Tag: physics

Questions Related to physics

The distance between two atoms in a molecule is measured in the order of Angstrom.

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:

The given statement is true that distance between two atoms in a molecule is measured in the order of Angstrom.

Human life expectancy is of the order of

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

  1. $10^{6}s$

  2. $10^{7}s$

  3. $10^{8}s$

  4. $10^{9}s$

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Correct Option: A

In which of the following lists are the units an order from LONGEST to SHORTEST?

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

  1. light-year, kilometer, astronomical unit

  2. astronomical unit, kilometer, light-year

  3. kilometer, light-year, astronomical unit

  4. light-year, astronomical unit, kilometer

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Correct Option: D
Explanation:

$1$ Light year $=9.461\times 10^{15}\,m$


$1$ Astronomical unit $=1.496\times 10^{11}\,m$

$1$ kilometer $=1000\,m$

Socorrect answer is option (D).

State whether true or false.
Light year is the unit of time.

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:

Light year is the unit of distance and it is the distance covered by the light in time of one year. So the given statement is false.

A pilot while informing the position of the plane uses the following unit 

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

  1. Nauticle mile

  2. Metric ton

  3. mm of Hg

  4. Light year

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Correct Option: A
Explanation:

A nautical mile is a unit of distance that is approximately one minute of arc measured along any meridian.

1 Nauticle mile = 1.852 Km

To measure long distances which of the following method is used?

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

  1. Radio Echo

  2. Laser Pulse

  3. Parallax

  4. All of These

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Correct Option: D
Explanation:

Radio Echo, Laser Pulse and Parallax methods are used to measure mong distances.

$1$ ounce = ________ grams

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

  1. $15.51$

  2. $28.35$

  3. $45.63$

  4. $09.87$

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Correct Option: B
Explanation:

Kilogram is the metric unit of mass

$1$ ounce is equal to $0.02835$ kg
So we get $1$ ounce $=$ $0.02835 \times 1000 = 28.35$ grams
Therefore option $B$ is correct

 _______________displacement or difference in the apparent position of an object viewed along two different lines of sight, and is measured by the angle or semi-angle of inclination between those two lines.

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

  1. Echo

  2. Parallax

  3. Triangulation

  4. None of These

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Correct Option: B
Explanation:

Parallax displacement or difference in the apparent position of an object vied along two different lines of sight, and is measured by the angle or semi-angle of inclination between those two lines.

A uniform metre scale is balanced at $40\ cm$ mark, when weighs of $25\ gf$ and $10\ gf$ are suspended at $5\ cm$ mark and $75\ cm$ mark respectively. Calculate weight of metre scale.(in gf)

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

  1. 50.5

  2. 72.5

  3. 52.5

  4. 80

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Correct Option: C

Which of the following is a non-metric unit of mass ?

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

  1. pounds

  2. ounces

  3. both

  4. none

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Correct Option: C
Explanation:

The basic metric unit of mass is kilogram

Tons , pounds and ounces are non metric units of mass
Therefore option $C$ is correct