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Mila [183]
3 years ago
13

When the medium is uniform, how do light waves pass through it?

Physics
1 answer:
LekaFEV [45]3 years ago
8 0

The correct answer is, A) Straight line motion

I took the quiz

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Centripetal force.
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Please help ASAP- A book has a mass of 5 kg, a baby has a mass of 5 kg. Which one weighs more?
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Answer:

Same mass

Explanation:

5kg and 5kg are the same that's the explanation

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A distant galaxy emits light that has a wavelength of 434.1 nm. On earth, the wavelength of this light is measured to be 438.6 n
maksim [4K]

Answer:

A) receding from the earth

B) 3.078x10^6m/s

Explanation:

  • A) receding from the earth

The wavelength went from 434.1nm to 438.6nm, there was an increase in wavelength (also knowecn as redshift due to the doppler efft), this increase is due to the fact that the source that emits the radiation (the distant galaxy) is moving away and therefore the light waves it emits are "stretched", causing us to see a wavelength greater than the original.

  • B) 3.078x10^6m/s

to calculate the relative speed we use the following formula:

v_{rel}=c(1-\frac{\lambda_{1}}{\lambda_{2}} )

where c is the speed of light: c=3x10^8m/s

\lambda_{1} is the wavelength emited by the source, and

\lambda_{2} is the wavelength measured on earth.

we substitute all the values and do the calculations:

v_{rel}=(3x10^8m/s)(1-\frac{434.1nm}{438.6nm} )\\\\v_{rel}=(3x10^8m/s)(1-0.98974)\\\\v_{rel}=(3x10^8m/s)(0.01026)\\\\v_{rel}=3.078x10^6m/s

the relative speed is: 3.078x10^6m/s

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3 years ago
How would you calculate the acceleration of an object?
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The right answer is c. You are going to divide by the velocity or speed by time.
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2 years ago
What is a type of material that tries to prevent the flow of thermal energy?
Citrus2011 [14]
A type of material that tries to prevent the flow of thermal energy is called an insulator.
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