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3 years ago

7

i got the right answer for this question (pretty sure i guessed or just asked me teacher the answer?) but can someone explain ho

w i got that answer (like the process of figuring it out) thanks :)

1 answer:

Bingel [31]3 years ago

6 0

Well for you to get 980 Hz you divided 344 m/s with .35 m

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Haverá algum movimento de carga ao ligar duas esferas condutoras M e N de volumes diferentes, mas com a mesma cara?

aev [14]

it just depends on the situation some times yes sometimes no

8 0

3 years ago

what frequency of light must an electron in hydrogen absorb to jump from the n=2 state to the n=5 state? (a) 2.86 Hz (b) 4.08 Hz

Ostrovityanka [42]

Answer:

(c) 6.91x10^14 Hz

Explanation:

Find the level energy of n=2 and n=5, using the formula:

$E = -E_0/n^2$

where $E_0=13.6eV$

$E_2 =\frac{-13.6}{2^2}=-3.4eV$

$E_5 =\frac{-13.6}{5^2}=-0.544eV$

To jump from n=2 to n=5 the electron absorbs a photon with energy equal to $(-0.544) - (-3.4)=2.856eV$ , using the next formula to find specific wavelength $\lambda$ to that energy

$E = hc/\lambda$

Where $c$ is the speed of light ( $c=3 \times10^8m/s$ ) and $h$ is Planck's constant ( $h=4.14\times10^{-15}eVs$ ). Solve for $\lambda$ :

$E = hc/\lambda\\\lambda E = hc\\\lambda = \frac{hc}{E} \\\lambda = \frac{(4.14\times10^{-15})(3 \times10^8)}{2.856}=4.35\times10^{-7}m$

The frequency of this wavelength is calculated with this formula:

$f=\frac{c}{\lambda}$

$f=\frac{3\times10^8}{4.3487\times10^{-7}} =6.89\times10^{14}Hz\approx6.9\times10^{14}Hz$

8 0

4 years ago

Given a force of 75N and an acceleration of 3m/s2, what is the mass

Ivahew [28]

<h2>mass = 25kg</h2><h2>---------------------------------</h2>

force = 75N --- (<em>g</em><em>i</em><em>v</em><em>e</em><em>n</em><em>)</em>

acceleration = 3m/s² ---- (<em>g</em><em>i</em><em>v</em><em>e</em><em>n</em><em>)</em>

<h3>FORCE = mass × acceleration</h3>

75N = mass × 3m/s²

mass = 75÷3

<h3>mass = 25kg</h3><h2>-----------------------------</h2><h2>FOLLOW ME</h2>

6 0

3 years ago

Explain how the theory of the Sun’s dynamo results in an average 22-year solar activity cycle. Include the location and mechanis

horrorfan [7]

Answer:

Explanation:

Sun's dynamo means the process that produce Sun's magnetic field.

The mechanism inside a Sun acts like a generator that produces electric current and magnetic field.

Magnetic field with in the Sun are extended out and around. Magnetic field of lines get twisted due to rotation of Sun.

The material that flows inside the Sun plays an important role in Sun's dynamo. At surface the flow rate is about 20 m/s but as it moves towards equator, it becomes way too slow taking about 11 years of time.

Due to the this magnetic field, several sun spots are formed on the surface.

The number of sunspots keep on changing from minimum to maximum number resulting into change in the magnetic pole. In each cycle polarity get reversed hence the overall magnetic cycle has an interval of 22 years.

5 0

3 years ago

Comparing ultraviolet photons to radio photons, we can say that the ultraviolet photons have ______ energy, ______ frequency, an

guajiro [1.7K]

Answer:

Energy of ultra violet photons < Energy of radio waves

Wavelength of ultra violet photons > Wavelength of radio waves

Explanation:

The increasing order of the wavelength is given by

Gamma rays

x rays

Ultra violet rays

Visible radiations

Infrared rays

micro waves

Radio waves

So, ultra violet rays has larger wavelength than radio waves.

As we know that the energy is inversely proportional to the wavelength.

So, the energy of radio waves is more than the energy of ultra violet waves.

Energy of ultra violet photons < Energy of radio waves

Wavelength of ultra violet photons > Wavelength of radio waves

7 0

3 years ago