Answer:
The acceleration of the box across the floor is 7.0588 
Explanation:
Given:
Mass of the box = 2550 gram
net force acting on the box = 18 .0 N.
To Find:
The acceleration of the box across the floor = ?
Solution:
Newton's 2nd Law of Motion states that the acceleration of an object as produced by a net force is "directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
"
Newton's Second Law formula is
F = m a
Where:
F = the magnitude of the net force, in N
m = the mass of the object, in Kilogram
a = the acceleration of the object, in 
Now substituting the values, we get
18.0 = a (2.55) [since 2550 gram = 2.55 kg]

a = 7.0588 
The task of the respiratory system is the exchange of Oxygen and Carbon Dioxide within the body; however, the respiratory system alone has no mechanism for the transfer of oxygen from the lungs to the body for absorption and transfer of carbon dioxide from the body for expulsion. The cardiovascular system assists in this by moving oxygen-saturated blood from the lungs to different parts of the body and carbon dioxide rich blood from the body to the lungs.
Answer:
Mantenha sempre as mãos limpas
Siga dicas para tossir e espirrar sem contaminar.
Evite tocar em seu nariz, olhos e boca com as mãos sujas. ...
Evite tocar em seu nariz, olhos e boca. ...
Evite o contato com pessoas que estão doentes, pois podem estar contidas.
Answer:
3 because the muscle cells is produced