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3 years ago

A compass needle points directly to your right. which way is east ?

Chemistry

1 answer:

inessss [21]3 years ago

4 0

Answer:

East would be behind you

Explanation:

The compass needle always points North unless there is a magnet near by that is messing it up

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romanna [79]

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6 0

3 years ago

A force interaction requires at least a(n)

Anastaziya [24]

C.) Action force unless it has potential/stored enerygy

8 0

3 years ago

Read 2 more answers

15A.4(a) What is the temperature of a two-level system of energy separation equivalent to 400 cm−1 when the population of the up

maksim [4K]

Answer:

T = 525K

Explanation:

The temperature of the two-level system can be calculated using the equation of Boltzmann distribution:

$\frac{N_{i}}{N} = e^{-\Delta E/kT}$ (1)

where Ni: is the number of particles in the state i, N: is the total number of particles, ΔE: is the energy separation between the two levels, k: is the Boltzmann constant, and T: is the temperature of the system

The energy between the two levels (ΔE) is:

$\Delta E = hck$

where h: is the Planck constant, c: is the speed of light and k: is the wavenumber

$\Delta E = 6.63\cdot 10^{-34} J.s \cdot 3\cdot 10^{8}m/s \cdot 4 \cdot 10^{4}m^{-1} = 7.96 \cdot 10^{-21}J$

Solving the equation (1) for T:

$T = \frac{-\Delta E}{k \cdot Ln(N_{i}/N)}$

With Ni = N/3 and k = 1.38x10⁻²³ J/K, the temperature of the two-level system is:

$T = \frac{-7.96 \cdot 10^{-21}J}{1.38 \cdot 10^{-23} J/K \cdot Ln(N/3N)} = 525K$

I hope it helps you!

3 0

3 years ago

True for a group of cells is called an organ

harina [27]

False. A group of cells is called a tissue.

6 0

3 years ago

The half-cell is a chamber in the voltaic cell where one half-cell is the site of the oxidation reaction and the other half-cell

SashulF [63]

Answer:

See below

Explanation:

The half-cell reduction potentials are

Ag⁺(aq) + e⁻ ⇌ Ag(s) E° = 0.7996 V

Co²⁺(aq) + 2e⁻ ⇌ Co(s) E° = -0.18 V

To create a spontaneous voltaic cell, we reverse the half-reaction with the more negative half-cell potential.

We get the cell reaction :

Anode: Co(s) ⇌ Co²⁺(aq) + 2e⁻

Cathode: 2Ag⁺(aq) + 2e⁻ ⇌ 2Ag(s)

Overall: Co(s) + 2Ag⁺ (aq) ⇌ Co²⁺(aq) + 2Ag(s)

3 0

4 years ago