Tag: measuring distance of celestial bodies

Questions Related to measuring distance of celestial bodies

Complete the following:
$1$ quintal $=$ _________ kg
physics measurements and experimentation measuring distance of celestial bodies unconventional units of measurements units of mass

  1. $10$

  2. $100$

  3. $1000$

  4. $0.01$

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Correct Option: B
Explanation:

A quintal is a unit of mass in the metric system which is equal to $100$ kilograms.

Mass is a ....................... quantity.

physics measurement and measuring instrument measuring distance of celestial bodies unconventional units of measurements units of mass

  1. Scalar 

  2. Vector

  3. Tensor

  4. All

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Correct Option: A
Explanation:

Since the physical quantity mass has only magnitude but not direction, thus mass is a scalar quantity.

What is the value of $1  \ m $ in $\mathring{A}$?

physics measurement and measuring instrument measuring distance of celestial bodies unconventional units of measurements units of mass

  1. $10^{-10}$

  2. $10^{5}$

  3. $10^{7}$

  4. $10^{10}$

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Correct Option: D
Explanation:
$1 m = 10^{10} \mathring{A}$
or we can say 1 angstrom $=10^{-10} m$
The natural sciences and technology often uses angstrom to express sizes of atoms, molecules, microscopic biological structures, and lengths of chemical bonds, arrangement of atoms in crystals, wavelengths of electromagnetic radiation.

The number of fermi in $1$ meter is _____. 

physics measurement and measuring instrument measuring distance of celestial bodies unconventional units of measurements units of mass

  1. $10^{13}$

  2. $10^{14}$

  3. $10^{15}$

  4. $10^{16}$

Show answer
Correct Option: C
Explanation:

Since,  $1\ Fm={10}^{-15}m$


$\therefore$  $\cfrac{1}{{10}^{-15}}Fermi =1m$

${10}^{15}Fermi=1m$

The unit of atomic mass is

physics measurement and measuring instrument measuring distance of celestial bodies unconventional units of measurements units of mass

  1. mu

  2. kg

  3. amu

  4. g

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Correct Option: C
Explanation:

Atomic mass is the mass of an atom. An atomic mass unit (symbolized AMU or amu) is defined as precisely $\dfrac{1}{12}$ the mass of an atom of carbon-12.

Which of the following is smallest unit of distance ?

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

  1. Milimeter

  2. Angstrom

  3. Fermi

  4. Meter

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Correct Option: C
Explanation:

Out of these, meter is the largest.
$1 millimeter = 10^{-3} m$
$1 Angstrom = 10^{-10}m$
$1 Fermi = 10^{-15}m$
Thus Fermi is the smallest.

Parsec in the unit of which physical quantity?

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

  1. Time

  2. Distance

  3. Frequency

  4. Angular acceleration

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Correct Option: B
Explanation:

Parallactic second or parsec is a unit of distance defined as the distance at which one astronomical unit subtends an angle of one arcsecond, which is equal to 3.26 light years.

State whether the following statement is True or False. 

The prefix used for $\displaystyle { 10 }^{ 9 }$ is nano.

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

  1. True

  2. False

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Correct Option: B
Explanation:

The prefix used for $\displaystyle { 10 }^{ -9 }$ is nano and prefix used for $10^9$ is Giga

In CGS system, gram is the unit of mass. State true or false.

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

  1. True

  2. False

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Correct Option: A
Explanation:

Gram is the unit of mass in the CGS system

State whether the following statement is True or False. 

One micron is equal to $\displaystyle { 10 }^{ -3 }m$.

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

  1. True

  2. False

Show answer
Correct Option: B
Explanation:
We know that  $1 \mu m = 10^{-6} \ m$
Thus the given statement is false.