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2 years ago

What is the definition of nucleus?

Chemistry

2 answers:

Serjik [45]2 years ago

7 0

Answer:

The central and most important part of an object, movement, or group, forming the basis for its activity and growth.

Explanation:

hope this helps!

guajiro [1.7K]2 years ago

3 0

Answer:

atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom. definition for science.

Explanation:

important part of an object, movement, or group

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Violet light has a wavelength of 422 nm, how much energy is found in this photon of violet light?

pashok25 [27]

Answer:

3.025eV

Explanation:

Energy of a photon is given by

E=hν

Where h is the Planck's constant

And ν represents the frequency of the photon .

Now for violet light wavelength λ=410nm= 410x10^-9m

By using the formula ν=c/λ

where c represents speed of light I.e 3 x 10^8 m/s

Calculating energy of violet photon we have

E=hc/λ

h=6.626 x 10^-34 J.s

On inserting the value in the formula , we get

E= 4.848 x 10^-19 Joules

To convert it into electron volts we need to divide it by 1.602 x10^-19.

The final result what we have is E=3.026eV.

Note: the result calculated is according to the above value . result may vary according to the values taken .

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3 years ago

Acids and bases escape room And answers

lord [1]

Answer:

Explanation:

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3 years ago

Un camion que circula a 90 km hora frena uniformemente con una aceleracion de -5 metros por segundos al cuadrado

kozerog [31]

Answer:

no habla espanol

Explanation:

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2 years ago

The mass of a quantity of NiCl2

Gennadij [26K]

Not sure, is it :
B.
 1.9 3 1027 NiCl2
formula units

3 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