Structure of Alveoli provides more surface area for lungs, to exchange the gases & for process of respiration
Answer:
protons
Explanation:
The proton identifies an atom as that of a particular element. The atomic number is equal to the number of protons in the nucleus of an atom.
The force on an object use Socratic glad to help ..
Answer:
Explanation:
According to Newton's laws of gravitation force of attraction is given by
F = GMm/R²
G = 6.67 X 10⁻¹¹
,M = 2.5 Kg ,
m = 2.5 Kg ,
R = .14 m
=
F = 6.67 X 10⁻¹¹ X 2.5 X 2.5 / 0.14²
= 2126.9 X 10 ⁻¹¹ N.
