3 years ago

Help ppl ..I don’t know nothing

Physics

1 answer:

Leto [7]3 years ago

7 0

#2 - A metal railing rusting in camp weather. Rusting is a chemical change.

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I think it's RF technology

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3 years ago

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How much work is done when a 900 N man spends 5 minutes pushing an immovable wall?

mariarad [96]

Answer: e ven though the man exerts force on the wall , the wall does not move. Work done = force applied * displacement and since the displacement of the wall is zero. , work done is also zero

Explanation:

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2 years ago

How much work is done if a force of 20 N is used to move an object 6 meters

Nikolay [14]

Explanation:

W=f×d

=20×6

w=120 joule

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3 years ago

A spherical, concave shaving mirror has a radius of curvature of 0.983 m. What is the magnification of a person's face when it i

Georgia [21]

Answer:

Magnification = 1

Explanation:

given data

radius of curvature r = - 0.983 m

image distance u = - 0.155

solution

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f = -0.4915 m

we use here formula that is

$\frac{1}{v} + \frac{1}{u} + \frac{1}{f}$ .................2

put here value and we get

$\frac{1}{v} = \frac{1}{0.155} - \frac{1}{4915}$

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3 years ago

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Answer:

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3 years ago