Answer:
# = 6.6 10¹⁵ electrons for r = 1 m
# = 6.6 10¹³ electrons for r= 1 cm
Explanation:
The electric force is given by Coulomb's law
F = k q₁ q₂ / r²
Where k is the Coulomb constant that is worth 8.99 10⁹ N m²/C², q are the charges and r the distance between them.
Let's apply this equation to our case. Initially the spheres are not attracted so the net charge in each of them is zero, removing electrons in one of them is a positive net charge of equal value to the negative charge removed. The specific answer of this exercise depends on the distance of the two spheres, by calculation we assume that it is 1 m
The charge of an electron is q₀ = -1.6 10⁻¹⁹ C, the total charge is
q = #_electron q₀
F = k # q₀ # q₀ / r²
#² = F r² / k q₀²
# = √ F r² / k q₀²
Let's calculate for r = 1 m
# = √ [1 10⁴ 1 / 8.99 10⁹ (1.6 10⁻¹⁹)²]
# = √ [43.45 10³⁰]
# = 6.6 10¹⁵ electrons for r = 1 m
If the distance is reduced to r = 1 cm = 1 10⁻² m
The number of electrons is reduced to
# = 6.6 10¹³ electrons
Answer:
T = 2390 degree C
Explanation:
Given data:
Resistance 12 ohm
Temperature 20 degree C
we know that linear relation between the resistance and temperature is given as
where is resistance at and = coefficient of resistivity
SOLVING FOR
degree C
WE KNOW
T = 2370 + 20
T = 2390 degree C
Explanation:
Hey there!!
Let's simply work with it.
Here,
load = 1200N
Effort = 200N
Load distance = 15cm
We have,
According to the principle of lever.
L×LD = E×ED.
1200×15 = 200× ED.
18000 = 200ED.
Therefore, Effort Distance = 90cm.
<em><u>Hope it helps</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>
Answer:
An electric chemical cell is not always needed to have a power circuit. But every other part is.
<span>the transverse wve that requires a medium to move is : sound waves
in order to travel, sound waves need to jumped on between one particle to another, no matter it's liquid, solid , and gases. Which explains why you wont hear a thing in outer space, simply because the sound waves got no particle to jumped into</span>