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ohaa [14]
2 years ago
7

The idea that the Earth sits motionless in the Universe at the center of a revolving globe of stars, with the Moon and planets i

n orbit around the Earth, is the ___________ model of the Universe.
Physics
1 answer:
andrew-mc [135]2 years ago
6 0
Earth sits motionless in the universe at the center of a revolving globe of starts , with the moon and planets in orbit around the earth, is the surrounding model of the uninverse
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Johnny walked to the other side of his building using the following steps: 10 meters North, 20 meters to the West, 40 meters Sou
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<u>Answer: </u>

  Distance traveled = 70 meters

  Displacement = 36.06 meters

<u>Explanation: </u>

 Let north be positive Y and east be positive X

 10 meters north, displacement = 10 j meters

 20 meters west, displacement = -20 i meters

 40 meters south, displacement = -40 j meters

 Total displacement = (10 j - 20 i – 40 j) meters = (- 20 i - 30 j) meters

 Magnitude of displacement = \sqrt{20^2+30^2}=\sqrt{1300}= 36.06 meters

 Distance traveled = 10+20+40 = 70 meters

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