Practical units of length , Mass & Time

This is the average distance between sun and earth

• One Light Year

• One astronomical unit

• Parallactic second

• One Angstrom

Answer explanation

astronomical unit (AU):

One astronomical unit is the average distance between sun and earth.

        1AU = 1.496 × 10¹¹m

Shake Means :

• smallest practical unit of time

• 1 shake = 10^-8s

• 1 Shake = 365.25 days

• All the above

Answer explanation

Shake: It is the smallest practical unit of time. 1 shake = 10^-8s

Mark which '1' is parallactic second

It is the largest practical unit of length

• light year

• astronomical unit

• angstrom unit

• parallactic second

Millennium = ____________Years

It is the largest practical unit of mass

• atomic mass unit

• chandra shekhar limit

• Shake

• metric ton

light year(ly) is

• 1 ly = 9.46 ×10¹⁵m

• one light year is the distance travelled by light in one second through vacuum

• one light year is the distance travelled by light in one year through vacuum

• None of These

Find the percentage error in Surface area of a sphere, whose diameter is measured with 2% error

• 1%

• 2%

• 3%

• 4%

500 - number of significant numbers

• 1

• 2

• 3

• 4

Which of the following  is not used as the unit of length

• Micron     

• Light year             

• Angstrom

• Radian