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3 years ago

Can you help me??????????????????????????)?

Physics

1 answer:

garik1379 [7]3 years ago

5 0

Answer:

Velocity is a change in displacement over change in time and uses the units m/s.

Both are rates of change and can be positive or negative.

Acceleration is a change in velocity over change in time and uses the units m/s².

Explanation:

Velocity is the change in displacement over change in time, this makes it a rate of change. It can be positive or negative because it is a vector quantity. It uses the units m/s because that is a displacement unit over a time unit.

Acceleration is the change in velocity over change in time, this makes it a rate of change. It can be positive or negative because it is also a vector quantity. It uses the units m/s² (m/s/s) because that is a velocity unit over a time unit.

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In a particular case of Compton scattering, a photon collides with a free electron and scatters backwards. The wavelength after

mafiozo [28]

Answer:

hence initial wavelength is $\lambda =4.86\times10^{-12}m$

Explanation:

shift in wavelength due to compton effect is given by

$\lambda ^{'}-\lambda =\frac{h}{m_{e}c}\times(1-cos\theta )$

λ' = the wavelength after scattering

λ= initial wave length

h= planks constant

m_{e}= electron rest mass

c= speed of light

θ= scattering angle = 180°

compton wavelength is

$\frac{h}{m_{e}c}= 2.43\times10^{-12}m$

$\lambda '-\lambda =2.43\times10^{-12}\times(1-cos\theta )$

$\lambda '-\lambda =2.43\times10^{-12}\times(1+1 )$ ( put cos 180°=-1)

also given λ'=2λ

putting values and solving we get

$\lambda =4.86\times10^{-12}m$

hence initial wavelength is $\lambda =4.86\times10^{-12}m$

4 0

4 years ago

How does gravity work in space? Please help!

vampirchik [111]

Answer:

gravityis an invisible force that pulls objects toward each other. So, the closer objects are to each other, the stronger their gravitational pull is. Earth's gravity comes from all its mass .

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2 years ago

Please help me. I don’t understand this.

guajiro [1.7K]

Answer:

Ft = 0[N]

Explanation:

To understand this problem we must perform an analysis of forces on the X axis, which coincides with the axis of forces of dogs.

In this way performing a sum of forces on the X-axis we will have (newton's third law):

$F_{rigth}-F_{left}+F_{total} =0\\\ 200-200+F_{total} =0\\F_{total}=0$

From this analysis we can see that the resulting or total force is equal to zero, since there is no movement.

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4 years ago

Explain different layers of atmosphere and the pressure in each layer. Draw diagram

Colt1911 [192]

Answer:

Our atmosphere has five different layers. They are:

1. Troposphere: This is the most important layer of the atmosphere with an average height of 13 km from the earth. It is in this layer that we find the air that we breathe. Almost all the weather phenomena such as rainfall, fog and hailstorm occur here.

2. Stratosphere: This layer extends up to a height of 50 km. It presents the most ideal condition for flying airplanes. It contains a layer of ozone gas which protects us from the harmful effect of the sun rays.

3. Mesosphere: This layer extends up to a height of 80 km. Meteorites bum up in this layer on entering from the space.

4. Thermosphere: In this layer, the temperature rises very rapidly with increasing height. The ionosphere is a part of this layer. It extends between 80-400 km. This layer helps in radio transmission. Radio waves transmitted from the earth the reflected back to the earth by this layer.

5. Exosphere: It is the uppermost layer where there is very thin air. Light gases such as helium and hydrogen float into space from here.

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3 years ago

Which wave, A or B, has lower energy? A, because it has a higher amplitude B, because it has a higher amplitude A, because it ha

frutty [35]

Energy of wave depends on its amplitude and it is given as

$E = \frac{1}{2} kA^2$

here k = constant

A = amplitude

so energy will increase or decrease depends on the amplitude of the wave

So here if we need to check which wave has lower energy then we need to compare the amplitude.

If the amplitude is less then energy must be less

So please check in the figure that which wave out of A and B has lesser amplitude to find out the wave of lesser energy

5 0

3 years ago

Read 2 more answers