The big bang is a theory of our universe and many others along with making our solar system. Meanwhile, in other universes have are solar system as well that is why we see stars at night because the sun and it's rays are so bright during the day it blocks them out.
Explanation:
In 1897, J.J. ... Thomson realized that the accepted model of an atom did not account for negatively or positively charged particles. Therefore, he proposed a model of the atom which he likened to plum pudding. The negative electrons represented the raisins in the pudding and the dough contained the positive charge.
This is true because somebody moved it and now it not reliable as evidence because it has be tampered with.
Answer: The electron number density (the number of electrons per unit volume) in the wire is 
.
Explanation:
Given: Current = 5.0 A
Area = 
Density = 2.7 
, Molar mass = 27 g
The electron density is calculated as follows.
where,
= density
M = molar mass
= Avogadro's number
Substitute the values into above formula as follows.
Thus, we can conclude that the electron number density (the number of electrons per unit volume) in the wire is .
To answer this question, we can use Newton's Second Law:
F = ma
We know that:
F = 20N
m = 0.25kg
So, we can plug what we know into the equation and isolate for the acceleration.
20 = 0.25a
a = 80m/s^2 which corresponds to answer A
