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Author Question: When a spinning ice skater pulls in his arms, he spins faster because ________. A) there exists ... (Read 149 times)

renzo156

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on: Jul 27, 2018
When a spinning ice skater pulls in his arms, he spins faster because ________.
 
  A) there exists an unbalanced reaction force
  B) there is less friction with the ice
  C) there is less friction with the air
  D) his angular momentum must be conserved, so reducing his radius must increase his speed of rotation

Question 2

Which object has aged the most since it emitted the light we see today?
 
  A) the Sun B) Pluto
  C) a star near the center of the Milky Way D) a star in the Andromeda Galaxy


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Benayers

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Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

D


renzo156

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Reply 2 on: Jul 27, 2018
Gracias!

okolip

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Reply 3 on: Yesterday
Excellent

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