Tag: measurements and experimentation

Questions Related to measurements and experimentation

One angstrom is equal to _________ .

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

  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

Show answer
Correct Option: B
Explanation:
Angstrom is a very small unit of distance.
$1 \ angstrom = 10^{-10} \ m$

Which of the following is not the unit of length ?

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

  1. Micron

  2. Light year

  3. Angstrom

  4. Radian

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Correct Option: D
Explanation:

Angstrom, Micron and light year are all units of length but radian is the unit of angle subtended.

Angstrom is a unit used to express

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

  1. length

  2. mass

  3. time

  4. none of these

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Correct Option: A
Explanation:
Angstrom is a unit to express length.
$1 \ A^o = 10^{-10} \ m$

Par sec is a unit of:

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

  1. angle

  2. velocity

  3. time

  4. distance

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Correct Option: D
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.

1 quintal is equal to

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

  1. $\displaystyle \frac { 1 }{ 10 } $ kg

  2. 10 kg

  3. 100 kg

  4. 1000 kg

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Correct Option: C
Explanation:
Quintal is a unit of mass.
1 quintal $=$ 100 kg

1 light year is equal to 

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

  1. $\displaystyle 6.3\times { 10 }^{ 5 }\overset { o }{ A } $

  2. $\displaystyle 6.3\times { 10 }^{ 4 }$$AU$

  3. $\displaystyle 3.0\times { 10 }^{ 16 }{ ms }^{ -1 }$

  4. $\displaystyle 6.3\times { 10 }^{ 4 }\overset { o }{ A } $

Show answer
Correct Option: B
Explanation:
We know that   $1 \ light year  = 9.46\times 10^{15} \ m$
Also,   $1 \ AU = 1.5\times 10^{11} \ m$
Thus   $1 \ light year  = \dfrac{9.46\times 10^{15}}{1.5\times 10^{11}}  \ AU= 6.3\times 10^4 \ AU$

Pound is the unit of ________ in the F.P.S. system.

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

  1. mass

  2. length

  3. time

  4. temperature

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Correct Option: A
Explanation:

Pound is a unit of mass in the F.P.S. system.

1 parsec is equal to

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

  1. $\displaystyle 3.1\times { 10 }^{ 15 }m$

  2. $\displaystyle 3.1\times { 10 }^{ -15 }m$

  3. $\displaystyle 3.1\times { 10 }^{ 16 }m$

  4. $\displaystyle 3.1\times { 10 }^{ -16 }m$

Show answer
Correct Option: C
Explanation:
Parsec is the unit of distance.
$1 \ $ parsec $ = 3.1\times 10^{16} \ m$

1 light year is equal to

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

  1. $\displaystyle 9.46\times { 10 }^{ -15 }m$

  2. $\displaystyle 9.46\times { 10 }^{ 15 }m$

  3. $\displaystyle 9.46\times { 10 }^{ -13 }m$

  4. $\displaystyle 9.46\times { 10 }^{ 13 }m$

Show answer
Correct Option: B
Explanation:
One light-year is defined as the distance traveled by light in a vacuum in one year.

Number of seconds in 1 year is:
$1 year=365\times24\times\times60\times60\\=3.15\times10^7\ sec$

So,
$1 \ light \ year =3\times10^8\times3.15\times10^7\\= 9.46\times 10^{15} \ m$

1 AU is equal to

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

  1. $\displaystyle 1.5\times { 10 }^{ 11 }m$

  2. $\displaystyle 1.5\times { 10 }^{ 10 }m$

  3. $\displaystyle 1.5\times { 10 }^{ 9 }m$

  4. $\displaystyle 1.5\times { 10 }^{ -11 }m$

Show answer
Correct Option: A
Explanation:
One astronomical unit is defined as the distance between the sun and the earth.
$ 1 \ AU = 1.5\times 10^{11} \ m$