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3 years ago

50 POINTS

Geography

1 answer:

fomenos3 years ago

6 0

Well there are Primary waves, Secondary waves,and Surface waves

Primary waves:

These waves can travel through fluids and solids and are longitudinal - this means they transfer their energy through compression, like a slinky forming compressed areas when you push one end (sound is also an example of a longitudinal wave).

This also means that they transfer energy parallel to the direction of the wave, so if a wave is travelling north to south, the energy will be transferred in this direction.

P-waves are the fastest of the three seismic wave

Secondary waves:

S-waves cannot travel through air or water, only through solids, but they have a larger amplitude (this is the height of a wave, measured from the highest point to the middle line) so are more destructive in the case of an earthquake.

They are transverse waves, meaning they transfer energy perpendicular (at right angles) to the direction of the wave - like a rope being shaken up and down (this is like the classic up and down wave associated with light).

S-waves are slower than P-waves.

Surface waves:

The final type of seismic wave occurs along the boundary between two different substances (e.g. rock and air). They can be either longitudinal (Rayleigh) or transverse (Love and Rayleigh).

These waves travel slower than both S and P waves, but have a higher amplitude and so can be the most destructive of all the seismic waves.

All three types of seismic wave are generated in an earthquake, and we can monitor them to find out about the nature of one. For example, by measuring the difference in arrival at a monitor between the fast P waves and slower S waves to find the location of an earthquake's focus.

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1. Which type of clouds can you always expect to signal fair weather: cirrus, stratus, or cumulus?

Cerrena [4.2K]

The correct answers are as follows:
1. The type of cloud that usually signify fair weather is CUMULUS.
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2. The type of cloud that usually brings precipitation is NIMBUS. The Nimbus cloud usually form dark colored, wet looking layers, that are typically associated with precipitation. The precipitation can be light or moderate. The cloud can also result in continuous rain or snow.

3. The arrangement of the clouds from the highest to lowest are as follows: CIRRUS, ALTOCUMULUS, STRATUS AND FOG.
Cirrus is an high level cloud, altocumulus is a middle level cloud, stratus is a low level cloud and the fog is the closest to the earth surface.

4.The type of cloud that occasionally produce precipitation is STRATUS.
The stratus cloud is usually an even gray colored cloud, it normally covers the entire sky. This type of cloud can sometime brings about precipitation or light drizzle.

5. My show was not cancelled, it was renewed.
Prime Time Television usually carries out a review of their shows every season and most of the their shows usually get dropped off for a new ones during a new season. Approximately 80% of Prime Time shows are usually removed every season while only about 20% is renewed. My favorite show is part of the renewed ones for this season.

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3 years ago

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1. At the location of any star, west is defined as the direction of the apparent motion, and east is the opposite direction. Is

Andre45 [30]

Answer and Explanation:

1. In order to determine the direction whether west is toward left or right, let us suppose that we are facing towards the south direction.

Thus the apparent motion's direction at east is leftwards and hence west is rightwards.

2. The vast majority of the stars seem to move in a similar way at both the north and south poles but not all the stars.

Since stars in northern half of the globe seem to turn clockwise however some are not seen because of going under the skyline and which is valid for southern side of the equator too.

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3 years ago

What is the role of sunlight in the Ecosystem?

netineya [11]

Answer:

The two most important climatic factors for ecosystems are sunlight and water. Sunlight is necessary for plants to grow, and to provide energy to warm the earth's atmosphere. Light intensity controls plant growth. Light duration affects plant flowering and animal/insect habits.

Explanation:

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3 years ago

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Imagine that you have obtained spectra for several galaxies and have measured the observed wavelength of a hydrogen emission lin

Lerok [7]

Answer:

A. z (galaxy 1) = -0.00515, z (galaxy 2) = -0.01707, z (galaxy 3) = -0.04008

B. v (galaxy 1) = -0.00517c, v (galaxy 2) = -0.01707c, v (galaxy 3) = -0.0401c

C. d (galaxy 1) = -21 Mpc,d (galaxy 2) = -69.4 Mpc, d (galaxy 3) = -163 Mpc

Explanation:

We begin by listing out the parameters we were given:

λ (obsv) = 656.3 nm, λ (emit 1) = 659.7 nm, λ (emit 2) = 667.7 nm,

λ (emit 3) = 683.7 nm

A) Using the Redshift formula, we have:

z = [λ (obsv) - λ (emit)] ÷ λ (emit)

For galaxy 1:

z = [λ (obsv) - λ (emit 1)] ÷ λ (emit 1)

z = (656.3 - 659.7) ÷ 659.7 = -0.00515

z = -0.00515

For galaxy 2:

z = [λ (obsv) - λ (emit 2)] ÷ λ (emit 2)

z = (656.3 - 667.7) ÷ 667.7 = -0.01707

z = -0.01707

For galaxy 3:

z = [λ (obsv) - λ (emit 3)] ÷ λ (emit 3)

z = (656.3 - 683.7) ÷ 683.7 = -0.04008

z = -0.04008

B) Using the Doppler formula, we have:

(Δλ ÷ λ) = v ÷ c

v = c * (Δλ ÷ λ)

but, z = (Δλ ÷ λ)

⇒ v = c * z

speed of light (c) = 3 x $10^{8}$ m/s

For galaxy 1:

v = c * z

Substitute z into the equation calculated from A) above

v = 3 x $10^{8}$ * (-0.00515)

v = -1.55 x $10^{6}$ m/s

v = -0.00517c

For galaxy 2:

v = c * z

Substitute z into the equation calculated from A) above

v = 3 x $10^{8}$ * (-0.01707)

v = -5.12 x $10^{6}$ m/s

v = -0.01707c

For galaxy 3:

v = c * z

Substitute z into the equation calculated from A) above

v = 3 x $10^{8}$ * (-0.04008)

v = -12.03 x $10^{6}$ m/s

v = -0.0401c

N.B: the negative value of velocity connotes that the galaxies are moving away from us (not towards us)

C) Using Hubbleʹs law, we have:

v = H · d

where:

v = velocity of a galaxy (km/s), d = distance (Mpc),

H = Hubble's constant (km/s/Mpc) = 73.8 km/sec

d = v ÷ H

We use the velocities calculated in B) above

For galaxy 1:

v = -1.55 x $10^{3}$ km/s

d = -1.55 x $10^{3}$ ÷ 73.8

d = -21 Mpc

For galaxy 2:

v = -5.12 x $10^{3}$ km/s

d = -5.12 x $10^{3}$ ÷ 73.8

d = -69.4 Mpc

For galaxy 3:

v = -12.03 x $10^{3}$ km/s

d = -12.03 x $10^{3}$ ÷ 73.8

d = -163 Mpc

N.B: distance cannot be a negative value

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3 years ago

Name a country which has very high percentage of land under pasture

Zarrin [17]

Answer:

India

Explanation:

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3 years ago

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