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Author Question: The geometry of our universe is A) flat. B) positively curved. C) negatively curved. D) all of ... (Read 63 times)

ashley

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on: Jul 29, 2018
The geometry of our universe is
 
  A) flat.
  B) positively curved.
  C) negatively curved.
  D) all of the above
  E) none of the above

Question 2

What is the difference between speed, velocity, and instantaneous velocity? Give examples of each.
 
  What will be an ideal response?


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bd5255

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Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: A

Answer to Question 2

Answer: All describe motion, speed being the simplest. Speed is a ratio of distance traveled per unit of time. A car driving along a road, for example, may have a speed of 30 km/h. Velocity is speed but with direction stated or implied, and is therefore a vector quantity. The same car driving due north along a road has a velocity of 30 km/h north. Instantaneous velocity is the velocity at any instant. Its magnitude is shown by the reading on a speedometer. If you get a traffic ticket for speeding, it is your instantaneous velocity, not an overall average velocity, that may get you in trouble.


ashley

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Reply 2 on: Jul 29, 2018
:D TYSM

xiaomengxian

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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