The second is currently defined as A) 1/86,400 of a mean solar ...

[ts19998]

The second is currently defined as
 
  A) 1/86,400 of a mean solar day.
  B) 1/86,164 of a sidereal day.
  C) 1/31,557,600 of the period of the Earth's rotation around the Sun.
  D) the time required for light to travel 1/299,792,458 of a meter.
  E) the time that it takes the radiation from a Cesium-133 atom to complete 9,192,631,770 cycles of oscillation.

Question 2

A plot of land contains 5.8 acres. How many square meters does it contain? 1 acre = 43,560 ft2
 
  A) 2.3  104 m2
  B) 7.1  103 m2
  C) 7.0  104 m2
  D) 5.0  104 m2

[carolinefletcherr]

Answer to Question 1

E

Answer to Question 2

A