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Author Question: The SI unit of mass, the kilogram, is currently defined A) as 10-22 the mass of the Earth's moon. ... (Read 39 times)

jeatrice

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on: Jul 27, 2018
The SI unit of mass, the kilogram, is currently defined
 
  A) as 10-22 the mass of the Earth's moon.
  B) as 10-24 the mass of the Earth.
  C) by the President's weight.
  D) by a prototype platinum-iridium cylinder kept at the International Bureau of Weights and Measures in Sevres, France.
  E) the mass of 5.9786332  1026 protons.

Question 2

B-type stars have lifetimes
 
  A) long enough for advanced life to evolve
  B) too short for planet formation
  C) long enough for planets to form but not for life to appear
  D) long enough for planets to form and for simple life to appear, but not long enough for advanced life to develop


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stanleka1

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

D

Answer to Question 2

C


jeatrice

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Reply 2 on: Jul 27, 2018
YES! Correct, THANKS for helping me on my review

zacnyjessica

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

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