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Author Question: Astronaut Jill leaves Earth in a spaceship and is now traveling at a speed of 0.280c relative to an ... (Read 73 times)

fbq8i

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Astronaut Jill leaves Earth in a spaceship and is now traveling at a speed of 0.280c relative to an observer on Earth. When Jill left Earth, the spaceship was equipped with all kinds of scientific instruments, including a meter stick.
 
  Now that Jill is underway, how long does she measure the meter stick to be? A) 1.00 m
  B) 0.960 m
  C) 1.04 m
  D) 0.280 m
  E) 1.28 m

Question 2

Two men, Joel and Jerry, push against a car that has stalled, trying unsuccessfully to get it moving. Jerry stops after 10 min, while Joel is able to push for 5.0 min longer. Compare the work they do on the car.
 
  A) Joel does 75 more work than Jerry.
  B) Joel does 50 more work than Jerry.
  C) Jerry does 50 more work than Joel.
  D) Joel does 25 more work than Jerry.
  E) Neither of them does any work.


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carojassy25

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fbq8i

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Reply 2 on: Jul 29, 2018
Thanks for the timely response, appreciate it


parshano

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

 

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