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4 years ago

What is 100+10000000000000000000

Physics

2 answers:

Kruka [31]4 years ago

6 0

Answer:

200000000000000000000000

Explanation:

zhenek [66]4 years ago

3 0

Answer:

10000000000000000100

Explanation:

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A line in the paschen series of hydrogen has a wavelength of 1880 nm. From what state did the electron originate?

NARA [144]

Answer:

$n=4$

Explanation:

Paschen series of hydrogen, is the series of transitions resulting from the hydrogen atom when electron jumps from a state of $n\geq 4$ to $n_f=3$ .

Emission lines for hydrogen are given by:

$\frac{1}{\lambda}=R_H(\frac{1}{n_f^2}-\frac{1}{n^2})$

$\lambda$ is the wavelength of the line emitted, $R_H$ is the Rydberg constant for hydrogen, $n_f$ is the final energy state of the electron and $n$ is the energy state where the electron transition originated.

We have $\lambda=1880nm=1880*10^{-9}m$ and $n_f=3$ . Solving for n:

$\frac{1}{\lambda R_H}=\frac{1}{n_f^2}-\frac{1}{n^2}\\\frac{1}{n^2}=\frac{1}{n_f^2}-\frac{1}{\lambda R_H}\\n^2=\frac{1}{\frac{1}{n_f^2}-\frac{1}{\lambda R_H}}\\n^2=\frac{1}{\frac{1}{3^2}-\frac{1}{1880*10^{-9}m(1.09737*10^7m^{-1})}}\\n^2=15.96\\n=4$

6 0

4 years ago

If an object has a kinetic energy of 30 j and mass of 34kg how fast is the object moving ?

Murrr4er [49]

Ek = (m*V^2) / 2 where m is mass and V is speed, then we can take this equation and manipulate it a little to isolate the speed.

Ek = mv^2 / 2 — multiply both sides by 2

2Ek = mv^2 — divide both sides by m

2Ek / m = V^2 — switch sides

V^2 = 2Ek / m — plug in values

V^2 = 2*30J / 34kg

V^2 = 60J/34kg

V^2 = 1.76 m/s — sqrt of both sides

V = sqrt(1.76)

V = 1.32m/s (roughly)

5 0

3 years ago

If a wave is traveling at 200 m/s and it’s wavelength is 0.5 meters , what is the frequency of the wave

Mrrafil [7]

Answer:

400 Hz

Explanation:

The frequency of a sound wave is found by the velocity/wavelength. Therefore, f = v/wavelength = (200 m/s)/(0.5 m) = 400 Hz

I hope this helps! :)

5 0

3 years ago

A 2 C charge and a 4 C charge attract each other with 10 N of force How much will a 2C charge and a 8 C charge attract each othe

densk [106]

Answer: 20N

Explanation:

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2 years ago

) Force F = − + ( 8.00 N i 6.00 N j ) ( ) acts on a particle with position vector r = + (3.00 m i 4.00 m j ) ( ) . What are (a)

natali 33 [55]

To develop this problem it is necessary to apply the concepts related to the Cross Product of two vectors as well as to obtain the angle through the magnitude of the angles.

The vector product between the Force and the radius allows us to obtain the torque, in this way,

$\tau = \vec{F} \times \vec{r}$