answer:
from 
force =mass x acceleration 
mass = force/acceleration
m = f/a
m = 7.5/15
m=0.5kg
 
        
                    
             
        
        
        
Answer:
c.Law 
Explanation:
i think you must learn and write however good luck 
 
        
                    
             
        
        
        
Answer:
If the newly formed metamorphic rock continues to heat, it can eventually melt and become molten (magma). When the molten rock cools it forms an igneous rock. Metamorphic rocks can form from either sedimentary or igneous rocks.