Geography · Physics

Geodesy and Celestial Mechanics

1,049 Questions

Geodesy and celestial mechanics questions explore Earth measurements, great circles, and planetary motions. These concepts form a crucial part of physical geography and astronomy in competitive exams. Practice these questions to grasp longitudinal and latitudinal calculations.

Longitude and latitude calculationsGreat circle conceptEarths axial precessionLagrangian pointsAtmosphere boundary

Geodesy and Celestial Mechanics Questions

Multiple choice physics energy production causes of greenhouse effect global warming adaptation in animals

The average temperature of the Earth remains fairly steady as compared to that of the moon because of the

  1. atmosphere

  2. lithosphere

  3. biosphere

  4. hydrosphere
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The average temperature of the earth remains fairly steady as compared to that of the moon because of the earth's atmosphere. Atmosphere of earth absorbing ultraviolet solar radiation, warming the surface through heat retention (green house effect), and reducing temperature extremes between day and night. Moon has no atmosphere. 

Multiple choice social studies importance of transport system importance of transportation system introduction to transport and communication transportation services language, writing and great books

When a communication satellite passes into Earth's shadow, its temperature drops to about __________ K.

  1. 123

  2. 245

  3. 273

  4. 100
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When a satellite enters the Earth's shadow (eclipse), it loses solar power and its temperature drops significantly, typically stabilizing around 123 K.

Multiple choice physics rotational motion of a rigid body and moment of inertia angular momentum (l) and conservation of angular momentum angular momentum in case of rotation about a fixed axis law of conservation of angular momentum

Let $A$ be the area swept by the line joining the earth and the sun during Feb 2012. The area swept by the same line during the first week of that month is

  1. $\dfrac{A}{4}$
  2. $\dfrac{7A}{29}$
  3. $A$
  4. $\dfrac{7A}{30}$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Kepler's second law states that the radius vector sweeps out equal areas in equal times. February 2012 had 29 days. The area swept in 7 days is 7/29 of the total area.

Multiple choice physics fluid pressure pressure in air introduction to atmospheric pressure pressure exerted by air devices to measure pressure

In free space, Fortin's barometer will read:

  1. $0\ mm$ of Hg
  2. $76\ cm$ of Hg
  3. $1\ cm$ of Hg

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Fortin's barometer is a modified form of Torricelli's barometer which is used to measure atmospheric pressure. In free space there is no matter (no atmosphere) therefore no atmospheric  pressure hence barometer will read 0mm of Hg .

Multiple choice geography interior of the earth the earth's structure components of earth earth and structure

 _____ is the model of the earth. 

  1. Globe

  2. Satellite

  3. Universe

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A 3-dimensional model of the Earth is called globe. We cannot see the Earth all of it at once as it is so large. So, globe helps us to see what the whole Earth looks like. A globe is better representation of earth in comparison to a flat map. As the Earth spins on its axis, globe also has an axis and we can rotate it. The globe is tilted to one side because the Earth itself is tilted. So, a globe helps in properly studying the Earth.

Multiple choice biology living in harmony climate factors abiotic components organisms and environment

Identify which is not correct?

  1. Age of Universe -$20$ Billion years
  2. Age of Earth - $4.5$ Billion years
  3. Life appeared on earth - $500$ million years

  4. Both a & b
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The current scientific estimate for the age of the universe is approximately 13.8 billion years, not 20 billion years. The other values provided are generally accepted scientific approximations.

Multiple choice biology living in harmony climate factors abiotic components organisms and environment

The earth is tilted at an angle of $23.5^{o}$  with respect to the plane of its orbit around the sun. If the amount of tilt were increased to $40^{o}$, we would expect in middle latitudes:

  1. Hotter summers and colder winters than at present

  2. Cooler summers and milder winters than at present

  3. Hotter summers and milder winters than at present

  4. Cooler summers and colder winters than at present
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A greater axial tilt increases the intensity of solar radiation received during the summer (hotter summers) and decreases it during the winter (colder winters) in middle latitudes, as the angle of the sun becomes more extreme.