Se apunta un rifle horizontalmente con mira a un blanco pequeño que está a 200m en el suelo. La velocidad inicial de la bala es
1 answer:
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Answer :
The least possible uncertainty in an electron's velocity is,
The percentage of the average speed is, 33 %
Explanation :
According to the Heisenberg's uncertainty principle,
...........(1)
where,
= uncertainty in position
= uncertainty in momentum
h = Planck's constant
And as we know that the momentum is the product of mass and velocity of an object.
or,
.......(2)
Equating 1 and 2, we get:
Given:
m = mass of electron =
h = Planck's constant =
radius of atom =
= diameter of atom =
Now put all the given values in the above formula, we get:
The minimum uncertainty in an electron's velocity is,
Now we have to calculate the percentage of the average speed.
Percentage of average speed =
Uncertainty in speed =
Average speed =
Percentage of average speed =
Percentage of average speed = 33.2 % ≈ 33 %
Thus, the percentage of the average speed is, 33 %
Answer:
The new voltage between the parallel plates of the capacitor is 18V, because for a constant electric field, doubling the space between the parallel capacitor plates, will also double the potential difference (voltage) between the plates.
Explanation:
ΔV = E*Δd
Where;
ΔV is the change in potential difference
Δd is the change in the distance between the parallel plates
E is the electric field potential.
Assuming a constant electric field;
when the spacing between the capacitor plates is doubled, d₂ = 2d₁
v₂ = (v₁*d₂)/(d₁)
v₂ = (v₁*2d₁)/(d₁)
v₂ = 2v₁
v₂ = 2(9) = 18 V
Therefore, for a constant electric field, doubling the space between the parallel capacitor plates, will also double the potential difference (voltage).