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Author Question: The standard unit of time, the second, is now defined with reference to a. the Earth's revolution ... (Read 18 times)

APUS57

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on: Jul 28, 2018
The standard unit of time, the second, is now defined with reference to
 a. the Earth's revolution period.
  b. the mean solar day.
  c. the cesium-133 atom.
  d. the Earth's rotation period.

Question 2

The standard unit of length, the meter, is now defined with reference to
 a. a meridian on the Earth.
  b. the French meter.
  c. the speed of light.
  d. a platinum-iridium bar.
  e. a member of the royal family.


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billybob123

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Reply #1 on: Jul 28, 2018
Answer to Question 1

c

Answer to Question 2

c


APUS57

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Reply 2 on: Jul 28, 2018
Wow, this really help

mohan

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Reply 3 on: Yesterday
Excellent

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