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Author Question: Which of the following is an example in which you are traveling at constant speed but not at ... (Read 110 times)

skymedlock

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Which of the following is an example in which you are traveling at constant speed but not at constant velocity?
 
  A) rolling freely down a hill in a cart, traveling in a straight line
  B) driving backward at exactly 50 km/hr
  C) driving around in a circle at exactly 100 km/hr
  D) jumping up and down, with a period of exactly 60 hops per minute
  E) none of the above

Question 2

What is a Cepheid variable?
 
  A) It is a bright source of variable X-ray emission, thought to harbor a supermassive black hole.
  B) It is a type of very luminous star that makes an excellent standard candle.
  C) It is a main-sequence star of spectral type B5.
  D) It is a type of galaxy that varies in its light output.


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dudman123

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skymedlock

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Reply 2 on: Jul 27, 2018
Excellent


ryhom

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

 

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