General Physica...

Which of the following statements about Great Circles are correct?
(1) Great Circle is an imaginary circle which divides the Earth into two equal hemispheres.
(2) Equator is the only Great Circle, which can be drawn on the Earth's surface.
(3) An arc of a Great Circle on the surface of the Earth marks the shortest distance between two points on the Earth.
Select the correct answer using the codes given below.

Which of the following is/are cited by the scientists as evidence/evidences for the continued expansion of universe?
(1) Detection of microwaves in space.
(2) Observation of red shift phenomenon in space.
(3) Movement of asteroids in space.
(4) Occurrence of supernova explosions in space.
Select the correct answer using the codes given below.

The only planet whose period of rotation is longer than the period of revolution around the Sun is _____________.

Consider the following statements:
(1) The vernal equinox falls on 21st March.
(2) On equinox, the Sun is directly overhead at the equator.
(3) The changes in the day length after equinox result from the changes in the tilt of the Earth with respect to the Sun.
Which of the statements given above is/are correct?

The Earth without rotational movement would result into:
(1) no Sun-rise and Sun-set
(2) no occurrence of day and night cycle
(3) life would not exist on the earth
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The recent experiment at the Large Hadron Collider (LHC) build by the European Organisation for Nuclear Research (CERN) is ___________.

Which one of the following has geographical position of $${0}^{o}$$ latitude and $${0}^{o}$$ longitude?

The Earth is an oblate spheroid and not a perfect sphere. This is because:
(1) the Earth has a rotational motion and the rotational speed increases as one goes from the poles towards the equal.
(2) the equator experiences greater gravitational pull from the Sun.
(3) the intensity of Sunlight received at the equator is greater than that of the poles.
Select the correct answer using the codes given below.

How many hours of daylight does the equator experience on September equinox?

Which one of the following statements is not correct?