3 years ago

Which event occurred approximately 4.6 billion years ago

Physics

1 answer:

Levart [38]3 years ago

4 0

The answer to this is formation of earth and our solar system

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The right answer should be B

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2 years ago

An object has a height of 0.066 m and is held 0.210 m in front of a converging lens with a focal length of 0.140 m. (Include the

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Explanation:

Given that,

Size of object, h = 0.066 m

Object distance from the lens, u = 0.210 m (negative)

Focal length of the converging lens, f = 0.14 m

If v is the image distance from the lens, we can find it using lens formula as follows :

$\dfrac{1}{v}-\dfrac{1}{u}=\dfrac{1}{f}\\\\\dfrac{1}{v}=\dfrac{1}{f}+\dfrac{1}{u}\\\\\dfrac{1}{v}=\dfrac{1}{0.14 }+\dfrac{1}{(-0.21)}\\\\v=0.42\ m$

(a) Magnification,

$m=\dfrac{v}{u}\\\\m=\dfrac{0.42}{(-0.21)}\\\\m=-2$

(b) Magnification, $m=\dfrac{h'}{h}$

h' is image height

$-2=\dfrac{h'}{0.066}\\\\h'=-2\times 0.066\\\\h'=-0.132\ m$

Hence, this is the required solution.

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2 years ago

Is friction and pushing similar ????

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Answer:

Yes, they are.

Explanation:

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The four major Earth systems are the atmosphere, lithosphere, hydrosphere, and geosphere. true and false

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False its atmosphere, lithosphere, hydrosphere, and boisphere

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When the box IS on the shelf 2m above the ground,
its potential energy is

(weight) x (height) = (3 N) x (2 m) = 6 joules .

THAT's the work you have to do, to lift the box up to there.

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2 years ago