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dalvyx [7]
3 years ago
13

If the electron is initially in the ground level, E1=0.625E[infinity]E1=0.625E[infinity], and absorbs a photon, what maximum wav

elength can the photon have and still liberate the electron from the well?
Physics
1 answer:
tekilochka [14]3 years ago
4 0

Answer:

 λ = 3.1824 10-25 m

Explanation:

To release the electron from the power well the absorbed photon electro must be greater than or equal to the energy of the electron in the power well

           

The photon energy is E_photon = 0.625 J

The speed of light is

       c = λ f

         

Let's use Planck's equation

        E = h f

             

We substitute

       E = h c / λ

        λ = h c / E

        λ = 6.63 10-34 3 108 / 0.625

         λ = 3.1824 10-25 m

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A car initially traveling at 27.2 m/s undergoes a constant negative acceleration of magnitude 1.90 m/s2 after its brakes are app
zubka84 [21]

Answer:

Therefore, the revolutions that each tire makes is:

\Delta \theta=22\: rev

Explanation:

We can use the following equation:

\omega_{f}^{2}=\omega_{i}^{2}-2\alpha \Delta \theta (1)

The angular acceleration is:

a_{tan}=\alpha R

\alpha=\frac{1.9}{0.325}

\alpha=5.85\: rad/s^{2}

and the initial angular velocity is:

\omega_{i}=\frac{v}{R}

\omega_{i}=\frac{27.2}{0.325}

\omega_{i}=83.69\: rad/s

Now, using equation (1) we can find the revolutions of the tire.

0=83.69^{2}-2*25.85 \Delta \theta

\Delta \theta=135.47\: rad

Therefore, the revolutions that each tire makes is:

\Delta \theta=22\: rev

I hope it helps you!

6 0
3 years ago
Please answer me!!! asappp​
Anastasy [175]

Answer:

omg this is hard

Explanation:

Yes it is lol

5 0
3 years ago
What is the definition of input force?
andrezito [222]

Answer:

The input force (effort) is the amount of effort used to push down on a rod, or pull on a rope in order to move the weight. In this example, the force the little guy is using to pull the elephant is the input force.

Explanation:

5 0
3 years ago
Read 2 more answers
4. How will you find the volume of an irregularly shaped object that would dissolve<br>in water?​
Dimas [21]
Um you should putting it in a object that it can fill then go from there
4 0
3 years ago
Read 2 more answers
Given the information below, estimate the total distance travelled during these 6 seconds using a left endpoint approximation. t
Nutka1998 [239]

Answer:

184 feets

Explanation:

Given the data:

time (sec) __ velocity (ft/sec)

0 __________30

1 __________ 54

2 __________56

3 __________34

4 __________ 8

5 __________ 2

6 __________22

Using left end approximation:

(0,1) ___ f(0) = 30

(1,2) ___ f(1) = 54

(2,3) ___f(2) = 56

(3,4) ___f(3) = 34

(4,5) ___f(4) = 8

(5,6) __ f(5) = 2

Hence, the Total distance traveled during the 6 second interval is:

Change ; dT = 1

1 * (30 + 54 + 56 + 34 + 8 + 2) = 184

4 0
3 years ago
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