3 years ago

Please help i really need it. this is my physic exam

Physics

2 answers:

erastova [34]3 years ago

7 0

Correct answer is C.

Harlamova29_29 [7]3 years ago

3 0

Answer:

bout=14.4V , b)R2=80

am i right

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nikdorinn [45]

Answer:

B. A repulsive force of 8.0*10^3 N.

Explanation:

As we know by Coulomb's law that the electrostatic force between two charges is given as

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here we know that

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3 years ago

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andrey2020 [161]

Work needed = 23,520 J

<h3>Further explanation</h3>

Given

height = 12 m

mass = 200 kg

Required

work needed by the crane

Solution

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W = Work, J, Nm

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d = distance, m

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