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GaryK [48]
2 years ago
9

Find the wavelength of light given off by a hydrogen atom when its electron drops from the n = 4 to n = 1 energy level

Physics
1 answer:
4vir4ik [10]2 years ago
4 0

Answer: 1.55 x 10 -19J on top

Explanation:

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A woman walked 115 m. As she did so, her speed increased from 4.20 m/s to 5.00 m/s. How long did it take her to walk this distan
ASHA 777 [7]

Answer:

25 seconds

Explanation:

Assuming the woman is accelerating at a constant rate of a \;\;m/s^2 from the initial velocity, u=4.20 m/s, to the final velocity, v=5.00 m/s.

Let she takes t seconds to cover the distance, s=115 m.

As acceleration, a=\frac{v-u}{t}=\frac{5-4.2}{t}

\Rightarrow at=0.8\cdots(i)

Now, from the equation of motion

s=ut+\frac 12 at^2

\Rightarrow s=ut+\frac 12 at(t)

\Rightarrow 115=4.2t+\frac 12 \times 0.8 t [ from equation (i)]

\Rightarrow 115=(4.2+0.4)t

\Rightarrow t= 115/4.6 = 25 seconds.

Hence, she takes 25 seconds to walk the distance.

5 0
3 years ago
1. Two forces F~ 1 and F~ 2 are acting on a block of mass m=1.5 kg. The magnitude of force F~ 1 is 12N and it makes an angle of
VLD [36.1K]

Answer:

Normal force=7.48 N

Explanation:

N+F~1 sinθ-mg=0

=>N=1.5*9.8-12 sin37◦

=>N=14.7-7.22=7.48 N

6 0
2 years ago
What type on msd causes inflammation of the tendons that correct bones to muscles
svp [43]

I believe it would be Tendonitis

8 0
3 years ago
What is an example of an electromagnetic wave? Select all that apply. *
Afina-wow [57]

Answer:

A gamma ray, light from a lamp, and a microwave are examples of electromagnetic radiation.

Explanation:

Gamma radiation, visible light (light from a lamp), and microwaves are all apart of the electromagnetic spectrum.

8 0
3 years ago
Read 2 more answers
A bus travels from el Paso, texas, to chihuahua, mexico, in 5 hr with an average velocity if 75km/hr to the south. How far is Ch
katen-ka-za [31]

375km

Explanation:

Given parameters:

Time of travel = 5hr

Average velocity  = 75km/hr south

Unknown:

Displacement between Chihuahua and El paso = ?

Solution:

Velocity is the rate of change of displacement of a body with time. It is a vector quantity that has both magnitude and direction;

       Velocity = \frac{displacement}{time}

Since the unknown is displacement;

 displacement = velocity x time

 

 input the values;

   displacement = 75km/hr x 5hr = 375km

learn more:

Velocity brainly.com/question/10883914

#learnwithBrainly

4 0
3 years ago
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