In one type of mass spectrometer, ions having the same velocity move through a uniform magnetic field. The spectrometer is being
1 answer:
Answer:
Explanation:
(a) For this problem we can use the expression
where B is the magnetic field, r is the radius of the curve described by the ion, m is the mass and q is the electric charge.
In this case, both isotopes have the same velocity, and we can assume that both isotopes has been ionized to have the same charge. Being r and r' the radius of the curve for 12C ion and 14C ion respectively, we have
Hence, 2*24.67cm=49.35cm is the diameter of the orbit for 14C.
(b) we can calculate ω by using
By dividing these expressions we have
The isotope 12C has 1.16 more angular frecuency than 14C
I hope this is useful for you
regards
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- When an object is stationary all the forces acting on the object comes in equilibrium with each other.
- The forces acting on a stationary object are:
- Normal force (upwards)
- Gravitational force (downwards)
- push force
- friction force
- All these forces cancel out each other.
Answer:
a) E = k Ze (1- r³ / R³) 1/r², b) E=0, c) E = -6.62 10¹⁰ N / C
Explanation:
a) For this we can use the law of Gauus
Ф = E- dA = / ε₀
where we take a sphere as a Gaussian surface, so that the electric field lines and the radii of the sphere are parallel, consequently the dot product is reduced to the algebraic product
E A =q_{int} / ε₀
the area of a sphere
A = 4π r²
E 4π r² = q_{int} / ε₀
E = 1 / 4πε₀ q_{int} / r²
k = 1 /4π ε₀
E = k q_{int} / r² (1)
let's analyze the charge inside the gaussian sphere,
let's use the concept of density for electrons, since they indicate that the charge is evenly distributed
ρ = Q / V
where the volume of the sphere is
V = 4/3 πr³
Qe = ρ V
Qe = ρ 4 / 3π r³
the density of the electrons is
ρ = Ze 3 / (4π R³)
where R is the atomic radius
we substitute
Qe = Ze r³/ R³
for protons they are in a very small space, the atomic nucleus, so we can superno that they are a point charge.
The net charge inside our Gaussian surface, the charge of the protoens plus the charge of the electroens (Qe)
q_{int} = q_proton + Q_electron
q_{int} = + Ze - Qe
q_{int} = + Ze - Ze r³ / R³
q_{int} = Ze (1- r³ / R³)
we substitute in equation 1
E = k Ze (1- r³ / R³) 1/r²
b) on the surface of the atom r = R
therefore the electric field is zero
E = 0
c) Calculate the electric field for the Uranium for
r = R / 2 = 0.10 10⁻⁹ / 2 = 0.05 10⁻⁹ = 5 10⁻¹¹ m
E = 8.99 10⁹ 92 1.6 10⁻¹⁹ (1-1/2)³ 1/ (5 10⁻¹¹)²
E = -6.62 10¹⁰ N / C