:<span> </span><span>Under the assumption that a cell is made up of two concentric spheres you find the surface are of the inside sphere which will be your A.
You already have your separation and dielectric constant so just use the formula you stated towards the end of your question and you get 8.93x10^-11 Farads which is about 89pF</span>
Conductors have many free electrons
insulators have few free electrons
conductors are ideal for electrical wiring
Answer:
14 atoms
Explanation:
Number of atoms in Fe₂(CO₃)₃
An atom is the smallest indivisible particle that takes part in a chemical reaction.
In Fe₂(CO₃)₃; we have:
Elements Number of atoms
Fe 2
C 3
O 3(3) = 9
Total number of atoms = 2 + 3 + 9 = 14 atoms
Answer:
period of rotation is 9.9843 years
Explanation:
Given data
sides = 1.0×10^12 m
to find out
period of rotation
solution
first we use the gravititional formula i.e
F(g) = 2 F cos 30
here F = G × mass(sun)² / radius²
F = 6.67 × × (1.99× )² / (1× )²
so
F(g) = 2 × 6.67 × × (1.99× )² / (1× )² × (1.73/2)
F(g) = 4.57 × N
and
by the law of sines
r/sin30 = s/sin120
so r will be
r = 1.0×10^12 (0.5/.87)
r = 5.75 × m
we know that gravititional force = centripetal force
so here
centripetal force = mv² /r
centripetal force = 1.99× v² / 5.75 ×
so
4.57 × = mv² /r
4.57 × = 1.99× v² / 5.75 ×
v² = 4.57 × × 5.75 ×
and
v = 11480 m/sec
and we know period of rotation formula
t = d /v
t = 2 r /v
t = 2 × × 5.75 × [tex]10^{11} / 11480
t = 314 × [tex]10^{5} / 31536000 year
t = 9.9843 year
so period of rotation is 9.9843 years