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Law Incorporation [45]
3 years ago
15

Which simple experiment could be conducted to show an example of how lightning is created? A) Rub a balloon so it picks up extra

electrons from the sweater or your hair and becomes slightly negatively charged. B) Rub a balloon filled with air on a wool sweater or on your hair. Then hold it up to a wall. C) Connect the positive pole of an electrical source to the negative pole, so you create a circuit. D) Walk across a carpet, shuffling your feet and touching something made of metal.
Physics
1 answer:
alexandr1967 [171]3 years ago
7 0

I think the answer is d

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By the time she managed/had managed to open the door, the postman already went/had already gone.
leva [86]

Answer:

<h3>Answer Sentence: </h3><h2><em><u>By the time she had managed to open the door, the postman had already gone</u></em>.</h2>
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An astronaut sitting on the launch pad on Earth's surface is 6,400 kilometers from Earth's center and weighs 400 newtons. Calcul
PIT_PIT [208]

Answer:

weight at height = 100 N .

Explanation:

The problem relates to variation of weight  due to change in height .

Let g₀ and g₁ be acceleration due to gravity , m is mass of the object .

At the surface :

Applying Newton's law of gravitation

mg₀ = G Mm / R²

At height h from centre

mg₁ = G Mm /h²

Given mg₀ = 400 N

400 = G Mm / R²

400 = G Mm / (6400 x 10³ )²

G Mm = 400 x (6400 x 10³ )²

At height h from centre

mg₁ =  400 x (6400 x 10³ )²/ ( 2 x 6400 x 10³)²

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5 0
3 years ago
A need the answers pleaseeeee
IRISSAK [1]

It's just asking you to sit down and COUNT the little squares in each sector.

It'll help you keep everything straight if you take a very sharp pencil and make a tiny dot in each square as you count it.  That way, you'll be able to see which ones you haven't counted yet, and also you won't count a square twice when you see that it already has a dot in it.

(If, by some chance, this is a picture of the orbit of a planet revolving around the sun ... as I think it might be ... then you should find that both sectors jhave the same number of squares.)  

7 0
3 years ago
Name the four fundamental fores at work inside an atom. Tell what each one does.​
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Answer:

Four fundamental forces are gravitational, electromagnetic, strong, and weak.

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2 years ago
What are the characteristics of a blackbody radiator? Give an example.
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Answer:

A blackbody, or Planckian radiator, is a cavity within a heated material from which heat cannot escape. No matter what the material, the walls of the cavity exhibit a characteristic spectral emission, which is a function of its temperature.

Example:

Emission from a blackbody is temperature dependent and at high temperature, a blackbody will emit a spectrum of photon energies that span the visible range, and therefore it will appear white. The Sun is an example of a high-temperature blackbody.

3 0
3 years ago
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