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3 years ago

Atmospheric pressure decreases with increment in height. give reason

Physics

2 answers:

natulia [17]3 years ago

8 0

Answer:

this is because as the altitude increases the number of air molecules decreases

jekas [21]3 years ago

7 0

Answer:

pressure=height × density×acc due to gravity

pressire is directly proportional to height hence it decreses with decrease in height

here air column height is measured upside down so decreases witn increment

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An electromagnetic wave with frequency 65.0Hz travels in an insulating magnetic material that has dielectric constant 3.64 and r

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Answer:

The wavelength of the wave is $1.06\times10^6 m$

Explanation:

Lets calculate

We know an electromagnetic wave is propagating through an insulating magnetic material of dielectric constant K and relative permeability $K_m$ ,then the speed of the wave in this dielectric medium is $\nu$ is less than the speed of the light c and is given by a relation

$\nu=\frac{c}{\sqrt{KK_m} }$ --------- 1

In case the electromagnetic wave propagating through the insulating magnetic material , the amplitudes of electric and magnetic fields are related as -

$E_m_a_x= \nu B_m_a_x$

The magnitude of the 'time averaged value' of the pointing vector is called the intensity of the wave and is given by a relation

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now , we will find the speed of the propagation of an electromagnetic wave by using equation 1

$\nu=\frac{c}{\sqrt{KK_m} }$

Putting the values ,

= $\nu= \frac{3.00\times10^8}{\sqrt{(3.64)(5.18)} }$

= $0.6908\times10^8m/s$

= $6.91\times10^7m/s$

Now , using this above solution , we will find the wavelength of the wave -

$\lambda=\frac{\nu}{f}$

Putting the values from above equations -

$\frac{6.91\times10^7m/s}{65.0Hz}$

$\lambda= 1.06\times10^6 m$

Hence , the answer is $\lambda= 1.06\times10^6 m$

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Atmospheric pressure decreases with increment in height. give reason​

Atmospheric pressure decreases with increment in height. give reason