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Darina [25.2K]
2 years ago
14

What is standard one kilogram ?​

Physics
2 answers:
tankabanditka [31]2 years ago
7 0

Answer:

As of the 2019 redefinition of the SI base units, the kilogram is defined in terms of the second and the metre, both based on fundamental physical constants.

It is defined as the mass of a particular international prototype made of platinum-iridium and kept at the International Bureau of Weights and Measures. It was originally defined as the mass of one liter (10-3 cubic meter) of pure water. At the Earth's surface, a mass of 1 kg weighs approximately 2.20 pounds ( lb ).

Explanation:

ElenaW [278]2 years ago
4 0
2.2 pounds = 1 kilogram
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Determine the kinetic energy of a 1000 kg roller coaster car that is moving with a speed of 20.0 m/s
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Answer:

Check the explanation

Explanation:

given

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use, 1/u + 1/v = 1/f

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The image is virtual

The image is upright

given

R = 1.5 cm

object distance, u = 1.1 cm

focal length of the ball, f = -R/2

= -1.5/2

= -0.75 cm

let v is the image distance

use, 1/u + 1/v = 1/f

1/v = 1/f - 1/u

1/v = 1/(-0.75) - 1/(1.1)

v = -0.446 cm <<<<<---------------Answer

magnification, m = -v/u

= -(-0.446)/1.1

= 0.405 <<<<<<<<<---------------Answer

Kindly check the diagram in the attached image below.

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