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zaharov [31]
3 years ago
6

What do scientists think happens in the core to produce the Earth's magnetic field?

Chemistry
2 answers:
zubka84 [21]3 years ago
6 0

Answer:

A

Explanation:

The solid inner core of iron and nickel act as a large magnet.

Yakvenalex [24]3 years ago
4 0

Answer:

I think it would be

A) The liquid iron and nickel outer core's motion in relation to the metallic solid inner core becomes a geodynamo.

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At which of the following temperatures does all molecular motion stop
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What type of stress is caused by two plates sliding past one another?
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The rate constant of a reaction is 5.8 × 10−3 s−1 at 25°c, and the activation energy is 33.6 kj/mol. what is k at 75°c? enter yo
sergij07 [2.7K]

Answer:

k₂ = 4.06 x 10⁻² s⁻¹.

Explanation:

  • From Arrhenius law: <em>K = Ae(-Ea/RT)</em>

where, K is the rate constant of the reaction.

A is the Arrhenius factor.

Ea is the activation energy.

R is the general gas constant.

T is the temperature.

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<em>ln(k₂/k₁) = Ea/R [(T₂-T₁)/(T₁T₂)]</em>

k₁ = 5.8 × 10⁻³ s⁻¹, k₂ = ??? , Ea = 33600 J/mol, R = 8.314 J/mol.K, T₁ = 298.0 K, T₂ = 348.0 K.

  • ln(k₂/5.8 × 10⁻³ s⁻¹) = (33600 J/mol / 8.314 J/mol.K) [(348.0 K - 298.0 K) / (298.0 K x 348.0 K)] = (4041.37) (4.82 x 10⁻⁴) = 1.9479.
  • Taking exponential of both sides:

(k₂/5.8 × 10⁻³ s⁻¹) = 7.014.

∴ k₂ = 4.06 x 10⁻² s⁻¹.

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