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4 years ago

Which statement correctly describes a difference between the mesosphere and the stratosphere?

Physics

1 answer:

Evgesh-ka [11]4 years ago

6 0

Answer:

F. The mesosphere contains fewer oxygen molecules than the stratosphere.

Explanation:

The layers of the atmosphere are divided into:

1. Troposphere

2. Stratosphere

3. Mesosphere

4. Thermosphere

5. Exosphere

The troposphere extends from the earth surface to about 10km upwards. This is the region of the greatest atmospheric pressure and where all weather conditions arises. In the troposphere, the higher one goes the cooler it becomes.

The stratosphere lies on the troposphere and it is about 50km from the top of the troposphere. The stratosphere is the region where ozone, an oxygen molecule, forms a layer. The higher you go in the stratosphere, the warmer it becomes.

The mesosphere is about 90km thick and it has less gas density. It extends from the top of the stratosphere upwards. The gases here are sparse and atmospheric pressure is lesser than that of the surface. Here, the higher you go in the mesosphere, the cooler it becomes.

Only option F is correct: the mesosphere contains fewer oxygen molecules than the stratosphere.

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Which of the following best explains why electromagnetic waves of all wavelengths have the same speed in a vacuum?

Blababa [14]

All electromagnetic waves have the same manner of propagation; alternating electric and magnetic fields that's why electromagnetic waves of all wavelengths have the same speed in a vacuum

An altering magnetic field will cause an altering electric field and vice versa. Electromagnetic waves are created from these shifting fields. In contrast to mechanical waves, electromagnetic waves can travel without a medium. The oscillations between an electric field and a magnetic field produce waves known as electromagnetic waves or EM waves.

In other words, magnetic and electric fields oscillate to form electromagnetic (EM) waves. Almost the majority of the energy that sustains life on our planet comes from electromagnetic waves that flow from the sun to Earth through space. Technology is a necessity for many additional electromagnetic wave sources. Examples include X-rays, radio waves, and microwaves.

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8 0

2 years ago

A sphere of radius r = 5cm carries a uniform volume charge density rho = 400 nC/m^3. Q. What is the total charge Q of the sphere

Tanzania [10]

Answer:

The total charge Q of the sphere is $2.094\times10^{-10}\ C$ .

Explanation:

Given that,

Radius = 5 cm

Charge density $J= 400\ nC/m^3$

We need to calculate the total charge Q of the sphere

Using formula of charge

$q=\rho V$

Where, $\rho$ = charge density

V = volume

Put the value into the formula

$q=\rho\times(\dfrac{4}{3}\pi r^3)$

Put the value into the formula

$q=\dfrac{4}{3}\times\pi\times400\times10^{-9}\times(5\times10^{-2})^3$

$q=2.094\times10^{-10}\ C$

Hence, The total charge Q of the sphere is $2.094\times10^{-10}\ C$ .

6 0

3 years ago

From whom should a departing VFR aircraft request radar traffic information during ground operations?

zavuch27 [327]

Answer:From whom should a departing VFR aircraft request radar traffic information during ground operations? ... Answer: Sequencing to the primary Class C airport, traffic advisories, conflict resolution, and safety alerts.

Explanation:

6 0

3 years ago

Electric power is to be generated by installing a hydraulic turbine-generator at a site 120 m below the free surface of a large

iogann1982 [59]

Answer:

P = 2234400 Watt

Explanation:

Power generation is given as rate of work done

Here the turbine generator is located at 120 m below the free surface

So here rate of work done is given as rate of potential energy

$Power = \frac{dw}{dt}$

$Power = \frac{mgh}{t}$

so we have

$Power = (\frac{dm}{dt})gh$

now we have

$Power = 1900(9.8)(120) = 2234400 Watt$

so the power generation potential will be 2234400 Watt

8 0

3 years ago

A man has a weight of 100 Newtons. How much work is done if he climbs 4meters up a ladder?

Aliun [14]

Answer:

400 J

Explanation:

Work is done when a force that is applied to an object moves that object.

The work is calculated by multiplying the force by the amount of movement of an object

W = F * d

here the man has to work against the gravitational field. (against his weight)

F =100 N

Work done = F * d

= 100 * 4

= 400 J

7 0

4 years ago