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Anna35 [415]
3 years ago
13

One of the strongest emission lines observed from distant galaxies comes from hydrogen and has a wavelength of 122 nm (in the ul

traviolet region). (a) How fast must a galaxy be moving away from us in order for that line to be observed in the visible region at 366 nm
Physics
1 answer:
NeTakaya3 years ago
7 0

Answer:

v=2.4*10^8m/s

Explanation:

From the question we are told that

Wavelength of emission \lambda=122nm

Observation distance d=366nm

Generally the s equation is given as

f'=f\sqrt{\frac{(1-\frac{v}{c} )}{1+\frac{v}{c} }

where

F is inversely proportional to T

d=\lambda\sqrt{\frac{(1-\frac{v}{c} )}{1+\frac{v}{c} }

\frac{v}{c} =\frac{(1-\frac{\lambda}{d})}{(1+\frac{\lambda}{d}}

\frac{v}{c}=\frac{1-(\frac{122}{366} )^2}{1+(\frac{122}{366})^2}

\frac{v}{c}=\frac{0.8888888889}{1.11111111}

\frac{v}{c}=0.80

v=0.80*3*10^6

v=2.4*10^8m/s

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The force exerted by one plate for two parallel plates arrangement is F = QE/2.

<h3>Force one plate exerts on the other</h3>

The force exerted by one plate for two parallel plates arrangement is given as follows;

F = QE/2

where;

  • Q is the charge on one plates
  • E is the electric field due to the charge
  • F is force exerted by one plate

Thus, the force exerted by one plate for two parallel plates arrangement is F = QE/2.

Learn more about force between parallel plates here: brainly.com/question/13590045

5 0
2 years ago
In some cases, neither of the two equations in the system will contain a variable with a coefficient of 1, so we must take a fur
levacccp [35]

Answer:

Explanation:

Given the simultaneous equation,

3C+4D=5  .............. 1

2C+5D=2 ............... 2

Solving for the value of C and D using substitution method.

From equation 1;

3C = 5-4D

Divide both sides by 3

3C/3 =  (5-4D)/3

C = (5-4D)/3 .... 3

From equation 2:

2C+5D=2

5D = 2-2C

Divide both sides by 5;

5D/5 = 2-2C/5

D = (2-2C)/5 ..... 4

Substitute equation 4 into 3;

C = 5-4{(2-2C)/5}/3

C = [5 - (8-8C/5)]/3

C = [25-(8-8C)/5]/3

C = (17+8C)/15

15C = 17+8C

15C-8C = 17

7C = 17

C = 17/7

Substitute C = 17/7 into equation 4 to get the value of D

D = (2-2(17/7))/5

D = (2-34/7)/5

D = 14-34/35

D = -20/35

D = -4/7

<em>Hence the value of C = 17/7, D = -4/7</em>

6 0
4 years ago
Calculate the percent error of the distance to the moon.
Bess [88]

Answer:

Explanation:

Difference in the measurement by shuttle crew  Δ d = 238857 - 226316 miles

= 12541 miles

Actual measurement =  238857 miles

percentage error

= (12541 / 238857 ) x 100

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3 years ago
Which diagram is the best model for a solid?<br> Substance A<br> Substance B<br> О Substance C
mina [271]

Answer:

This link was diagram

Explanation:

https://doubtnut.app.link/FnsNC80Dccb

7 0
3 years ago
Ned the skydiver weighs 600 N and is falling at terminal speed. That is, he has sped up until air resistance has built up so muc
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Answer:

The work done is 120000 J.

Explanation:

Given that,

Weight = 600 N

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Using formula of work done

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Put the value into the formula

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Hence, The work done is 120000 J.

7 0
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