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ElenaW [278]
3 years ago
10

What are three everyday devices that could not been developed without the discovery of electromagnetism

Physics
2 answers:
Tju [1.3M]3 years ago
8 0
Speakers, headphones, telephone, and microphones.
Slav-nsk [51]3 years ago
5 0
Lamps, cellphones (the greatest invention), and laptops hope this helps :)
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The base ( foundation ) of building is made wider. Why ?​
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Explanation: ...

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Which factor does not affect the resistance of a material?
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A 100 kg marble slab falls off a skyscraper and falls 200 m to the ground without hitting anyone. Its fall stops within millisec
Radda [10]

Answer:

Δ T = 2.28°C

Explanation:

given,

mass of marble = 100 Kg

height of fall = 200 m

acceleration due to gravity = 9.8 m/s²

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using conservation of energy

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  m g h = m C_{marble}\Delta T

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7 0
3 years ago
THE LARGEST HORIZONTAL PLATES IS SEPARATED BY 4mm .The plate is at the potencial of -6V . What potencial should be applied to th
Serhud [2]

Answer:

V₂ = -22 V

Explanation:

Electric potential and field are related

         ΔV = - E d

where ΔV is the potential difference between the plates, E the electric field and d the separation between the plates

 

In this exercise we are given the parcionero d = 4 mm = 0.004 m, the potential of one of the plates V1 = -6V and the value of the electric field E = 4000 V / m

          V₂- V₁ = - E d

          V₂ = - Ed + V₁

          V₂ = - 4000 0.004 + (- 6)

          V₂ = -16 - 6

          V₂ = -22 V

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the pe at the top of the building: 784 J

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the pe just before hitting the ground: 784 J

Explanation:

Pls brainliest me

I had this question before

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3 years ago
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