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3 years ago

Which of the following phenomena provides evidence of electric fields in the atmosphere?

2 answers:

7 0

The ground(Earth's surface) is at low potential whereas the clouds are at higher potential. Due to this potential difference, we see lightning.

svetlana [45]3 years ago

5 0

Answer: a.) lightning

Explanation:

Lightening is the discharge of electricity within the clouds, between the clouds or from cloud to ground. This occurs due the potential difference between the two regions.

A cloud is composed of condensed water vapors. The upper region of cloud is positively charged and lower region is negatively charged.This difference causes lightning to occur. sometimes we hear the thundering sound after lightning. This occurs when high temperature of the electric discharge breaks the air insulation and air expands.

Thus, lightning provides evidence of electric fields in the atmosphere

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tankabanditka [31]

Answer:

Explanation:

Find the complete question attached

Using the principle of moment

Clockwise moment = Anticlockwise moment

AntiClockwise moment = M × 2.0

ACW moment = 2M

Clockwise moment = 40×4

Clockwise moment = 160kgcm

Equate both expression and calculate M

2M = 160

M = 160/2

M = 80kg

Hence the mass of his friend is 80kg

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4 years ago

The spaceship Lilac, based on the Purple Planet, is 759 m 759 m long, as measured at rest. When Lilac passes Earth, observers th

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Answer:

The speed of Lilac is 0.422 times of the speed of light.

Explanation:

Given that,

Length of the spaceship Lilac at rest, $L_o=759\ m$

When Lilac passes Earth, observers there measure its length to be 688 m, L = 688 m

We need to find the speed of light is Lilac moving with respect to Earth. The formula of length contraction is given by :

$L=L_o\sqrt{1-\dfrac{v^2}{c^2}} \\\\\dfrac{v}{c}=\sqrt{1-(\dfrac{L}{L_o})^2} \\\\\dfrac{v}{c}=\sqrt{1-(\dfrac{688}{759})^2} \\\\\dfrac{v}{c}=0.422\\\\v=0.422c$

So, the speed of Lilac is 0.422 times of the speed of light.

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4 years ago

Define Women Empowerment.

djyliett [7]

Answer:

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3 years ago

the hot gas lines need to be insulated? A never B always C if they are exposed to cold temperatures that could cause the refrige

muminat

The answer is a because it never needs to be insulated

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3 years ago

To measure moderately low pressures, oil with a density of 9.0 x 102 kg/m3 is used in place of mercury in a barometer. A change

Yuki888 [10]

Answer:

Δ P = 13.24 Pa

Explanation:

Given that

Density of oil ,ρ₁ = 9 x 10² kg/m³

We know that density for mercury ,ρ₂ = 13.6 x 10³ kg/m³

The change in the height of column ,Δh = 1.5 mm

The pressure given as

P = ρ g h

Change in the pressure

Δ P = ρ₁ g Δh

Now by putting the values

Δ P = 9 x 10² x 9.81 x 1.5 x 10⁻³ Pa

Δ P = 13.24 Pa

Therefor the change in the pressure will be 13.24 Pa.

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4 years ago