Answer:
m = 20 kg
Explanation:
Given that,
Force, F = 40 N
Acceleration of the object, a = 2 m/s²
We need to find the mass of the object. Let the mass be m.
We know that,
Net force, F = ma
So,

So, the mass of an object is equal to 20 kg.
Answer: The lower respiratory system moves oxygen into the blood; the circulatory system delivers blood to the body.
Explanation:
Yes it is. That is correct.