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Multiple choice physics measurements and experimentation measuring distance of celestial bodies unconventional units of measurements units of mass

One angstrom is equal to _________ .

  1. $\displaystyle { 10 }^{ -12 }m$
  2. $\displaystyle { 10 }^{ -10 }m$

  3. the time taken by Neil Armstrong to reach the moon

  4. the distance travelled by Neil Armstrong on the surface of the moon
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Angstrom is a very small unit of distance.
$1 \ angstrom = 10^{-10} \ m$
Multiple choice physics measurements and experimentation measuring distance of celestial bodies unconventional units of measurements units of mass

Par sec is a unit of:

  1. angle

  2. velocity

  3. time

  4. distance
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The parsec is a unit of length used to measure the large distances to astronomical objects outside the Solar System. One parsec is approximately equal to 31 trillion kilometres or about 3.26 light-years. One parsec is the distance to an object whose parallax angle is one arcsecond.